Went to Drag Strip---->Clutch screwed...HELP?

[jspaeth]

My SR has roughly 300 ft-lbs of torque....I drive it all over the place with 34 psi in the rear tires....I launch it sometimes on back roads, routinely floor it, downshift under full load....NEVER any clutch issues.

SO I went to the drag strip today, let my air down to 25 psi in my rear tires....did a burnout...

Then, when I launched, it just spun first AND 2nd gear....but the CLUTCH was spinning, not the tires....I let it coast down the strip, and then put it back in second and floored it, and it grabbed and went fine.


So my question is....is it possible that driving on the street, with SOME wheelspin in 1st and 2nd, it is fine, but then the traction at the DRAG strip was so good that it finally caused the clutch to completely slip???

This is an ACT Street with Heavy Duty PP, I think rated at like 350 ft-lbs or so.


Also, after this happened, driving home it grabbed fine, even with launches and flooring it, but the engagement point now seems LOWER (pedal further down).....hmmm

Is the clutch fried?
Something wrong with the master/slave?

I hate my life

[burninskulls0911]

ive had that happen to me before
my clutch always grips great and every once and a while if im sliding on something with more grip it will slip a little

if it starts to slip more and more then i would replace it
if not then drive it till it does go

how many miles on the clutch?

[jspaeth]

Um maybe 10,000 miles on the clutch?

I just bought a new master and slave and am going to replace them just to be safe.

Then maybe I will do the clutch itself another time.

I hope setting up the new slave/master and bleeding isn't going to be a huge project :-(


Oh Yeah, and it was more than just a little bit of slip, it was full disengagement, like car going NOWHERE and revs going straight up, zero connection.

[projectRDM]

It drives fine now though, just a lower engagement? Does it slip at all? You could have just glazed the disc so bad it overheated and slipped, scoring off a bunch of friction surface, now that it's cooled it's working again but you've lost a lot of friction material. I'd say get ready to replace it soon, if you took off enough to drop the pedal there's not much left.

[bkfill]

Originally Posted by projectRDM

It drives fine now though, just a lower engagement? Does it slip at all? You could have just glazed the disc so bad it overheated and slipped, scoring off a bunch of friction surface, now that it's cooled it's working again but you've lost a lot of friction material. I'd say get ready to replace it soon, if you took off enough to drop the pedal there's not much left.

+1 What he said
i'm about to buy a new clutch i think im going back to organic/kelvar, im scared its gunna slip
im going to try the ACT streetdisc xtreme pp

im using a exedy stage2(cermatallic) (never slipped even if when abused but it lasted me under 10k, another bad thing it put a groove in my flywheel)

[ericcastro]

I drift a SOHC with a auto zone clutch.

Every so often it will slip during a clutch kick initiation.
i just ease off, let it grab, and slowly get back on it.

Then it doesnt do it again for months.

Could just be it didnt grab cause the torque and its still all good, like mine.

And yes, 300hp, 25psi, drag strip traction, thats alot of work for a clutch