M42 turbo fact thread

[Peattie]

^^Best investment you'll make.




Youre selling your m20 turbo and going m42 turbo?


http://www.r3vlimited.com/board/showthread.php?t=294941

Yeah I want a late model two door and Im trading a guy that has a 91 318is. motor will need work but pretty much everything else on the car is new. So looks like turbo m42 for me.

Plus there arent many m42 turbos and I like being different. Kinda like I'm the only one not running a front bumper lol

[MF DOOM]

^^Best investment you'll make.

one of these days I'll be joining you guys..if my car ever sells lol

Youre selling your m20 turbo and going m42 turbo?

http://www.r3vlimited.com/board/showthread.php?t=294941

[willworkfore30s]

A megasquirt V2 unit popped up in my local e30 group last night for $250 with the trigger wheel and harness. I haven't gotten around to doing my research on engine management but I didn't want to miss out on a good deal. I got a rough idea of what they go for and decided that was probably decent.

Anyway, looks like I'll be going standalone. I've got a lot of research to do.

[wazzu70]

I have been watching that motor for a long time too :)

I got an English to Swedish dictionary just so I could read some of the threads! Thats dedication!!!

[strypt]

This is his build thread at PPF:

http://server.pure-pf.com/phpBB/viewtopic.php?f=2&t=5511

Basically fully forged bottom end, still original crank but 85 mm bore. 9.0:1 CR, custom cams, ported head, S50 ITB's, Precision 5862 @ 2.1 bar boost and E85.

[Victell]

By the way, I guess this is the current leader in M42 power?

http://www.youtube.com/watch?v=a2vmvrILegc&feature=youtu.be

What is going on in his m42? Not sure what components he's using

http://www.microsofttranslator.com/bv.aspx?from=&to=en&a=http%3A%2F%2Fserver.pure-pf.com%2FphpBB%2Fviewtopic.php%3Ff%3D2%26t%3D5511%26sid%3D60f026e01050d8d3de16e90c388bb52e%26start%3D255

[Peattie]

one of these days I'll be joining you guys..if my car ever sells lol

[wazzu70]

Thanks for the info! I guess I could just do as you have done and expose more of the splines on the driveshaft if I have to. I could weld extension tabs to the CSB to move it forward.

Bonjes car is the one that got me interested in the M42 for a turbo motor.

[strypt]

Correct length - No
Usable length - Yes. M3E30 or 328 E36 will work albeit with only ~20 mm spline engagement. This is only true if you are using the 188 diff as the nose on that diff is longer than the 168 originally fitted to the 318. I wouldn't use this driveshaft if I were to dragrace my car but for street and trackdays it works fine. This is what I have been using the last couple of years and it is also what Bonje is using. Although his car havent been used much.

By the way, I guess this is the current leader in M42 power?

http://www.youtube.com/watch?v=a2vmvrILegc&feature=youtu.be

[wazzu70]

Oups, I missed this one, sorry.
The ZF transmission you want to use is called S5D 320Z. AFAIK the 328 E36 driveshaft is a little bit shorter than 318is but the output flange on the ZF is bigger so that's why you need it. It bolts up to all E30 differentials. M3E36 US-version probably fits aswell unless they are using a CV-joint to the diff like the M3E36 Euro?

FWIW, with either ZF320 or G250 no E30 or E36 driveline is the correct length.

The G250 is the closest to fitting with the E30 M42 driveshaft. You have to use spacers in the trans flange though to reduce the hole size from 12mm to 10mm. The driveshaft is a bit too long, but apparently some people have made it fit. I removed the adjustment nut and choked the driveshaft all the way up, but it still didnt fit for me length wise.

I have a ZF in there now, but the 87 eta driveshaft with the bigger flange is too short and I need to send it out to be lengthened.

Just a heads up for anyone who is interested in fitting one of the E36 transmissions.

