M20 885 head Our stage 1 head has wider ports on both intake and exhaust side, as well as reshaped and I can help with this, might have done an m20 head, or two, hehe. If you go to a local machine shop, you'll not only save on money, but time. Moderator Another performance 885 going out today! This one is going to be boosted. M20 turbo (especially on the SETA bottom end with an 885 head swap) is a relatively cheap and proven setup for the E30. But then, it was not Stock good M20 885 cylinder head All new parts bought from Bimmerheads 1mm oversized intake and exhaust valves NEW 274 cam Heavy Duty rocker arms New rocker shafts Gates racing Personally i have mostly been looking at the 2. And I use E85 Hey folks 🙂 I haven't posted on here in a long time. Don't think so . 885 Head thickness 07-24-2015, 02:32 PM. Exhaust Generic Upgrade: 731 head In the later M20's (2. 030 off the head gasket and get closer to 0. 7i (flat pistons/885 head, eta manifold ported to accept the "i" throttle body), it gives more torque and power than a "i" manifold - but also, power drops more rapidly after 6000rpm than the "i" manifold on a 2. A flat top 2. No, the eta manifold does not flow better, but coupled with the 2. Got our performance M20 head a few days ago. M20 cylinder head '885' style AMC with valves and springs I basically have an m20 that i got for free so just seeing if it’s something i want to do. Cheers. 93 rear diff, dtm shifter, Curnt m20 stkr msq. Stock 885 head, IE billet 272 cam, BBTB, stock 320i exhaust with eBay catback. 7 bottom ends and recently came across someone selling this: "This is a BMW E30 cylinder head from the B27 2. I have decided to swap out my head to an 885 from a 325i I have read a bunch of threads and posts, but none of them have a full detailed list of parts i need to do the swap. M20 aftermarket head bolts? Has the OP made any reference to his car being turboed? no. This is mainly due to the fact that the M20 cylinder head is particularly prone to wear in a few areas. 7L with the 200 head, this motor is the eta or the economy m20. I won't lie, using the 885 head with ETA bottom end greatly reduces the squish band area compared to the 200 head. 885 head off 325i will not work, you will end up with extremely low compression ratio and wrong intake I'm currently swapping the AMC head on my BMW E30 to an original 885 head. 3:1. IMHO the compression ratio and displacement of the M52 crank setup are better for a turbo, 9. We go over the step by step process in great E30 M20 885 cylinder head, pulled from a running 1993 convertible. 0-10psi=stock headbolts,can get away with WAR or other tuning methods 10-16psi=ARP head bolts+MS 17-20psi=+wasted spark 20-23psi=+welded coolant channels 23+psi=Build the snot out of it- ARPs,welded head,oring block and beefy lower end. Frickin awesome platform to learn on. 3/1 . Hey R3V- 325i pistons, and 885 head, and deck the block 2mm. 75cc. *The cam and stem seals are stand-ins for the actual parts not Sorry for the delay, I've been moving for almost two months straight. 9L street-stroker pistons. Eventually i plan on doing itbs or turbo and either way i'd like to raise the redline. Getting my 731 head to breathe! im in australia where e30 parts are expensive etc an 885 head is about a 1000 bucks second hand and custom piston about 800-1000 any 3. 7L (m20) with an 885 head, i plan to install arp studs and a cutring gasket. diameter inlet/outlet inlet eta head or type "200" head e21 B20 320/6 and B23 323i. above that is a bit of a gamble, so you might as well go with studs. OEM head is nicer by every metric but only the AMC head can be bought new, so there’s that. 5mm x 9. It will be using our Super Sport Performance head. This head is ideal for a buyer looking for a stock-ish head not a highly modified option. The Final: 885 head The final version was 11 12 1 705 885 or "885" introduced in the 325i. And also disproves a lot of theories that were around then. 7 with an 885 head + eta pistons + 325i exhaust manifold + Fritz exhaust makes 137 whp/175fhp@ 5900 rpm. That is important to remember so don't just load these figures in unless you realize what that means! -Any M20 block-885 (325i) head. Today's Posts; Member List; Calendar; Forum; E30 Classified Forums; For Sale & Wanted; Parts For Sale; If this is your first visit, be sure to check out the FAQ by clicking the link above. The only other option would be the 323i Euro 731 cylinder head but you'll make more power based on the 885 head flow numbers (exh/int ratio) a non split duration cam like a 272/272 makes more sense IMO but the 284/272 does work well and many have used it with My pop's 70's Corvette makes 10bhp more than a stock m20 with his 350 and "rock crusher 4 speed" lol. I tried all kinds of setups (with motronic ecu type 173) and the flat piston with the 885 head gives you a comp of 8. 7 with 81mm crank, 130mm rod, b25 piston, 885 head and blocked decked etc is easily worth the effort over putting the 885 head onto a complete "conventional" After months of development we are proud to introduce the ultimate M20 2. sigpic 1987 - 325i Convertible Delphin Auto [SOLD], 325i Convertible Delphin Manual [SOLD] 1989 - 325i Convertible Bronzit m30b35 swapped [SCRAPPED], 325i Sedan Alpine Auto[DD] 1991 The dynojet vs jakes dyno comparison is valuable to me, because when we Dyno'd Linda my old 3. 5 m20 head on his eta 2. Got it got 95 bucks in very good condition. As digger reminded me recently, I understand not every build is on an "unlimited budget". 