M42 turbo fact thread

[e30guydownunder]

When you say the clutch isn't fully engaging are you saying the clutch seems to be slipping?

There is basically a difference of 10mm between the bellhousing depths and all the clutch arrangement, which would suggest that putting the spacer behind the flywheel will make the problem worse.

However the centre spigot position is changing from 25.6mm to 4.5mm. This will just change the position of the clutch on the input shaft and as long as the spigot doesn't bottom out on the spigot bearing should be fine.

Are you also running the 323i TOB? Maybe a standard one would assist if you are.

[MF DOOM]

going from top to bottom on your drawing. i measured in inches and am converting to mm

g260-g240

160-162
161.5-174.6
157-149
26-31.75
80-82.5
126.5-130

[e30guydownunder]

G260 out of an '85 323i

[e30guydownunder]

Yeah I can do that, I'll take a look after lunch

[MF DOOM]

Is your g260 in a place that you can get a measurement? I just dont want to tear mine out again unless i absolutely have to. ill grab a 240 and get some measurements.

[e30guydownunder]

Yeah same deal for me. Because I have rotated the engine I used the standard gearbox cross member :)

Looks like a bearing cage.

Have you still got a G240? measure the relative depths of each and determine whether there is a difference. That should answer your question.

[MF DOOM]

All the major bolts lined up. I had to drill two holes in my sump for the smaller bolts but that was no big deal. And i built a trans mount that looks exactly like the one the guy sells for 24v swaps. not sure if his will work but it looks close.

that little piece im holding in the first picture did all the damage if you can believe that.. it looked like it bounced around inside there until it balled up and got stuck in the pp.

My clutch setup is a jb m42 flywheel with the spacer behind it and the rest is all 325i stuff. Maybe i should get a 323i tob?

[Dj Buttchug]

a g260 will bolt up to m42.

[e30guydownunder]

That is a nice looking build strypt.

MF DOOM, the compact boys have been running the 328i / M3 ZF trans as it all bolts together in the compact / driveshaft etc. They have been running M20 clutch setups also and it all works.

I had a 323i flywheel on my M42 when NA and was running the 3mm spacer behind the flywheel with a standard 325i clutch and it worked perfectly. Looks like the springs on your clutch plate have been rubbing against the flywheel, did you have the plate in the right way?

What is the setup exactly? All 325i stuff?

I am using my 323i flywheel setup again, but with a custom 325i pressure plate (stiffer springs for more clamp) on a 5 puck clutch plate. But essentially it is a 325i clutch setup on the 323i flywheel, so same as last time.

I am also going to run a G260 and as far as I am aware it will all bolt together and work, b ut obviously I haven't run the setup yet.

With your G260 did all the bellhousing bolts line up? because the small ones around the bottom didn't line up with the E36 sump setup I am running.

[MF DOOM]

Looks really good strypt.


E30guydownunder, what are you guys using for trans over there? Im still having issues with my g260.. put the spacer behind the flywheel last night and it still seems to be acting the same. Like it never fully engages.. Found this bullshit when i yanked the flywheel out...





pretty stoked on that..

[strypt]

Nice to see more turboed M42's around the world. The little engine really is underrated IMHO.
This is my track toy




This is at the rear wheels on a Dynapack.


I've just finished building my M42 v.2.0 which is M47 crank, forged rods, pistons, o-ringed block and ARP head studs. Hopefully it will be up and running within the next couple of months :D

[MF DOOM]

Is your car running right now? I know ive seen you doing some changes to it lately but if its running i wouldnt mind seeing it before i leave. I fly out of sd the 10th

[Dj Buttchug]

^ and he goes back to m42! this is great news. glad to see the elite boosted crew posting up in here.

e30guy. good luck with the build man. im in for some progress!!

[e30guydownunder]

Engine is still at the machinist. I'm getting ready to get the turbo stuff ceramic coated and have been doing some work on the fuel system. Should hear form the CNC guy about the inlet runner design this week.

My engine only has hydraulic lifters. So 7500 is the planned Rpm limit. Ben is revving his engine to 8200 but he has aftermarket conrods and a solid lifter conversion.

[MF DOOM]

What are you revving to? Any progress? haha, im so impatient :D