TRACK DAY TYRE PRESSURES
30 January 2004, 07:20 PM
#2
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depends on the temp and conditions.
usually run plus 4 to 6 psi in the dry, and I run a little bit under normal pressure in the wet.
adjust your pressures during the day until you feel a pressure you're happy with. adjusting the front to rear ratio can cause a major change in handling on track, so play with it.
keep a close eye on your pressures tho, as in the dry they can increase incredibly quickly!
if you need any more specific advice please email me or post on here, where I am sure another of the veterans will be happy to help.
cheers,
simon
usually run plus 4 to 6 psi in the dry, and I run a little bit under normal pressure in the wet.
adjust your pressures during the day until you feel a pressure you're happy with. adjusting the front to rear ratio can cause a major change in handling on track, so play with it.
keep a close eye on your pressures tho, as in the dry they can increase incredibly quickly!
if you need any more specific advice please email me or post on here, where I am sure another of the veterans will be happy to help.
cheers,
simon
07 February 2004, 12:19 AM
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Track Day tyre pressures
I have tested for several Rally teams over the years and tyre pressure is a tricky one -
The general rule is to keep the tyre pressure at a constant 30 PSI when it is at its hottest operating temparature -
For example, on a hot dry day, start of with 22 psi on the front and 23 psi at the rear. The pressures should equal out at 30 psi all round at the end of say 5 quick laps at castle combe (they will get upto this pressure after 2-3 laps).The increase in psi is due to the increase in heat in the tyre. The reason we aim for 30 psi is that this is where MOST tyres are performing at their best.
When we first started we made the mistake of running too high a pressure which resulted some awful tyre performance.
Give it a go, but as RRH said, its also down to personal preferance.
The general rule is to keep the tyre pressure at a constant 30 PSI when it is at its hottest operating temparature -
For example, on a hot dry day, start of with 22 psi on the front and 23 psi at the rear. The pressures should equal out at 30 psi all round at the end of say 5 quick laps at castle combe (they will get upto this pressure after 2-3 laps).The increase in psi is due to the increase in heat in the tyre. The reason we aim for 30 psi is that this is where MOST tyres are performing at their best.
When we first started we made the mistake of running too high a pressure which resulted some awful tyre performance.
Give it a go, but as RRH said, its also down to personal preferance.
07 February 2004, 11:19 AM
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the last post sounds like good advice for optimum grip. will try it at Oulton next week.
increasing the pressures slightly usually helps preserve your tyres a little, so it doesn't take the outside edges off so quickly.
simon
increasing the pressures slightly usually helps preserve your tyres a little, so it doesn't take the outside edges off so quickly.
simon
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