885 m20 cylinder head bare Bare 885 cylinder that has been pressure tested. We can't wait to see it in action! BimmerHeads Classic BMW Specialists Santa BMW 325i E30 E34 M20 Completely Rebuild 885 Cylinder Head -325i 325is 1987-1992 SKU: $0. you got to Did the same compatible 885 head also come on some 325's? I found a 87 325es locally that I can get for next to nothing for parts. I am looking into a m20 stroker as i would like to keep the m20 and realise this path will be more costly, so i have been looking at the IE kits online and also have read the DIY threads which by the sounds of it maybe the way to go, but in terms of power and reliability, is there much gain in a 3. B25 it should be 885, for a 320i it should be 731 I think. I am just going to convert this 885 head with dual valve springs and a “K” cam. I have yet to fond a bad used m20 spring. Our Touring head comes standard with new Supertech stainless steel black nitride valves. Very low compression test - B27 w/ 885 head 06-17-2024, 07:03 PM. The bowl shaped b25 pistons and Super ETA pistons need the 885 head. Tested 106 likes, 2 comments - missionmotorwerks on August 23, 2024: "BMW M20 885 head and all its parts ready for machine work. Get a supereta long block, swap in an 'i' cam and valve springs, and you have a free breathing, high revving stroker! I went on www. Will I need seta pistons and/or b25 crank and rods. MR 325. With the 885 head, the compression was dropped to around 9. sigpic 1987 - 325i Convertible Delphin Auto [SOLD], The nature of the engine and poorly designed head from factory greatly hinders airflow. Today's Posts; Member List; Calendar; Forum; E30 Technical Forums; Engine & Drivetrain; M20; If this is your first visit, be sure to check out the FAQ by clicking the link above. 9L strocker (84mm cam with 85mm IE/Mahle pistons), Megasquirt, stock intake manifold for now. $175 E30 M20 oil pan. 100. bmwway. obviously there are exceptions, for example I got a away with 23psi on M20 turbo (especially on the SETA bottom end with an 885 head swap) is a relatively cheap and proven setup for the E30. 0L m20 makes 180 whp stock intake manifold and modified exhaust. 8:1 compression ratio, 170 psi. I basically can't afford to build an engine around this head right An 885 head on a stock m20b27 bottom end is going to lower your CR. I have the 2. Find top brands, exclusive offers, and unbeatable prices on eBay. One of my boys called me this afternoon about putting a 2. 7i thread under the m20 section. I need an 885 casting cylinder head without and repairs or cracks. I recommend replacing the seta head with a good "i" head that already has the cam, springs, etc. I have a Rimac spring tester, have tested thousands of m20 springs, and they all come in spec. "i" cam vs eta cam in 885 head for boost 10-04-2013, 09:47 PM. I bought a head with the valves and springs but no cam, rockers & rocker shafts. Got it cleaned up some. 7ETA bottom end. This is an “885 casting” but made by aftermarket company AMC. I've also done a few ITB engines that are making well into the 200's non-roller Well my 2. DBilas 284 - 11. post pics later. I've read everything about this build and found that we need to get the 325i crank pulley (toothed) to make it work. We can't wait to see it in action! BimmerHeads Classic BMW Specialists Santa As in the title need help building an 2. 7 and 885 head Engine identification. 7i build then boosting! I'm balling on a budget so I can't drop $3,000 on this right now but this will be a on going build! Questions are How should I rebuild this to not have any weak Finished my 327i a couple weeks ago. M20 Stroker Sleeve. 885 Head Port and Polish 284 Cam Stock Valve OEM Dual Springs HD Rockers Others Pink Top Injectors 21# Megasquirt 2 (Whodwho) Cold Here is my M20 E85 timing map. 0L m20 Sorry if I have to beat a dead horse again. Yeah, according to the m20 compression ratio calculator I believe it works out to an 8. The seta cam has a very similar profile as the eta, I didn't measure much more than lift, though. I don't think they're worth much unported since 885 heads aren't exactly rare. Your restricting factors right now are rod length and piston choice. In this guide, we will show you the correct procedure for stripping and rebuilding an M20 Cylinder Head. The swap should also have a larger radiator and an oiler cooler, although both of those could be removed for just oil filter and the 320i radiator. With the super eta pistons I believe it's a little lower. Also check out our other cylinder heads for M20B25. Typically this is referred to as: a “Frankenstein” engine, M20B257, M20B25+27, “stroker” motor, “2. 1 stroker over the 2. 7i”, or “327i”. 140' head head gasket , IG1000's, MS3 PRO, long tube headers, mild porting, race cam, welded diff puck clutch, poly all around, subframes reainforced, 2. 885 heads came with single springs in 1988 only. Bottom end Stock low compression eta 2. 8L). Get a supereta long block, swap in an 'i' cam and valve springs, and you have a free breathing, high revving stroker! A b27 block with an 885 head is (of course) a 2. some say that it isn't noticeable and some say it is really bad. 1L M20, 89. Does anyone know what the dimensions are of the stock M20 valve springs on the 885 head, like the length, width and if other year BMWs I'm picking up a decent mileage (around 90k) "I" m20 swap here soon with a brand new head/gasket/arp studs, and I'm not wanting to simply do the "eta" to "I" swap stock for stock. I basically can't afford to build an engine around this head right now. Either from 325e, 320i, 323i etc It is my first ever build. 3:1 with the 885 head unmodified with a stock gasket and the eta pistons. 5:1 due to a different combustion chamber design and the pistons not matching the head. Setup is 885 head with a 280/274 cam and a 2. Bottom end Stock low compression eta Otherwise all is good in M20 land. As mentioned, just add inner springs, change the cam to the "k" cam and be done with it. $225 shipped in the US #1 JE can do 4032 but you need someone with the OE piston dome profile if using a 885 head. We have hundreds of flow tests in and are using up all our cracked/damaged heads. Ports were further enlarged, valves were larger (36/42mm) and the combustion chamber M20 Race 885 Cylinder Head. M20 cylinder head '885' style AMC with valves and springs based on the 885 head flow numbers (exh/int ratio) a non split duration cam like a 272/272 makes more sense IMO but the 284/272 does work well and many have used it with good sucess. $200 plus shipping. On the head, i think exhaust side, an N/A super eta bottom end with the 885 head and 3. 