M42 Turbo

[Hijo]

So I'm thinking turbo'ing an M42 engine. The only concern I have is the mileage of the car. Its about to hit 200k. I'm thinking about buying all the required parts to make this happen; when the engine its self gives out. Ill look into buying a rebuilt M42. Any opinions about the millage? How long do you think the engine will last with about 8 psi going into it. Will be looking for a clutch that could last the beating before the mods.

I'm here to learn not to get criticized by Bavarian Nazi's! :nice:

[shameson]

If you really want to do this you should just rebuild it yourself, you're going to want to make sure it's set up to accept it. Personally if you want to run boost the m50 or m30 would be better platforms.

Best get in contact with Dj Buttchug on here, he did a boosted m42. Check out his build thread

[einhander]

OP, you lazy.

There is a whole forum with this info.

[wazzu70]

If you really want to do this you should just rebuild it yourself, you're going to want to make sure it's set up to accept it. Personally if you want to run boost the m50 or m30 would be better platforms.

Best get in contact with Dj Buttchug on here, he did a boosted m42. Check out his build thread

Why would the M50 or M30 be a better platform for boost? The M42 is just fine and there are many M42 turbos out there.

[shameson]

The m42 is fine, I mean I have one in my car. I would love to have it turbo'd but personally if I wanted more power, even just a NA 24v can make just as much power, with a smoother power curve. Strictly personal preference.

There is a lot of info out there for m42 turbo setups. I've even seen a guy running stock internals at around ~8 psi and was still making good power. Make sure you absolutely replace the head bolts, factory bolts aren't meant for boost. And don't don't buy cheap Chinese turbo.

Check this thread-> http://www.r3vlimited.com/board/showthread.php?t=224803

Has all the information I think you'll need. Some members were making custom manifolds and engine management that you might be interested in. Ok I'm done, you're on your own OP

[TobyB]

Read Corky Bell's book. It's cunningly entitled 'Turbocharging'.

8 psi really doesn't stress the engine any more than N/A
as long as it's done right

M42 on boost sounds like fun to me... one of these years...

t

[kwill22]

Lol. I had plans on buying another M42 and building it and boosting but that got out in the back burner when I found out my wife was pregnant.
I am happy for the baby though.

[jntar]

Take your budget and be prepared to double it. At minimum I strongly recommend refreshing the motor. I got around 6 months of hard driving on mine and now am having to address some issues I should have done in the beginning. My car has over 230k miles.

[Hijo]

Take your budget and be prepared to double it. At minimum I strongly recommend refreshing the motor. I got around 6 months of hard driving on mine and now am having to address some issues I should have done in the beginning. My car has over 230k miles.

Your M42 build is crazy nice! Just got some motivation on my'n upcoming build! :D

[brads2002]

I have Jakes kit and 175K on my car. So far so good at 9psi. I would go that route and save the hassle of putting all the parts together. I did do a lot of other stuff at the same time to try and keep it reliable. New fuel hoses, coolant hoses, VC gasket, vac lines. It seems like if you get a good M42 they run for a long time.

[Esprit]

We inverted the stock header (cost=0) and used a 1992 Saab 900 turbo and intercooler from a parts car we had. With 24# injectors it runs 8psi on the street and track with no problems for 4 years. The engine had 138K miles when we began and now has approx. 180K.

[Esprit]

YouTube video of the car running at Watkins Glen in the Zone 1 PCA 48 hours June 7-8.

http://youtu.be/v4OqSTFPcmk

Mitch will be running in the Reisentoter Region PCA event on July 25-27. Once again at Watkins.

The car now has a 6 point Safety Devices cage, Momo racing seats and harnesses. We will post a link if we get more video.

[MikeW]

Jake's Turbo kit in my 1991 318i:



I could not be more happy with the Kit and I don't think Jake ever took longer than twenty minutes answering my emails, and there were many! Installation was a breeze had I not been such an idiot.

[varg]

How much boost, MikeW? And what turbo?

[MikeW]

9 psi


Compressor trim: .42ar
Compressor Wheel diameter: 43.20 / 60.41
Turbine Wheel diameter: 45.74 / 62.86
Exhaust Trim: .48ar


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