PDA

View Full Version : Need help: E30 M52 project


Tyman
02-21-2012, 05:36 PM
1989 325i
M52 with ZF 5 Speed

Im completely new to all this and i was wondering if anyone can help me with what im going to need to do for this project

cormier
02-21-2012, 06:01 PM
This has been covered tons of times

Read these

http://www.e30tech.com/forum/showthread.php?p=844667#post844667

http://www.e30dohc.com/wiki/index.php?title=DOHC_Swap_Basics

More info? What do you have so far?

Tyman
02-22-2012, 12:17 PM
i dont have it yet, i want to look into it to see what the work is and if im going to be able to do it before i buy it, but the one im looking at is a complete e30 325i without motor and trans, it comes with an m52 with zf trans, e34 oil pan and wiring harness, doesnt come with an ecu

egye30
02-24-2012, 05:57 AM
I know the car you're talking about.. It all depends on what you want to do, do you want to keep the motor OBDII (which is what i'm doing cuz i've got a donor) or you can convert it to OBD-I like "cormier" is doing to his S motor. But you'll most likely need a wiring adapter or make your own, an e36 328 drive shaft if you're using the zf, e28 motor mounts or the custom made poly. ones they sell for the swap, low ratio diff for that zf, and smaller brake booster (e30ix, e21, Porsche 944 etc..) or you'll need to move the stock one over and go through a bunch of BS to make the motor fit, e34 525 M50 throttle cable (some people use thier stock ones, seem to get mixed opinions about this). You'll also need all the sensors for the motor either obd1 or obd2 depending on what you go with. If you go obd1 you'll need a bunch of obd1 parts and sensors to convert your motor like fuel rail, MAF, throttle body and what not (cormier can list those for you) and you'll need a 413 red label DME i believe, again not sure if you'll need an EWS delete chip or not cormier or someone else can confirm that. If you go OBDII you'll need the obdII sensors, and you'll need the OBDII DME, you'll also need to flash/tune to delete EWS, the extra O2 sensors and all the annoying obd2 extras. That should cover the basics, just what i can think of off the top of my head, any body can feel free to add on to it or correct me. You've also gotta keep in mind that the m52 will add a little extra strain on the suspension (+60lbs weight and a lot more torque :P) so you're gonna want to upgrade OEM suspension to get her handling properly, also you'll want to add some more stopping power, maybe upgrade the exhaust.. those are all things you want to keep in mind when doing the swap, specially when you'll have the car gutted already, it's usually a good time to get at some of these things. Good Luck! *wave*

Tyman
02-24-2012, 05:03 PM
thanks do you know where i can pick up some of the parts needed for this?

cormier
02-24-2012, 09:15 PM
It all depends on what you want to do...

Wow what a monster knowledge post that's a pretty thorough list!

Parts vary, you really want to make up a list of exactly what you need based on taking a look at what's included/not. Then once you know what pieces are missing, find out which brand or whatever you want, and start looking around. There's a few supporting vendors (rebirth, Eurostyle) that may have some. Otherwise, eBay, r3vlimited, bimmerforums, classifieds on here are great places for used parts. For new parts there are lots of aftermarket sites (turner, vac, pelican, treehouse, akg, bavauto, etc) that specialize in bmws. Of course, for most things OEM, mike@maranello takes care of us well.

Big decisions to be made before buying parts. Is your wiring stock (obd2?) do you have any desire to do obd1 conversion, or manifold, or any other bolt ons? Motor have accessories? What does the shell need?

There is another m52 for sale as well on the classifieds, from a great e30 that may be worth looking into if the stuff that comes with your shell isn't complete.

http://www.maxbimmer.com/forums/showthread.php?t=148431

frankie591
02-24-2012, 09:58 PM
read the monster 100+ page thread on r3v under the dohc 24v swap subforum. Almost every question you could possibly have is answered within, so even though it'll take you hours to read through, its worth it.

El Gato Liso
02-25-2012, 07:24 PM
i don't like that r3v thread. it helped a lot, but it didn't tell me everything i needed to know. that thread needs to go, and just have one huge sticky

cormier
02-25-2012, 09:36 PM
i don't like that r3v thread. it helped a lot, but it didn't tell me everything i needed to know. that thread needs to go, and just have one huge sticky

Agreed, informative but hard to break into sections. It would be a great project for someone to compile into notes, add some more specifics and publish it together

http://www.r3vlimited.com/board/forumdisplay.php?f=129

The thread is the 83 page sticky there

matty.dc
02-26-2012, 12:27 PM
Parts I used (M50NV)
- 92 m50nv (i know yours is an m52)
-E34 m50 oil pan, dipstick and tube
- VW Golf MKII brake booster
- e28 535i motor mounts
- e36 rad or 88+ e30 rad and overflow bottle
- you need, I believe an m3 drive shaft

Tyman
02-26-2012, 01:14 PM
i thought you could use the stock e30 motor mounts, and a drive shaft from a e36 328

cormier
02-26-2012, 01:39 PM
i thought you could use the stock e30 motor mounts, and a drive shaft from a e36 328

Negative on the motor mounts. E34 m5/525i with modification and e36 arms. There are also specific swap mounts by akg, revshift, etc.

Driveshaft depends on the tranny. There's tons of variety-- read the wiki some info in there. Find out the length that you want, and make sure the one you get is that length

matty.dc
02-26-2012, 02:15 PM
Like stated above there are so many ways to do it. I used my getrag 260 with a 5mm shaved flywheel and all of my stock drivetrain.

egye30
02-27-2012, 04:34 AM
Negative on the motor mounts. E34 m5/525i with modification and e36 arms. There are also specific swap mounts by akg, revshift, etc.