8 crank, along with 45mm triple webers, also a healthy amount of head work. I’m looking to boost it. even that is still only part of the story there is a B23 cam found in a 200 head (E21 323i) and the B20 cam found in a 731 (E30 320i) so pre boost ,87 327i stroker, 885 head and b25 intake,, cometic . I had issues on my m20b25 on my 89 325 convertible. Mileage? Pics? I currently have a 2. 00. m20 turbo can be done dirt cheap or expensive, 2. There should be a number printed on the head under the intake I believe, for. 7 bottom end with an 885 head so they require more timing then a normal 2. The 885 head allows for more intake and exhaust flow and paired with a chip on the stock ETA ecu makes a ton of low end torque reving to about 6k. head 731 with 42mm intake valves fitted (std 885 head) and Rhd porting. Posted March An 885 head bolted directly to a euro 10. The cam is an 'e' profile, and it uses single valve springs, vs. FAQ [] The 885 head on an eta engine is an upgrade over a full eta, but that's where it stops. 0 M20B20 and 2. 5 blocks, 885 heads on 2. The nature of the engine and poorly designed head from factory greatly hinders airflow. This is not complete yet, I will update it periodically until I finish it. But I’m partly going this route since it is one of the more straightforward options. With that being said, you won’t be able to make that amount of power from an M20B27 unless you swap on an “885” cylinder head. I'm considering a few cams: 1. First AutoX, I had a tough time finding any traction, due to the huge jump in power. I'm piecing together a 3. This version of our 885 head is great for those planning to build high horsepower stroker M20 engines or turbo monsters. 3:1 Add to Cart . 7l ETA bottom end for an extremely cheap, high compression M20 stroker. ipg-supertech. As the title states, I am planning to build an M20 stroker setup for my VGT turbo car, to replace the currently running "2. Regular price $1,296. He has done a bunch of comparisons between different M20 M20 with 885 head with OEM size valves and new oem valve springs, 2. I currently have a 2. Thread Tools. It has been cleaned, machined, ported and polished, for better airflow. $2,125. 39 posts 1; 2; Next; edf E30 Zone Newbie Posts: 84 Joined: Mon Sep 26, 2005 10:00 pm Location: Norfolk. Look up a guy named ForcedFirebird on R3V. This information is very useful for anyone looking to build there m20. Moderator: martauto. Now, I wouldn't know too much about turbos but after a little research, the stock bolts should be perfect for 5-8 psi. 7 m20, I will be keeping the k jet system and using a 731 head. Post Cancel. Andrews Well it isn't, a 2. lThe duration on the SETA cam is much shorter. 7L Mahle If you have an 885 head then it will likely have the 885 pistons (either HC or LC) anyway so not much help unless it has been completely cowboy built and you spot pistons for I've heard stories of people buying engines, and having 200 heads on 2. 5/885. View Profile View Forum Posts Member Join Date Dec 2011 Location New Zealand Posts 95 My Cars Since the M20B27 shares the same bottom end as the B25, its limit is the same. Ive BMW 325i E30 E34 M20 Completely Rebuild 885 Cylinder Head -325i 325is 1987-1992 SKU: $0. That is important to remember so don't just load these figures in unless you realize what that means! I have yet to fond a bad used m20 spring. 069 head gasket: 0. Find many great new & used options and get the best deals for BMW OEM E28 E30 E34 M20 885 CYLINDER HEAD COMPLETE W/ CAMSHAFT 11122141607 at the best online prices at eBay! Free shipping for many products! Skip to main content. 7L eta motor. The stock 2. 7 engine with 135mm rods, custom flat top pistons and heavily worked 731 head sounds interesting but it would struggle to keep up with a similar engine with 885 head and B25 inlet with a lot less build effort. Then tossed it on my 2. I'm not sure about the 11:1 euro eta's, but I believe the 731 would retain that compression ratio. The head has a tappet issue so ay need a rebuild but is other wise sound, and more air. I think i will still go through with it. Hey guys, i recently bought a boosted e30 that unfortunately blew up the moment I unloaded it off of the truck. Please specify if 731 or 885 head was used, as the combustion chamber designs differ. The one weak point of the M20 engine is the head; specifically the 885 head fitted to the 325i. Car ran until taken apart. 3. BMW M20 Low Compression 2. 7 m20. 5 liter 885 cylinderhead. 040 piston to head clearance for an 8. This usually happens in situations of overheating, and it is therefore critical to keep the cooling system in optimum condition. 5:1 compression ratio. I would find a 885 head from a scrap car and bolt it on. I'm not wanting an all out build or anything radical, but, I'm just wondering what some reasonably priced bolt-ons are that would be worth the money and add a few extra horses. Once again, take your time, follow a Bentley, and there will be NO change in reliability. This includes 2. 35:1 CR. Also check out our other Brand new cylinder head for M20B25. 7i. The valves & seats will get a regrind I already got a new KS camshaft because the old one is worn down. Cylinderhead comes with valve seats, valve guides, new valves and valve springs. 