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Old 04-08-2007, 04:32 PM   #1
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Default Interpreting tyre temps

Decided to check my rear tyre temps today.

TOYO T1R,S 215x16x40 as new condition, running at 26psi when temps taken
Weather warm and dry
1/2hr blat of twisties and straights

Stopped to take measurements.took temps at 5 points across the tyre from outer to inner then back to outer

LEFT REAR
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RIGHT REAR
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Overall ok- but there is quite a bit of difference in the outer of the left rear - compared to the rest of the tyre and in comparison to the same point in the right rear tyre.

I have been feeling what is very similar to "lift off oversteer" but on high speed bends/curves- even on a trailing throttle.I,m wondering if its connected to the tyre temps and probably down to the camber/alignment settings on rears.

Anyone any comments/experience of this.?
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Old 04-08-2007, 05:15 PM   #2
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I've never done temps on street tires- but with race tires you're looking for the least amount of deviation across the tire- think balance. You have to take into consideration things like the track, more right handers than left handers? etc.

In general higher temps on the inner part are evidence of too much neg camber, while the opposite would show higher temps on the outside. Low tire pressures would also show high temps on the outside. Cool temps on the outer, higher temps in the middle is overinflation... and so on.

What's missing from your images is which temp is the inside of the tire and which temp is outside.
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Old 04-08-2007, 05:25 PM   #3
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this is a pretty good article on it:

http://www.race-cars-classics.com/information/tyres.php
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Old 04-09-2007, 06:32 PM   #4
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Quote:
Originally Posted by Braineack View Post
this is a pretty good article on it:

http://www.race-cars-classics.com/information/tyres.php

Absolutely- that was a great read- thanks
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