a bit of clarification on M20 flywheel/clutch conversion

[Vandy688]

I’m not to sure on the condition of the pivot pit. I do know it is there tho as i pulled the gearbox out again as i forgot to put a little grease on the top of the pin. Is there anyway to align the clutch pedal with the brake pedal as the clutch pedal sits a little higher than the Break. I should know this, but I have had the car of the road for 6 months and totally forgot 😭

i guess taking the car for a drive and using the clutch and i would also see some improvement?

[irish44j]

So since I started this thread in the first place, I though I'd update it:

I ran the M20 FW, M20 starter, M20 clutch, M42 spacer, G240, and 323i TOB for 5+ years with no issues behind my M42

Now I run the identical setup behind an M50 with the G240 (which incidentally is a direct fit to the M50)

I am about to swap in a G250 and plan to use the same setup once again, but may just use a regular 325i TOB since they're half the price of the e21 stuff.

Also, I have the Condor brass pivot ball, FWIW.

All of this is on a competition stage rally car, so it definitely takes some punishment :)

[roguetoaster]

Nice update, when you do the 250 swap please do compare the TOBs again, just to see if anything important has changed with revisions over time.

[OSAH racing]

Irish44. I had the following done m42 m20 FW, lightens to 17lbs, m20 clutch kit, 240 trans. now sure on the spacer use but i can ask. Rubber engine mounts added by the mechanic poly trans and diff bushings, all suspension bushings poly, The vibration on idle up to 4 k is excessive. more than my m20 car with all poly. loud buzzing from the drive train undecereration with a load. I had the m42 swapped in m50 out. the m50 had almost no vibration and zero buzzing under deceleration. Its so excessive i can't hear the engine running while driving the LA freeways. Can you describe how much vibration with the m20 flywheel i should expect.

[Victell]

Irish44. I had the following done m42 m20 FW, lightens to 17lbs, m20 clutch kit, 240 trans. now sure on the spacer use but i can ask. Rubber engine mounts added by the mechanic poly trans and diff bushings, all suspension bushings poly, The vibration on idle up to 4 k is excessive. more than my m20 car with all poly. loud buzzing from the drive train undecereration with a load. I had the m42 swapped in m50 out. the m50 had almost no vibration and zero buzzing under deceleration. Its so excessive i can't hear the engine running while driving the LA freeways. Can you describe how much vibration with the m20 flywheel i should expect.

I tried rubber engine mounts in my m42 and QUICKLY went back to liquid-filled. The added vibration and noise was pretty extreme. Rubber mounts work fine on a inline 6, but not on a 4-cylinder without balance shafts.

[OSAH racing]

I tried rubber engine mounts in my m42 and QUICKLY went back to liquid-filled. The added vibration and noise was pretty extreme. Rubber mounts work fine on a inline 6, but not on a 4-cylinder without balance shafts.

I can tell this little 4 banger engine is buzzy. The Mechanic's advice is to use only the dual mass flywheels with the m42. I am trying to decide (guess at this point) if all rubber on the drive train would improve this more than all poly. I don't want to give up on the m20 flywheel and I am not changing my suspension bushings back to rubber. what bushings were you satisfied with at the trans and differential which the liquid filled engine mounts?