Tyre Pressures
Discussion
S1/2 22psi all round
S3 Can't find manual! (surely longer doors and different dash don't alter tyre pressures?
)
V8S 24psi all round
All space saver tyres 60psi
S1/2(3?) manuals state for high speed (normal!) running tyres should be increased by 2-4psi, the V8S manual does not mention this)
Cheers
LeeBee
S3 Can't find manual! (surely longer doors and different dash don't alter tyre pressures?
) V8S 24psi all round
All space saver tyres 60psi
S1/2(3?) manuals state for high speed (normal!) running tyres should be increased by 2-4psi, the V8S manual does not mention this)
Cheers
LeeBee
Roy,
I was not running anywhere near 32psi at Curborough. I think I was running road pressure. The 30+ comes from Peter H
When I attend the school at Curborough (yes and I still stuffed it
)a regular competitor I got taking to lowers the pressure for that circuit, although he was driving a Clio.
Edited by tvrmark on Friday 26th October 21:46
I was not running anywhere near 32psi at Curborough. I think I was running road pressure. The 30+ comes from Peter H
When I attend the school at Curborough (yes and I still stuffed it
)a regular competitor I got taking to lowers the pressure for that circuit, although he was driving a Clio. Edited by tvrmark on Friday 26th October 21:46
On the tyre pressures used at Curborough theme, I was talking to an experienced sprinter earlier this year at a Curborough sprint. He was running a standard Peugeot 205 GTi and ran pressures of 10 psi!! as good as flat..apparently gives fantastic grip, and the corners at curborough aren't fast enough to pull the tyres off their rims. Maybe I'll try it next year seeing as clearly TVRMark and I both have trouble keeping our cars on the island using normal pressures!
Dave S3
quote:
On the tyre pressures used at Curborough theme, I was talking to an experienced sprinter earlier this year at a Curborough sprint. He was running a standard Peugeot 205 GTi and ran pressures of 10 psi!! as good as flat..apparently gives fantastic grip, and the corners at curborough aren't fast enough to pull the tyres off their rims. Maybe I'll try it next year seeing as clearly TVRMark and I both have trouble keeping our cars on the island using normal pressures!
Dave S3
In general softer makes the car more progressive on the limit and more comfortable to drive. Harder makes the car slightly more responsive. There is no one 'ideal' pressure, it is a balance between 'feel' and grip. If you're just after ultimate grip, the optimum pressure varies depending on road conditions, what size and type of tyre it is and how much tread it has.
The less grip there is, the lower pressure you want. The more rain there is, the lower pressure you want. The more tread you have, the lower pressure you want. The wider tyre section you have, the lower pressure you want. S02PPs seem to like a lower pressure than the A520s I used before that.
If the tyres are very hot they work best at lower pressure, but this does generate more heat which can overheat the tyre if you are on the track.
I run at 24 all round on the road, up to 26/26 on really hot track days or down to 20/22 in the wet. But I have 245 section tyres on the rear and non-standard suspension, with the standard 205 I would always have the rear about 2 psi up on the fronts.
I guess unless you're after the absolute ultimate grip it isn't critical, just make sure the rears are 1 or 2 psi harder than the fronts and they are absolutely identical side to side.
Cheers,
Peter Humphries (and a green V8S)
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