[Shotimes] broken PP torque strap

[Justin Schick]

Thanks for the info Mark, it is greatly appreciated.

I did buy the SS aluminum flywheel, because of the overhang issue. Was told at the time it was no big deal, but I was still leery enough to pay the extra for the SS unit.


Justin Schick - '92 SHO cruising around KC MO
SHOTimes list info: http://www.shotimes.com/SHO1.html


>>> "Mark Nunnally" <manunnal@netheaven.com> 11/14/02 04:39PM >>>
> Who does what modifications to the pressure plates out there? From what I
remember of the >discussion Hrinsin was in a while back, Centerforce's was
the most modified from stock.

    You will get a wide range of opinions of clutch's.  CF uses bigger
straps and rivets on the PP (like most others) and messes with the fulcrum
point on the PP, get a little more clamp load out of the cover.  (Josh T.
cut open a cover and verified this).  The disc is a puck design on the FW
side, and full face on the PP side.  Dunno what material they use, it's
pretty friendly I think (ie not grabby) but I know that Josh T got his to
slip pretty badly with a stock motor and drag radials.  I also tried a CF
disc on a IRT (gary morrel) plate (bigger straps, high tensile bolts for the
fastners) and it slipped on me to.

I don't have any firsthand info with the southbend units, although I know of
1 blower car that tried one of their aggressive set-ups (kevlar on one side,
ceramic pucks on the other) and it slipped.

IPT sells a line of clutch's made by a co that seem to be pretty tough.  I
installed a "stage 4" unit on a 95 SHO and it seemed like a nice sturdy kit.
PP has bigger drive straps and rivets, tweaked like the CF unit for a little
more clamp load, and the disc is a solid hub design, 4 puck, pretty sturdy
looking.  I know of 1 blower car running this set-up w/ no slip.

You are running a fidanza flywheel?  I installed one on a 93 SHO for a guy
running N20.  The insert on the fidanze flywheel is smaller than the stock
friction disc.  So the disc overhangs the insert and touches the alum.  Not
good.  The SS unit fits the stock disc much better, and already has a nice
blanch grind on the insert.  I remember John H. saying his fidanza unit had
some high spots and had to get it ground.  The SS unit also weighs about 1
lb less.

Some of the blower guys (running the gorilla twin spring SS unit) were
having the kevlar FW side of the units tearing themselves up pretty quick.
Seems the thin inserts don't have a lot of heat capacity like a stock or
steel flywheel.  I think some of them have ditched the 8 lb alum units for
the stiffer steel billets.

I guess we are all learning as we go, but it's just a matter of exactly what
kind of set-up you are running that sorta dictates what you need.  The alum
flywheel is a nice piece though, when I put it on the 3.2L it was noticable.
When I went back to the old clutch and stock flywheel, I could REALLY tell a
difference.  You get used to the light inertia, with the stocker back on it
felt like it took a year to rev to 7k.

mark