7i (flat pistons/885 head, eta Hi there, I am a newbie and am going to have a machine shop rebuild my 885 head. So my thoughts are this, run the stock bottom end, use an 885 325i head and intake with motronic 1. The highest hp N/A m20 Ive seen pushes 259rwkw, running JE 14:1 pistons, that are pretty flat topped, also running 135mm rods, and a 2. The supereta also utilizes the '885' head, complete with all 5 cam journals so no extra machining is neccesary. I'm willing to unload the head and send you guys this stuff so you can Home Board index E30 Technical, Modifications & Performance Engine Swaps / Forced Induction General Chat M20 Engines; M20 2. high mile block with refresh head (all "i" components) I will typically see around 150-157whp/tq eta block with "i" top end and electronics: 134whp 145wtq eta block, 885 head, eta manifold, "i" throttle body: 145whp 170wtq Title says it all, head was machined down -. Our Super Sport head comes standard with new This version of our 885 head is great for those planning to build a totally stock engine all the way up to a dedicated SpecE30 race car. Unless you are looking for a higher spring rate, the m20 springs are actually robust. BMW M20 “885 casting” head complete and available to purchase! This is the aftermarket AMC version and was a core we had at the shop. ” Read Less about the seller notes Nice! Yeah that’s what I’m looking for. 5 head. 5:1 pistons. Owner Nick. 5:1 and headers, made 208whp with the stock single throttle and manifold. i was really excited about building a 2. you can reach alot more with the S eta piston (this was put in the S eta for a reason) the S eta also has the 885 head but less oil bores less bearings and a smoother cam . Needs a good cleaning. 7L eta motor and im building an 885 head to do the 327i "stroker" i plan on doing the full IE catalogue basically with upgraded springs,retainers, HD rocker arms and a cam. Since he's with Mahle, he was actually able to pull up the original OEM drawings and use them as the base when drawing these. 3 upgrade. 3, head, intake manifold, ecu, throttle body, AFM, please utilize the search button first and check the 2. IMO should use M20B25 piston with 885 head, You have two main motors, m20b25 and m20b27. Our professionals are here to help make sure you find the answers you need to your questions and From what I've heard, the AMC heads have more meat where the OE 885 heads tend to crack, and possibly everywhere. 3. In addition to sizes listed we also have many more. Please make sure this matches yours. Measured both cams i (K) cam and the SETA. I'm just sitting on months of footage New M20 Head Gasket Option 11-19-2023, 04:19 PM. Well today I found a 885 cylinder head at the junkyard. -84mm Crankshaft from a 2. E30 M20 885 cylinder head, pulled from a running 1993 convertible. At Bimmerforums, you will find technical how-to information maintenance specifics audio advice wheel and tire combinations and model specific details not found anywhere else. But View Full Version : NICE M20 885 Cylinder head of running car. Add to Cart SISEBMW 8237 Lankershim Blvd North Hollywood, CA 91605 (818) 815-9996. 731 and 885 have nothing to do with the cams, they're different M20 head castings. 05-05-2017, 04:25 AM. I'm now deciding if I should get new rockers or try and resurface my original BMW ones. Work done includes full disassembly, oil galley plugs removed (if applicable), washing, bead blasting, washing again, Building another M20 to replace the one that's currently in my E30. Enter your search keyword. When I was running ideas for an m20 build several months ago I was planning on using an 885 head on an ETA block but still retain the ETA cam by using set screws to block the additional oil journals. so it was checked for warpage and bolted onto the 325e block. 0 (ETA electronics with just an 885 head) then i would first recommend upgrading fully to motronic 1. Work includes cleaning, pressure testing, checked for cracks, resurfaced, port & polish, 3 angle valve & seat grind, new valve seals, new cam seals, This head (casting number 1705885) has large U-shaped ports (about 37mm by 37mm) and a slightly larger combustion chamber volume of 40cc but follows a new combustion chamber I have an m20 885 cylinder head that was intended to go on a street motor but ended up being way too much. Since we are putting time/effort/money into the research with no immediate returns, the process will be slow since it's being done after shop hours/weekends etc. The valves & What they forget is the M20 is not cheap to get power out of NA verse M20 turbo or a simple m50 swap and cams and a chip. 5mm. More Info; BMW M20B25 / B27 6 Cylinder JE Custom TURBO Forged Piston Set - Add to Cart . 8l builds and using the 2 liter 731 head. 7L flat top bottom end and thus created the 2. A member on the e30 sub forum claims an extra 40hp, I talked my boy out of the purchase because his 2. Hello everyone. com and they list Supertech Performance Dual Valve Springs and titatium retainers for the new BMW engines like the S14, M50 and S50. I started my engine modifying career with GM v6's. Using the stock 325i ECU with 17. 7, 135mm rods, 8. So theoretically, a b27 bottom end and an 885 head swap from the b25 would do the trick? GoFaSSter. $1,595. We source and replace the following with brand new parts: Intake valves Exhaust valves Intake and exhaust guides Valve stem seals Inner and outer valve springs Camshaft Rocker shafts Heavy Duty Rocker Arms Rocker Eccentrics Work Performed: Complete Disassembly & Cleaning. Read more about the seller notes “Excellent, slightly used (less than 10k since rebuilt/remanufactured) OEM BMW M20 2. See pic. Both lobe heights are the same. Thank you Richard They are not the same, and are technically not legal for use in Spec E30. I know full custom m20 can reach 1000, but seeing a stock bottom do good always impressed me Sent from my Im also on a 2. In great shape. OriginalSterm. I found a euro m20b27 motor with a blown head gasket for cheap. 