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Re: Tyre pressure debate
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I took some pics of what I am babbling on about this morning, but they are out of focus, so I'll try again tomorrow! |
Re: Tyre pressure debate
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You need this. |
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Hmm - you link has four letters replaced with ****! Not sure what is censored..... |
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Re: Tyre pressure debate
Large River Patterns
This is what you get when your pressure is too low. Bigger footprint, less heat and larger tear patterns. Rear psi was ~6 lower than the manufacturers recommendation (36 psi): http://img141.imageshack.us/img141/8...atternsmn7.jpg Small River Patterns This is the sweet spot! You get the same patterns but they are much smaller indicating that the tyre is operating at it's optimum temperature. Rear psi was ~1-2 lower than manufacturers recommendation (36 psi): http://img232.imageshack.us/img232/9...atternseu0.jpg NOTE: This is just the info relayed from the Bridgestone technician. I'm running Michelin Pilot Power 2CTs, but he said that the principle is the same for most road tyres on the track. Also said that the front doesn't generate as much heat, so leave that pressure as is. |
Re: Tyre pressure debate
That first picture is pretty much how my tyre looked after the trackday on Monday evening - so the pressures were too low? I checked them last night and the rear was at 39psi - normal road pressure is 42psi.
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Re: Tyre pressure debate
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Like I said I have always dropped mine, but now have found out something to the contrary, with some theory and images to support it. I think I'm going to experiment a little on my next trackday, but as a base I'll drop 2psi on my rear and keep the front as is. |
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