Kamotors E30-Turbo to ITB M20

[ForcedFirebird]

Its a 533i flywheel with 533i clutch, 535i slave and 325i master, bad combo possibly?

Not sure, but if I remember correctly, Otis said he had to extend the slave in one of his cars, but can't recall if it was the m50 or m30 car. If the e30 master is significantly smaller, the slave may not travel far enough. It's an easy test to extend the slave rod, and if it doesn't work, just cut it back down.

[RagtopE30]

I am running a 533i spec clutch and a 325i slave an master with no problem

[kamotors]

Extending the slave seems like a good option, if I could honestly just engage another 1/4" it seems like it would work perfect.

[tinkerputzer]

Dumb question but do you have a clutch pedal stop installed?

[Good & Tight]

Not sure, but if I remember correctly, Otis said he had to extend the slave in one of his cars, but can't recall if it was the m50 or m30 car. If the e30 master is significantly smaller, the slave may not travel far enough. It's an easy test to extend the slave rod, and if it doesn't work, just cut it back down.

That was for the 7.25" Tilton twin disc.

If the slave hydraulic line is old it will expand causing the same problem also.

[kamotors]

I removed the clutch stop to gain some more travel and it still acted exactly the same. clutch lines are all NEW (soft lines and hard lines).
If the synchros are lined up while vehicle is running but not moving the clutch functions perfect.

When this first happened I couldn't even replicate the problem but now it seems to be every time I stop.

[jalopi]

Maybe it's a defective slave or master? Were your replacements aftermarket?

[ForcedFirebird]

Put the stop back in, or at least check travel on master. My buddies e30 lost a master two 14hr races in a row due to over extension. All my OEM manual cars had a plastic stop in them.

Thanks Otis, you had mentioned it when we were trying to figure out Livington's no disengage issue, and that one was a backwards disc fail lol. Seems so long ago.

[LJ851]

Clutch is engaging just at about 2-3" off the floor

If you can push the pedal 2-3 inches past the engagement point, that sure sounds like plenty of travel. I think i would be looking for another reason the disc would stay touching the flywheel like a warped disc or too tight spline fit.

I removed the clutch stop to gain some more travel and it still acted exactly the same. clutch lines are all NEW (soft lines and hard lines).
If the synchros are lined up while vehicle is running but not moving the clutch functions perfect.

When this first happened I couldn't even replicate the problem but now it seems to be every time I stop.

Can you explain this differently? If the engine is running with the trans in neutral and the clutch engaged, no syncros are lined up, they are spinning.

[kamotors]

video shows it working at first (basically perfect, smooth, easy to use). Then I roll a couple feet put it in neutral and stop and then it no longer works.

I dont think a back words clutch disc would work this good when it is working. plus the more I look at the E30 clutch it seems impossible to install backwards because the protruding side of the disc would hit the pilot bearing flywheel bolt area.

here is a video


another of just driving and how it works normal when moving.

[jalopi]

If the clutch was backwards I don't think it would disengage at all; my guess is still hydraulics.

[LJ851]

Throwout arm could be flexing under the stage 5 load.

[jalopi]

Throwout arm could be flexing under the stage 5 load.

+1, didn't even think of that, how much torque is that PP good for? make sure nothing's bending

[CorvallisBMW]

I am running a 533i spec clutch and a 325i slave an master with no problem

I run an e28 M5 clutch, FW and PP, 535i slave, 325i master. All is well.

OP, did you lightly grease the splines on the trans input shaft before installing the clutch disk? Maybe there's some binding going on?

[AwakenNoMore]

pilot bearing maybe? this tends to happen in rx-7's when there either isn't one or it's shot.