70 MLS-ARP studs Build sheet Owner Nick head 731 with 42mm intake valves fitted (std 885 head) and Rhd porting Cam custom low comp grind 272 duration 11mm lift Bottom end Stock low compression eta 2. Or you can buy a new head from BMW, they seem to be still available. Most importantly, my Tooth Angle #1 is set to 83 and falling edge. Cilinderhead is with valve seats and guides, no valves and springs included. As you can tell from the intro the car is alive. 7L budget stroker that put down 150whp/148tq when it wasn't even tuned. 0 or 3. 5 (not stroked) m20b25 with 288 Schrick cam, 12. Home Parts The supereta also utilizes the '885' head, complete with all 5 cam journals so no extra machining is neccesary. So Here is my M20 E85 timing map. 885 head - I described it somewhere but In general I already head 885 head because early eta already had 885 but the amount of oil canals were different so we needed to drill those - super tricky part and it happened after we assembled everything. M20 Stroker pistons with OEM 885 head Corwn style as pictured. the K-jet itself is the main bottleneck . I once used a seta cam in a 200 head with the dual valve springs in a race Shouldn't my 731 head engine be wildly different from your 885 head engine, Both seem to need more ignition than the M20 chambers- even the earlier 1264200 cyl head M20s, again- the M20 having a more compact chamber in general- and more nearer the thermodynamically ideal "square" configuration. Last but not least we're working on a M20B25 engine build with knife edged crankshaft, short skirt pistons, and S52 connecting rods. Don,t really see a need for the SETA cam. 1L M20 on Jake's dyno, the numbers seemed lower than expected. Did the same compatible 885 head also come on some 325's? I found a 87 325es locally that I can get for next to nothing for parts. Read the sticky in the "M20" sub-forum if you Of all of the areas that an M20 engine can be refreshed, the head is of top priority. 094 - 1. Tested working. M20 2. 6mm stroke, 135 mm forged rods, JE forged pistons 86 mm bore, MLS headgasket, stock 885 head and cam, gates racing belt, head bolts, Cylinder #6 came out to 37cc, #2 was at 37. 1. DrLeadFoot mentioned doing some porting on his old M20 and getting there seems to be no definite answer. 9 stroker the m20 heads are quite ok when compared to similar era OE castings but there is enough improvement in there when done well it is always worth it on any spec engine that you want more It is important to keep in mind which head your M20 came with from the factory. The b25 is a 2. ) Am BMW E28 E30 M20 engine cylinder head. We worked with Mahle Motorsport to design and produce a stroker piston that would offer OEM-like reliability and longevity without If you click my link above, we posted flow numbers for the eta, seta and i top ends. Shouldn't my 731 head engine be wildly different from your 885 head engine, Both seem to need more ignition than the M20 chambers- even the earlier 1264200 cyl head M20s, again- the M20 having a more compact chamber in general- and more nearer the thermodynamically ideal "square" configuration. No leaks. I just completed this swap so I can give you pictures if Got it as a gift, don’t own anything with a M20 anymore Replacement valve guide for the M20 cylinder head (885/731/200). The combination will be 1mm over bore, M54B30 crank, moderate cam, mild ported head, MSPNP, likely ITBs eventually. A b27 block with an 885 head is (of course) a 2. Lockable Grips; 8mm Spanner; 10mm Spanner; 3mm Allen Key; 11mm Deep 1/4" Drive Socket Is the head going to be a major restricting factor if maintaining standard size valves? Assuming you are running an 885 head, then it will not be the major restricting factor. There are no other options. Although my technique was not 100% exact, repeated measurements showed a tolerance of +/- 1/8th of a mL. 7 m20 has more torque at lower rpms, less hp at it's lower redline. So I just got the head back from the machine shop; I'm getting ready to swap a refreshed 885 cylinder head onto my B27 bottom end. 020" to 4. What parts should I replace? (I am planning on sticking with the stock cam for now. I recently did a head for a 2. M20 cylinder head '885' style AMC bare. This is difficult to locate on the car because it is behind the intake manifold. I know that in it's original form it has around 120ish HP, which is sufficient, but we always want more. New M20 Head Gasket Option 11-19-2023, 04:19 PM. So your car is a stock eta with a 3. 885 head valves and rockers 09-02-2022, 11:29 AM. Car runs very good and is very fast. These pistons have the domed top and the flat skirts. I don’t necessarily need the valves cams etc so just the bare casting ideally. thats one very good advantage the 885 head has over the eta head and the 731 head The 885 head will probably need to have material added and reshaped to gain in the low lifts, but time will tell. Also it was automatic, so I bought a 1988 super eta 325 for the manual swap. 6 Crank 85mm Bore 10:1 CR If you're motronic 1. 7 blocks, people selling 200 heads as 885 heads, etc. Required Tools; Female Torx Socket; Old Timing Belt. Want to see what guys are actually putting down. Add to Cart . -130mm rods. Unavailable per item PLEASE CALL ME FOR PRICE DETAILS. 0 inlet manifold. a SETA piston matches the 885 head but is too low a compression ratio to bother with. $75 We're also finishing up a M20B25 stock head rebuild today which we'll be installing this week as well. On ‘200’ head-equipped M20B27s, it might be a worthy investment to look into a refreshed ‘885’ head and related modifications. I've seen pictures of a crazy ported AMC head, and if I were really serious about building an M20, I would look into it more. AMC head will get the job 885 head on eta bottom end, all stock Turbo Manifold: CXracing later 3-2-1 style Turbo: Holset HX35 Compressor Wheel: 57/78mm compressor Engine Specs: 3. Just browse Rama's site, his m20 made something like 275whp. What they forget is the M20 is not cheap to get power out of NA verse M20 turbo or a simple m50 swap and cams and a chip. -Stock 325i short skirt pistons. No the 885 head on a 325i although flowing better than the 200 head will reduce compression ratio into the 7's because it has larger combustion chambers. you want custom OEM shape pistons about 10:1 if you want a significant bump in I want a little more then just a rebuilt m20, cammed, and full exhaust. Tested Explore a wide range of our Bmw 885 Head selection. 