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Old Jan 29, 2006 | 11:21 AM
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markk
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From: Lancs
Default Re: tyre pressure for hillclimb

Originally Posted by kennyA
Hi, what about Avon slicks.
I have currently 8x17 ET15 MO,s 9/23.3 x 17 avon diagonal. This year 2006, slightly bigger 230/620 x 17 radial.
Air temp 30 deg, track temp 35 - 40 deg.
Race distance between 2km and 4km.
Tyres checked when warm, not hot. (2-3 mins after run). In fact due to short distance the tyre temp does not get hot, probably not to full working temps during some runs.
Front 28.5psi
Rear 27.5psi.

Could this be contributing to my slight understeer?


always looking for advice from others with more experience.

cheers.
if your not getting enough heat into your tyres then ultimatley your not getting the grip back from them, i dont know too much about avons as ive never run them but they are probably not suitable for your application if they are not getting hot enough , if your actually racing with them take a temp monitor, after your race distance have a measure across the tyres in three equal spacings, in the middle then one each side, record the temps then do a bit of analysis as to what the temps are, to make sure your 'footprint' is firmly on the ground you should see equal temps across each tyre, thats not all tyres equal, but all three readings

god im waffling like BAL

but seriously if thats your pressures after a race then you should have built up enough heat by then, if the footprint is ok, the temps are ok then maybe your compound needs to be softer ?
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