[Shotimes] tire grip

[Ron Porter]

For autocross, go WAY smaller in the front bar. Lotsa 19mm around that folks
would probably give you free!!. IIRC, some of the auto-x guys used to
disconnect their front bar.

You want the car to "pivot" at low speeds. Only issue with getting a good
"pivot" in auto-x is that it could be too severe for the street or track
speeds.

In looking up the VictoRacers, I hope that you have them shaved/heat-cycled?
Of course, if you've already done track work with them, the heat cycling has
been done. If not, that can also cause issues.

Didn't you mean 225/50/16? I didn't see any 225/60/16 on the TR site. Those
225s are near-perfect for the 7.5" rim. I would not go to a wider tire like
a 245 unless you were getting rims at least 8" wide, preferably 8.5-9.0. For
auto-x, the 225 on a 7.5" rim should be all you need. Once you get the
driving technique perfected, they should be fine.

Actually, if you go to a 17" rim with 40-series tires, you may very well
LOSE contact patch, even with a 245 versus a 225 tire. I personally feel
that you have ore than enough tire right now. You might also play with tire
pressures some more, and experiment.

If I were doing auto-x in a SHO I personally wouldn't want Eibach springs.
The first few inches of soft compression do soften the response, and auto-x
requires quicker response than the street or track.

Ron Porter

-----Original Message-----
From: shotimes-admin@autox.team.net [mailto:shotimes-admin@autox.team.net]
On Behalf Of don donelson
Sent: Monday, December 05, 2005 10:52 AM
To: shotimes@autox.team.net
Subject: [Shotimes] tire grip

My Sr 72 has'nt been used since I ran the car at Sebring over a 1 1/2
ago ! ... Too many saturdays and sundays at the dealership and building
a new house for the past 14 mths.

Anyway .. i finally took the car to a SCCA event .. SOLO II. And did
fairly well. The car definitly out performed the driver ... me !

I didnt push the car to the limits ... I have no doubt that as I attend
more events I will get more in the groove and more comfortable doing so.

Question that I have is how do i get better grip ? The car still pushes
a little.

I use tokico shocks and Eibach springs .. 26 in sway bar the rear and 24
in the front. car is quiafed . Um ... all the suspension mods one can
think of have been done to it. I use Kuhmo Victor Racer 225x60x16 on
7.5" rims

If .. if i go to a 17 " rim .. ( something i have been thinking of to
get 13" rotors up front) and use a 245x40 tire ... wont that give me a
significantly better contact patch. Also .... i know some autocross
tires grip signifcantly better than other tires.

I have also heard with a qauife to use a smaller front sway bar .. say
abouta 22. Is this correct ?

Thanks for the input

dond



Sr 72 race preped 89 SHO

-3.2 ATX block
-FPS hi-flow heads w/  over sized valves
-.40 cams
-SHONUT adjustable timing sprockets
-Ported intake & runners
-Ported and extrude honed exhaust manifolds
-Hi-flow catless Y pipe
-Hi-flow exhaust
-BBB
-SHO SHOP T.B.
-SHONUT phenolic spacers
-Quaife
-CAI
-UDP
****
-16x7.5 rims with Kuhmo Victor racer auto cross tires
-Complete sunpro gauges
oil temp / water temp / oil pressure
****
-Tokico shocks/Eibach springs
-Polyurethane at all corners
-Solid-sub frame bushings
-Frame stiffners
-Adjustable rear control arms
-Battery located in trunk for better weight distrubution
****
-96 brake up grade
-Steel braided lines
-race seat
-est 2650 pds  :)

can u say "fast" ??

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