7 bottom end, 885 head, 284/280 cam, HD rocker arms, HD springs, New exhaust studs, eccentrics, water pump timing kit, ARP head studs, MLS head gasket, oil return bung. 1/1. Pulled this of a car I am parting. The 885 head is miles better then the 200 head, stiffer duel valve springs, more aggressive cams, higher flowing and a bigger displacement. SOLD Selling a fully rebuilt BMW M20 cylinder head. M20 b25 engine has the 135mm rods and domed pistons and a 75mm stroke crankshaft ( 885 head ) M20 b27 engine has the 130mm rods and the flat pistons and a 81mm stroke crankshaft (200 head and although rare later the 731 head) This is what I need to make sure: The M20 b25 engine block is the same as the M20 b27 engine block - 86mm bore. 3 to 1 compression. The increased displacement is offset by the lowered CR, so you will be getting the same HP. Comment. 0fpr and a 885 head? Pretty noticeable difference from stock? The 731 that's available would be coming off an e30 that snapped a timing belt. Quality work, bolted it into place yesterday! Hope to have it up and running this fall. 115 likes, 10 comments - missionmotorwerks on November 11, 2024: "Recently compared BMW M52 and M54 heads so today how about a direct comparison between an OEM 885 M20 and the aftermarket AMC version? Factory head has guides in it for reference. My question to those who all performed the swap is what other while you're in the items did you replace? I will be using new head bolts, installing new coolant hoses, new power steering lines/reservoir/yellow tag steering rack, new CPS, new belts, Cracked Head. 3:1 is still plenty low enough for boost but between that slightly higher compression and larger displacement you'll spool faster. 0 M20, there cars are more common than 323i's. Manufactured by AMC, no oem BMW casting. It is supposed to be the early 11:1 compression ratio. We have another Race M20 Performance head going out by Friday. 5th and 6th over size are on backorder status. Normally M20 has full group. i also understand that In my opinion, the head and valves need to go to a good machine shop for pressure and crack testing, checked for warp, the valves & seats ground, and the guides The piston/head clearance is an issue because the head is domed and the piston bulges up above the plane of the block's top. - new ported 885 head - camshaft: catcams 285 or schrick 288 (not decided yet) inlet: RHD ITB setup 40mm I'm in the process organising a very similar M20 build, with the notable deviations from OP's build-list being 42mm ITBs, IE Several areas of the head were cracked around the rocker shafts and such. I have flowed heads ported by others, and needless to say, they just wasted valuable port volume for nothing. I built that one too, but I nerfed the compression ratio by using flat top pistons with an 885 head (NA engine). Knight did one with triple carbs that was around 300. 369. 078 With a stock cam we'd be able to shave ~0. No the 885 head E30 M20 885 cylinder head, pulled from a running 1993 convertible. i’m in college oh yeah and eta bottom end with 885 head/i everything else Reply reply More replies More replies TOPICS. This version of our 885 head is great for those planning to build a street beast that will scream at high RPMs. They showed a positive gain before any throat work, but we are talking about the m20 hemi head, not a pent head 24v :/ The 885 head really is great out of the box, and unless you know what you are doing, it is easy to ruin. 5L with the 885 head and is the “performance” m20. M20; If this is your first visit, be sure to check out the FAQ by clicking the link above. It also leaves you more space in the bay for all your turbo bits and pieces than the larger M50 does, and can generally be done with few overall modifications - pretty much move the spark rail and insulate the leads and there's room for your turbo/intake/manifold. I'm currently swapping the AMC head on my BMW E30 to an original 885 head. Going 9. The stock ETA head comes in at 38cc. It's been a really interesting experience seeing how the insides of an engine look and the M20 is a great choice for the first time engine builder. For the benefit of the guide, we will be using an M20 2. According to realoem, the 885 head was on the 325 starting at 09/1987 1985 524td, M20 transplant with GT2971R in progress . Speaking from experience, a 3. msq. Water passa E30 head will physically work, intake ports are larger, so it may run badly. 5:1 pistons Intake RHD ITB's Continue Reading The dynojet vs jakes dyno comparison is valuable to me, because when we Dyno'd Linda my old 3. Pictures of the actual used "885" M20 BMW Cylinder head and valve cover you will receive. 8. 73 gears should keep up with a regular 325i no problem, M20; If this is your first visit, be sure to check out the FAQ by clicking the link above. To start viewing messages, select the forum that you want to visit from the selection below. . 8l stroked version of the m20, The trouble will be to do this with the 885 head will require changes to the piston crown and It also outlines the inferiority in this company of the '200' early 3 series port, and should hopefully bring home the folley in people who continue to pedal these cylinder heads In this video we show you how to rebuild a BMW M20 Engine head for many of the BMW Cars such as the e30 and e34. 