M42 Turbo - Scandinavian style

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23732
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Mon Nov 16, 2015 10:51 am

Hello from Norway. Here I will keep some kind of log/build thread of my forced induction project. M42 turbo!

I chose the M42 because of the weight, weightdistribution and the potential.

The goal is around 400-450whp.

The parts I am going to use is:

- Stock M42 block with o-rings in the block. M50 crankbearings, and new bearings/gaskets on the whole engine.
- M42 head with grinded valves, ported intake/exhaust canals, with reinforced M50 valve-springs, stock headgasket and VAG lifters. I am thinking about a revlimit on 7500rpm.
- Lathed pistons down to 7.3:1 compression
- M20 flywheel, with 618-pressureplate and Sachs raceplate, springless.
- VEMS standalone ECU with Electromotive singlecoils.
- Garrett T3/T4e, 50trim turbo
- E36 325i aluminum radiator

Thats all I can think of at the moment. Pictures will come soon.

The engine has been disassembled and the block has been painted. After it has been o-ringed I am going to hone it.

At the moment I am calculating how much the pistons has to be lathed to lower the compession down to 7.3:1. The engine has to handle around 36-38psi of boost.

You guys can ask me questions in this thread if you want, and I'll try to answer as best as I can.
rix313
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Mon Nov 16, 2015 8:12 pm

Look forward to seeing it come together :)
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23732
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Tue Nov 17, 2015 9:05 pm

M54 pistons and turbo is ordered. As the original post states, I bought a Garret T3/T4e, with 0.78A/R and twin-scroll exhaust housing and 4" antisurge compressorhousing. Also, some pictures of the block, the car it is going into, the head (all intake valves are grinded, only exhaust left), new sparkplugs, the headparts with new lifters on the top and old lifter at the bottom and the oil filter cap my brother machined for me.

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