M42 build questions

[Artem]

I will be tearing an M42 apart soon as I would have gotten one from someone in the area. I want to do a complete rebuild, but I was thinking - if i am in there, why not make it produce a bit more power? What would you guys recommend? I dont have much experience with the BMW 4-bangers...

I could do an SC or a turbocharger setup, or just leave it NA and run a different set of cams/crank, and would the two cases be any different?

Thank you all.

-Artem

[Bill-B]

Downing Atlanta makes a kick ass supercharger good for 197 rwhp

[euroshark]

Replace the M42 with an M30

[sumyungguy]

Have you been to m42club.com?

You will find what you need there, just look around a bit.

[Artem]

I dont want to do a swap - thats the thing, I have an M50 lying around - but a rebuild would be far too expensive. M42's are easier to make anything on I feel. I wnat a nice, lightweight motor that produces a crapload of power.

-Artem

[Artem]

Yea, Im a member there too :) (m42club)

[sumyungguy]

I dont want to do a swap - thats the thing, I have an M50 lying around - but a rebuild would be far too expensive. M42's are easier to make anything on I feel. I wnat a nice, lightweight motor that produces a crapload of power.

-Artem

Boost is the way to go then. Stock compression and cams with a GT28RS..

or the .70 trim on the left (thats a GT28R on the right)

[frost_dxb]

Im doing the same project M42B21 and will be starting soon as all parts are in:

S50 pistons - $100
M52 Rods - $80
M47 Crank - $750 (brand new)
Shrick Cams - $300
M50 Flywheel - $100

it has been done before and claimed to get 185HP at the crank