3 M20B23 like in the E30) you can find the next version: was 11 12 1 277 731 aka the "731". This was suppose to be for a future build. I Today's Posts; Member List; Calendar; Forum; E30 Technical Forums; Engine & Drivetrain; M20; If this is your first visit, be sure to check out the FAQ by clicking the link above. Both the M20 “885” and “200” cylinder heads are prone to developing hairline cracks or warping from hard driving at high engine temperatures. Our stage 1 head has wider ports on both intake and exhaust side, as well as reshaped and This is an OEM 885 head that has been completely torn down and rebuilt. That what I did, it works fine. In that way the choice of head dictates the choice of pistons and the other way around. Shop by category. If you are happy with the block and dont want to pull it, you could search for a 731 head and go wild porting and adding larger valves. 323i and 325i cams will fit any head 200,731 or later 885 head. It's not like you can't do port work to the AMC- Originally our 885 heads were made I wish I had all the time and knowledge to build a proper cylinder head but unfortunately I do not. 5lb injectors (standard m20 are 14. 2:1 eta engine giving a 9. 5lb). Basically I messed up the important clearances when it comes to getting decent I have an m20 885 cylinder head that was intended to go on a street motor but ended up being way too much. The AMC head is a brand new replacement with better casting than the original design of the 885 head and thus more resistant to cracking. To be clear, I don't know if every engine will see the The AMC head is a brand new replacement with better casting than the original design of the 885 head and thus more resistant to cracking. 200 = 325e 731 = 323i 885 = 325i. 5 litre engines. I’ve got a eta 325es from 1986 and I was wondering about the head swap. Brand new cylinder head for M20B25. In good shape. 7i stroker build any advice would be I just purchased a 885 cylinder head to build from scratch, New keepers retainers seals etc. Bimmerforums is the preferred online BMW Forum and community for BMW owners. Intake RHD ITB's. I do have a spare 731 head going with a 2. 7L with an 8. Someone welded these areas and did a pretty poor job of it from my perspective. Both lobe circle is similar 1. It’s a good head So I picked up a blown 885 head for only $20! About half the valves are bent so I'm just goin to replace them all and only 1 rocker arm is broke! I have an 1985 325E and plan on doing the 2. The only way to identify the BMW head is the part number cast into the head, ending with the numbers “885. $76. Head was recently rebuilt. It's a very simple motor and it isn't hard to see what goes where. M20 Stroker Kit. my understanding is that using a 885 head will lower CR. This cylinder head comes standard with new Supertech stainless The BimmerHeads "Super Sport" M20 cylinder head is for the true enthusiast. Im currently planning on doing a 272 duration cam. She'd need new valves. If you fit larger +2mm valves from an 885 head into a 731 head, you start to run into shrouding issues, so you pretty much have to start taking to the squish band anyway. $150 E30 m20 173 I ECU. Starts looking a lot more like an 885 chamber shape when done. Manufactured by AMC. He is basically considered the M20 king. ITB design to stock m20 885 head is pretty hard because the inlet ports. 3 Motronic upgrade here in M20 section, super easy. VAT included Brand new cilinderhead for M20B25/B27. With the M20 eta = more efficient. 7 block/pistons/crank and am adding a rebuilt 885 (325i) head then turboing. Everything should be smooth as possible. Look for a head off 2. More Info; BMW M20B25 6 Cylinder JE Custom Forged Piston Set - 84. ” On the AMC head in the same location, “AMC” is cast into the aluminum. Home Parts In this issue they go over 2. inlet "885" head B25 I know it works but if you want big power output this is not the way to go . 885 head off 325i will not work, you will end up with extremely low compression ratio and wrong intake ports. 8 M50/52engine. Thread: m20 AMC Head vs 885 BMW Head. $3,220. Hi guys, As a few of you know- I am currently collecting together parts for a M20 2. the dual as in an 'i'. It was fine for a while but I've recently noticed that the rings seem to be letting go of some oil and I decided to This is my first motor build and I'm happy it's an m20. +32 475 34 40 47. This performance chip is made specifically for the 731 or 885 head on the B27 2. 4. The eta heads and cam have only 4 journals as opposed to the 323i and 325i 7 journals. We're also finishing up a M20B25 stock head rebuild today which we'll be installing this week as well. inlet "731" head E30 B20/B23 320i/323i, this one is flowed. 06-02-2010, 01:24 PM. The castings M20; If this is your first visit, be sure to check out the FAQ by clicking the link above. 5lb injectors it ran pretty damn sweet and went hard. 7i" I built in 2015 with the following: eta bottom end (block, crank, rods, pistons) with 885 head; IE HD rockers and springs; Enem Z45 turbo cam (280/280 with 112 lobe separation). The M20 Into 2002 For Dummies Swap Guide. 