[Supras] New clutch slipping, shifting problem?
Jeff Mohler
speedtoys.racing at gmail.com
Wed Feb 27 16:55:41 CST 2008
Thats..different. Not how the other regions run their TT program.
TT doesnt require a _racing_ license, just Group-4 ability, and then
just a logbook and a box to put your steering wheel in when the rest
of the car is gone.
On Wed, Feb 27, 2008 at 2:42 PM, Walker, Brian (Rich. Dist)
<Brian.Walker2 at vdot.virginia.gov> wrote:
> This one was, billed as 'Circuit-cross' like a hill climb format. The
> standard NASA time trials (hot laps, full sessions) are license required
> and I don't have that experience yet.
>
>
> -----Original Message-----
> From: Jeff Mohler [mailto:speedtoys.racing at gmail.com]
> Sent: Wednesday, February 27, 2008 5:39 PM
> To: Walker, Brian (Rich. Dist)
>
>
> Cc: cthommes at adelphia.net; Supras at supras.com
> Subject: Re: [Supras] New clutch slipping, shifting problem?
>
> Brian: You guys run -1- lap time trials?
>
> On Wed, Feb 27, 2008 at 2:28 PM, Walker, Brian (Rich. Dist)
> <Brian.Walker2 at vdot.virginia.gov> wrote:
> > I don't think there's a problem with the setup, the disk is certainly
> > in place correctly (I wouldn't fully engage otherwise would it?)
> >
> > A ran a lap after the one where slipping occurred and made sure to
> > shift smoothly. Went even further into the revs and it was solid (as
> > solid as a 20 y/o engine can be) so I'm guessing this occurred from
> > the slipping between 1st/2nd.
> > As for Geoff's comment, he knows a whole lot more about racing than
> > me but this was time trials so a good start does come into play
> > (fastest
> > lap) but I try never to launch the car anyway since breaking pieces
> > isn't worth a couple 10ths. I think it was a combo of getting used to
>
> > the new FW and engagement point and shifting while the tires were
> > spinning and not gripping.
> >
> > How about the engagement point, I don't believe this is adjustable.
> > Seems like it wouldn't change unless the heavier plate takes more
> > movement (hyd. press) from the pedal to operate? Like I said, it has
> > to be almost to the floor now so it's thrown me off a little.
> >
> > Thanks,
> > Brian
> >
> >
> >
> > -----Original Message-----
> > From: cthommes at adelphia.net [mailto:cthommes at adelphia.net]
> > Sent: Wednesday, February 27, 2008 5:21 PM
> > To: Jeff Mohler
> > Cc: Supras at supras.com; Walker, Brian (Rich. Dist)
> > Subject: Re: [Supras] New clutch slipping, shifting problem?
> >
> > 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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> > > > > Supras at supras.com
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> > > > >
> > > >
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> > > >
> > >
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> >
>
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