Driveshaft depends on the tranny. There's tons of variety-- read the wiki some info in there. Find out the length that you want, and make sure the one you get is that length

You sure its the e34 mounts we're supposed to use, i could've swore they were e28 535 / M5 mounts.. i could be wrong..
nonetheless those are the ones i ordered for my swap http://www.r3vlimited.com/board/showthread.php?t=230154. you're also going to want to use the drive shaft that came with that tranny, referring to the wiki link posted above, The ZF 310 and 320 both have a 96 mm BCD output flanges, you're gonna want a drive shaft to match those outputs, the site also states "The E30 M3, 6/86+ E30 325e, 96+ E36 M3, 96+ E36 328i, and E36 328is have 96 mm bolt circle diameter (BCD) input flanges on their driveshafts. The E30 325i, <6/86 325e, and E36 325i have 78 mm bolt circle diameter input flanges on their driveshafts."... So pretty much you use the driveshafts from.. E30 M3, 96+ M3, E36 328 (not 325), or Eta's made after 6/86.. and you'll wanna the E30 center support mounted backwards on the E36 drive shafts according to other sources..

El Gato Liso
02-27-2012, 05:02 AM
You sure its the e34 mounts we're supposed to use, i could've swore they were e28 535 / M5 mounts.. i could be wrong..
nonetheless those are the ones i ordered for my swap http://www.r3vlimited.com/board/showthread.php?t=230154. you're also going to want to use the drive shaft that came with that tranny, referring to the wiki link posted above, The ZF 310 and 320 both have a 96 mm BCD output flanges, you're gonna want a drive shaft to match those outputs, the site also states "The E30 M3, 6/86+ E30 325e, 96+ E36 M3, 96+ E36 328i, and E36 328is have 96 mm bolt circle diameter (BCD) input flanges on their driveshafts. The E30 325i, <6/86 325e, and E36 325i have 78 mm bolt circle diameter input flanges on their driveshafts."... So pretty much you use the driveshafts from.. E30 M3, 96+ M3, E36 328 (not 325), or Eta's made after 6/86.. and you'll wanna the E30 center support mounted backwards on the E36 drive shafts according to other sources..


nah you're right. those mounts are literally plug and play...just need to be installed backwards!
and with the ZF tranny, im :confused:pretty:confused: sure that you must use an automatic 328i driveshaft.

cormier
02-27-2012, 07:02 AM
Oooops! E28 mounts FTW! Lmao

For ZF you want 96+ 328i/is or 96+ m3 -- if I remember correctly an 87-88 325e will work, but you'd have to check. Must be a manual driveshaft. Must have 4 bolt rear flanges to mate with your diff. Let me find the length for you.

Edit: 1492mm is what you're looking for. Call Eurostyle, he generally has these. Pics of mine vs. stock 318 DS

http://i913.photobucket.com/albums/ac334/84e30/84%20318%20S52%20Swap/IMG_9045.jpg

http://i913.photobucket.com/albums/ac334/84e30/84%20318%20S52%20Swap/IMG_9046.jpg

Tyman
03-04-2012, 01:09 AM
thanks guys for all the help. hopefully i can get this project up and running soon

voluted
03-05-2012, 10:34 PM
I would recommend against the use of the above posted mounts. Here's what my exhaust side looked like after about a year (the mount heat shield was in place):
109090
109091
Both of those mounts were the same height when new.

They started deforming like that after only a few months of use. I put those bolts in the gap to prevent it from compressing even more because my exhaust starting hitting the sub frame, and my oil pan starting hitting my steering rack.

The replacements I used were e32 740i engine mounts:
http://s3.amazonaws.com/fcp-product-photography-us/public/assets/products/38286/large/EngineMountKit.jpg?1310409060
BMW #s: 11811094149 and 11811094150 (Left and right)

The OEM units are hydraulic fluid filled mounts and the aftermarket units are usually solid rubber. The smaller threaded rod sticking out on the bottom of the mount needed to be cut off and the small alignment nub also needed to be ground down.

They have been installed since September last year and are still within 1mm of their original height when new (I checked them last week).

My Setup:
Car: 1991 318iS
Engine: M50B25TU from '95 325i convertible
Wiring: Home made engine>body adapter made using electrical diagrams, stock e30 m42 engine wiring harness cover slightly trimmed
Oil Pan: e34 M50 pan, pickup tube, and dipstick
Transmission + Clutch: G240, 14lb m20 flywheel with HD OEM m20 clutch kit
Shift linkage: e36 328i with shortened+weighted selector rod and B&M short shifter
Rear Axle: 3.91 medium case viscous LSD from e30iX
Driveshaft: e36 325i MT
Engine mounts: e34/e32/e31 v8 with e36 engine mount arms
Trans mounts: e23 735i auto
Booster/MC: Both from e30 325ix
Cooling: Stock m42 rad, no clutch fan, AUX fan set to turn on @ 99deg C (only turns on sitting in stop-n-go in the summer for more than 10 minutes) or manually with A/C switch, 88deg C thermostat in aluminum housing, M50 temp sensor replaced with e30 m20 unit
Exhaust: eBay 'shorty' headers hooked up to stock obd1 midsection (with modified passenger downpipe) to stock e36 325i muffler (modified for sound, not fitment)
Intake: 3" long coupler mounted to MAF with 3"i.d. cone filter inside a home made heatshield
Power Steering: e30/e36 PS fluid reservoir mounted in stock e36 location (on driver's side engine mount arm)
*Edit* Fuel System: Stock e30 318is fuel tank and lines, Walbro 190 LPH pump (it's loud) mounted to the OEM assembly.

The swap was done late may of 2010 and is has been daily driven since. I can't think of anything else related specifically to the swap at the moment, but feel free to PM me if you have a question.