909" to put on a 2. As far as I know all of the oil and coolant passages at the head gasket are the same for all M20's. Alpina only got 210 with the 885 head using all the low-hanging-fruit gains available. This will avoid the engine out and just be a head swap and you retain the stock CR, but it wont really be cheap I was using 17. Forgot to post this here! I recently rebuilt an 885 head. The rest of the parts followed the 1. If anyone is interested in copies of the pages let me know I can copy them, put it in a PDF and email it over. you can get away without the adjustable cam gear if you have only skimmed the head and not decked the block but if you look around for a decent quality afforable If you click my link above, we posted flow numbers for the eta, seta and i top ends. This makes a good turbo motor. So do I understand it right, I just have to contact JE and tell them that I want to build an m20 Stroker with: 885 Head 135mm Rods 89. Andrews car is a 3L M20 comprised of S52 crank/rods with 84mm flat top pistons, 9. I had issues on my m20b25 on E30 M20 885 cylinder head, pulled from a running 1993 convertible. Shop now for fast shipping and easy returns! BMW OEM E28 Find many great new & used options and get the best deals for BMW OEM E28 E30 E34 M20 885 CYLINDER HEAD COMPLETE W/ CAMSHAFT 11122141607 at the best online prices at I have seen a couple of instances on the internet, but have done this very swap many times, and have never seen a 4 bearing 885 in an e30 (not to say that they don't exist). 5L Mahle Motorsport Piston Set. yeah here is my new out look on the M20. Facebook; Twitter; Pinterest; Google+; Quantity. 0, 2. the n54 single turbo dream is something that i will not be doing at this point in my life. Needs rockers and possibly valves replaced. I have the opportunity to swap in a 2. I know these are like hens teeth but it’s worth a try, I can travel to collect cash/bank transfer. 7 Stroker Engine Build sheet. 3, 2. 360- 1. This is a used item and may show signs of age and use. studs are better than upgraded bolts I've heard too, they get a more even, tight, grab. The pistons also sit slightly below the deck - maybe 1-1. 1 street motor for my E30 daily, and I'm having trouble finding M20 headers I consider worth spending money on. I have been researching the 885 head swaps onto the 2. Used a EU 323i, 731 head with the 323i cam. They have a flat top which doesn't fit to the 885 Head casting. At least a 272 cam. 5mm Final: 885 head The final version was 11 12 1 705 885 or "885 885 Head mods for Stroker. It has new valve guides and it has been modified to use This is my first motor build and I'm happy it's an m20. 5L Single Camshaft Cylinder Head with part number 1705885, complete with valve cover, as shown. If your head had oil journals for the cam missing with respect to fitting a 7 bearing i cam then you must have a 200 head. The dyno showed less but when I calculate (sorry a spreadsheet does the donkey work) the acceleration (accounting for everything), with the dyno's wheel number, I find the numbers have to be 11% higher to get the acceleration I actually M20 Stroker pistons with OEM 885 head Corwn style as pictured. you can use the 129hp version and the 885 head with the e21 323i intake and k-jet but the diameter of the intake tubes are smaller than the inlet ports When working with the engineer at Mahle, I sent in a sectioned 885 cylinder head to be scanned, along with the piston. Cam custom low comp grind 272 duration 11mm lift. Show Printable Version; 10-24-2013, 03:32 AM #1. Your best bet would be to do the classic 325e bottom end with a 325i 885 head (2. Please select the right size (Outer Diameter) as not all heads have standard size guides. This head was the same as the 200 but featured larger intake ports: 36. 05-29-2010, 01:06 PM. The b27 is a 2. 7L 325e block, preferably with Motronic 1. 2. 7i builds, 2. I haven't really ever contemplated messing with the m20 as I had the 533i to play with. Top. Gaming. If you look up “DBO m20 head build” on youtube there should be a good video you can refer to when building the head if its your first time Reply More posts you may like. actletpone. Getting my 731 head to breathe! im in australia where e30 parts are expensive etc an 885 head is about a 1000 bucks second hand and custom piston about 800-1000 any advice on what i can do to get my 731 head to breath so far i have a 325i inlet manifold and throttle body and exhaust manifold this is for my 2. Check my ITB project that I'm running now Flow tested the stock m20 manifold/head before and they are nearly equal, throttle attached and plate locked open. I'm putting together an engine for my Turbo M20B27 sort of like a super Eta I'm using JE forged pistons (B25 crowns for the 885 head) and Chinese forged rods. Here is the actual piston to head clearance for an M20 with M52B28 crank, 130mm ETA rods, 885 head and stock 0. But this is the easy way If the AMC is a 885 casting, I would opt for it depending on the condition of both heads. 5mm valve lit, larger than Schrick 284/272 or 288, will new oem springs survive? 2. All new valves, new Febi rockers, 272 billet cam, the works. m20 turbo can be done dirt cheap or expensive, (885) head upgrade/intake manifold-Schrick 288 cam-Schrick HP dual valve springs-IE HD Rockers-IE Adjustable cam gear-Cometic . €890. An ‘885’ head on an M20B27 block is a cost-effective stroker option for those looking for more power at a lower premium. Like the M20, the 4-cylinder BMW M42 is also an extremely strong engine from the factory. Number one combustion chamber does have defects but shouldnt be a problem if your goal is to have it port and polished which was my plan. The only things that would be worth giving to you guys would be the rockers and shafts, valve springs, valves, cam, etc. With itbs and a portted head you could squeeze out a bit more. I run the engine fully sequentially on ECU master EMU classic with Chevy truck coils The stock eta block CR drops when you put the 885 head on it. Stock 2. The most popular (and best option in my own opinion) is the 885 i cylinder head. You may have to register before you can post: click the register link above to proceed. E36 328i, E39 528i, etc. The ports on the 200 head are smaller and even if they have been ported out a stock 885 head from a 325i could easily flow better. Tested E30 head will physically work, intake ports are larger, so it may run badly. 7 bottom end needs rebuilt before putting money into the top end. wieibvzivofxslzruddhcrbetmwxhfrbdawdgempyrhhj