[willworkfore30s]

I wasnt referring to a kit. As far as i know Jakes kit is the first for m42. Just saying that not many people upgrade their m42. I only know of Otis(goodntight) that will build you a manifold and vac can build you one. I believe vac reproduces the 666 fab design. both are single scroll.

Just got off the phone with Jim from MM and got some info on his cams and lifters. He explained their lifters are shimmed to about 8psi over stock oil pressure so they will take 8000rpm. Cams are 258˚ 11.15mm lift. Cams are $550 a piece with a $250 core charge. I asked if he would do a group buy and he said he would go down a little in price if i had a few people. Wouldnt be that much but saving money is saving money. However, He did say he doesnt recommend using them without MM valve springs because of seat to nose pressure ratio. Their design has very little nose pressure compared to shrick, catcams, etc. He explained all the testing theyve done over the years and said that he feels they are most advanced when it comes to cams. They no longer use the beehive by the way. Switched to a dual spring.

That man is full of information.

He also said he prefers the m42 over the e36 m3 and talked about how fat bmws are now and how fun the e30 is.

I have also been in contact with VAC about cams and their supposed to be emailing me all the specs and a quote for them. Ill post those when i get them.

Would love to help you get a lower price by joining your group buy but there is no way I can spend $1200 on the top end alone right now. That would go a long way to a low pressure turbo set up. I did luck across a wrecked car for $550 with a 10k mile drivetrain in it so that will help me get a jump start by avoiding rebuild time and costs. I will probably just start with a low pressure set up on a basically stock motor as a base and build it as I get money.

[strypt]

Thank you strypt. Looks like I might be tearing her down completely..

So just to make sure i dont screw this up, e36 328/m3 zf transmission. Is there a model name for it? like g240, g260, etc. That with an m20 flywheel, clutch and pressure plate. 323i TOB.

Is the 328 e36 driveshaft longer and does it bolt up to our differential?

EDIT: did some research and found that the 318 TOB and 325 TOB are both 1-15/16". trying to find an m20 flywheel to test on it.

Oups, I missed this one, sorry.
The ZF transmission you want to use is called S5D 320Z. AFAIK the 328 E36 driveshaft is a little bit shorter than 318is but the output flange on the ZF is bigger so that's why you need it. It bolts up to all E30 differentials. M3E36 US-version probably fits aswell unless they are using a CV-joint to the diff like the M3E36 Euro?

[MF DOOM]

.

[MF DOOM]

I didn't mean does anyone produce a kit. I mean has anyone built a twin scroll m42 that I might could glean some knowledge from. I have done some research on it and it seems like the m42 could be a great candidate for it. Quick spooling and power in the lower rpm range is what the m42 is severely lacking.

I wasnt referring to a kit. As far as i know Jakes kit is the first for m42. Just saying that not many people upgrade their m42. I only know of Otis(goodntight) that will build you a manifold and vac can build you one. I believe vac reproduces the 666 fab design. both are single scroll.

Just got off the phone with Jim from MM and got some info on his cams and lifters. He explained their lifters are shimmed to about 8psi over stock oil pressure so they will take 8000rpm. Cams are 258˚ 11.15mm lift. Cams are $550 a piece with a $250 core charge. I asked if he would do a group buy and he said he would go down a little in price if i had a few people. Wouldnt be that much but saving money is saving money. However, He did say he doesnt recommend using them without MM valve springs because of seat to nose pressure ratio. Their design has very little nose pressure compared to shrick, catcams, etc. He explained all the testing theyve done over the years and said that he feels they are most advanced when it comes to cams. They no longer use the beehive by the way. Switched to a dual spring.

That man is full of information.

He also said he prefers the m42 over the e36 m3 and talked about how fat bmws are now and how fun the e30 is. :nice:

I have also been in contact with VAC about cams and their supposed to be emailing me all the specs and a quote for them. Ill post those when i get them.

[wazzu70]

this

Im running a gt2871rs Garret BB turbo from an S15 Sr20det. It begins building boost at 2300 rpm

Great info!