[Supras] New clutch slipping, shifting problem?

Wed Feb 27 16:45:08 CST 2008

I don't have any doubt that you know more than me about racing.  I've already made it clear I've never been to a track and have no interest in going.

My point was (albiet completely missed) that Brian wasn't asking how to race.  He was asking what's wrong with his clutch.

-Craig

---- Jeff Mohler <speedtoys.racing at gmail.com> wrote: 
> if I dont know better than you..school me on what Im missing in how to
> win a time trial race.
> 
> 
> Im -all- ears.
> 
> 
> 
> 
> 
> 
> On Wed, Feb 27, 2008 at 2:20 PM,  <cthommes at adelphia.net> wrote:
> > Besides Jeff's expected "I know more about racing than you" reply, perhaps you're actually looking for an answer to your question?
> >
> >  I hate to say it but it sounds like something in the clutch broke.  The lower disengagement point coupled with the slipping leads me to believe that there's something wedged or cocked somehow between the PP and flywheel.  I had similar symptoms when a puck pad broke free from one of it's rivets in an RPS clutch.
> >
> >  I also had similar symptoms when a hub spring broke out of a clutch disk in an old Integra I had.
> >
> >  Might be able to get the car in the air and see something through the inspection plates without too much hassle?
> >
> >  OOOOoooohhhhhh.... or perhaps you have the disk backwards on the input shaft?  This would also make all these things happen.  That'd suck...
> >
> >  -Craig
> >
> >
> >
> >  ---- Jeff Mohler <speedtoys.racing at gmail.com> wrote:
> >  > Dude, nobody EVER won a race from a stop.
> >  >
> >  > We dont do many standing-stop starts, because it breaks so much stuff.
> >  >   Clutches, diffys, transmissions...everyone's on race rubber that
> >  > wont give so easy also.
> >  >
> >  > if youre faster than someone..you'll catch em in a lap no matter what.
> >  >
> >  > On Wed, Feb 27, 2008 at 1:36 PM, Walker, Brian (Rich. Dist)
> >  > <Brian.Walker2 at vdot.virginia.gov> wrote:
> >  > >
> >  > >
> >  > > Didn't put much, I think it was due to a poor shift at the beginning of the
> >  > > lap. I wasn't sure if that would allow it to slip but evidently it can. I'll
> >  > > be trying it out under full sessions next month (these were time trial laps
> >  > > from a stop) and will try to smooth out the shifts by then.
> >  > >
> >  > > Btw, does the press. plate normally change the engagement point drastically?
> >  > > The pedal has to be depressed almost to the floor now and we've bled it a
> >  > > couple of times.
> >  > > Thanks,
> >  > > Brian
> >  > >
> >  > >  ________________________________
> >  > >  From: Dave Koos [mailto:dave at azsupras.com]
> >  > > Sent: Wednesday, February 27, 2008 3:51 PM
> >  > > To: Jeff Mohler; Walker, Brian (Rich. Dist)
> >  > > Cc: Supras at supras.com
> >  > >
> >  > >
> >  > > Subject: Re: [Supras] New clutch slipping, shifting problem?
> >  > >
> >  > >
> >  > >
> >  > >
> >  > > You didn't put too much grease on the input shaft of the trans, did you?!?!
> >  > >
> >  > > BTDT!! :-O
> >  > >
> >  > > Dave  92T & 86 P-type
> >  > > Mesa, AZ
> >  > > http://www.azsupras.com/suprattop.htm
> >  > > http://www.azsupras.com
> >  > >
> >  > >
> >  > > ----- Original Message -----
> >  > > From: Jeff Mohler
> >  > > To: Walker, Brian (Rich. Dist)
> >  > > Cc: Supras at supras.com
> >  > > Sent: Wednesday, February 27, 2008 9:30 AM
> >  > > Subject: Re: [Supras] New clutch slipping, shifting problem?
> >  > >
> >  > > Could have glazed in the bad earlier shift...doesnt have much time on it
> >  > > either.
> >  > >
> >  > > It SHOULD work itself out...over time.
> >  > >
> >  > > If it doesnt..its nothing that 200grit sandpaper can work out, but we
> >  > > all know what that would take to do.
> >  > >
> >  > > On Wed, Feb 27, 2008 at 8:22 AM, Walker, Brian (Rich. Dist)
> >  > > <Brian.Walker2 at vdot.virginia.gov> wrote:
> >  > > > I put about 700 miles on my new clutch (kevlar) and FW (AL.) before a
> >  > > >  time trial this weekend. During one lap it started slipping very
> >  > > >  noticably in 3rd so I let off, applied throttle again it was again
> >  > > >  slipping, much more than the stock unit ever had. Earlier in this lap I
> >  > > >  had made a poor shift to 2nd where I mistakenly slipped it a fair
> >  > > >  amount, could this be the reason it was slipping in 3rd and 4th? I know
> >  > > >  I'm not making the 460 ft-lb. the clutch is rated for (I'd guess I'm in
> >  > > >  the 320-340 hp range with similar torque)
> >  > > >  I was under the impression that the clutch will not slip once engaged
> >  > > >  unless it's TQ rating is exceeded, will poor engagement between shifts
> >  > > >  (ie: excessive heat) cause it to slip prior to this?
> >  > > >
> >  > > >  Thanks,
> >  > > >  Brian W
> >  > > >
> >  > > >
> >  > > >
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> >  > >
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