M42 turbo fact thread

[MF DOOM]

:D oh yes. post engine specs as well

[e30guydownunder]

I have all mine ported directly into the base of the manifold, separately. But 666Fab manifold was very easy to drill and tap :D

I'm booked into dyno Saturday, stay tuned for complete pics and vids!

Here is a teaser

[MF DOOM]

Heres one. Vacuum lines. How are you guys routing yours? Last time I drove the car it sounded like I had some compressor surge and noticed some excessive shaft play on the old turbo. I dont know if its my bov thats bad or if its my vacuum routing. I plan on testing the bov next time I have some spare time to work on the car and ill grab some flicks of my vacuum lines

[Northern]

Mahle provent.

[Dj Buttchug]

That's what I was thinking about doing in the mean time. I know when I pull off the breather hose hose there is a fair amount of oil in the hose. I assume that there is no problem for this small amount of oil to go through the turbo?

Even tho you have some residual in the hose its probably not enough to even make it all the way through the hose into the turbo. But then again you could do a catch can setup inline to stop that.

If It were me I wouldnt want oil going into my turbo but my case is different than most. my engine is brand new and my crankcase vent is bone dry and as clean as it was the day i started the engine.

[Leon T. Trout]

im running no catch can routing my crankcase vent directly to my turbo intake.

That's what I was thinking about doing in the mean time. I know when I pull off the breather hose hose there is a fair amount of oil in the hose. I assume that there is no problem for this small amount of oil to go through the turbo?

[Dj Buttchug]

im running no catch can routing my crankcase vent directly to my turbo intake.

[Leon T. Trout]

I read somewhere that having negative pressure on the valve cover/ crankcase was a good thing which makes me thing that having a sealed catch can connected to the valve cover and before the turbo would be a good thing.

[MF DOOM]

to tha flo.

I have a catch can that i may install someday..

[e30guydownunder]

I'm going to run 2 -10 lines off the rocker cover into a 2l catch can with a breather.

[Leon T. Trout]

What is everyone doing about the crank case vent? Catch can? Breather filter?

[wazzu70]

Shouldn't be an issue. Get ARP head studs and an MLS if you want to drop compression.

[ccsdo5]

Hey guys! So I have a 1988 325ix now that I'm fixing/ daily driving. But I'm looking for a 318is that needs work because I wanna build it from the ground up and turbocharge it. Even though I don't have one yet, what do you guys think would it be possible to push 250-300 whp with a M42 if I fully rebuild it and what not.

Just kinda looking into this and wanting to get information from others that have done it.

[Peattie]

I need to fix the bottom end first. lol .

[MF DOOM]

Buy my head and injectors! Ill make you a deal Pretty stoked to hear you're going m42.