UK Karting - Notice Board (General Karting) : Re: Oversteer after time

Notice Board (General Karting)

Re: Oversteer after time
Posted by 'SimonS' on 20 Apr 2012 @ 14:24

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SimonSJoined: December 2004
Total Posts: 4
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Tyre temps are related to the tyre pressure.

Most manufacturers don't seem to publish ideal tyre temps and pressures but they seem to be around 1 to 1.2 bar and 140F to 160F (60 to 70 C). That's nearly as hot as a radiator *80C) in a house. F1 tyres go as high as 100C, boiling water.

The increase in temperature is proportional to increase in pressure. However temperature is in Kelvin; (celsius +273).

So if you go out with your tyres at 10C (283K) and 1 bar and come in with them at 1.2 bar, ie a rise of 20% then the temperature will have risen by 20% too, 56.6K to 66 degreesC (10+56). That may be too warm if the tyres are best at 60c. A rise of 50C from 10C is 17% (50K is 17% of 283K)

Since 1.7 bar is 2.5 psi, you can understand that rough and ready rule that one looks for the 2 psi rise in pressure to see if the tyres are getting hot enough. (Since your 'cold' tyres are more likely to be around 15 to 20c in the UK)

Essentially, if you have seen a 2psi 0.15 bar rise in the tyre pressure from 1 bar, you have probably been close to the optimum tyre temperature.

Message Thread:

Oversteer after time by 'Danlee' (19 Apr 2012 @ 13:00)

Re: Oversteer after time by 'MattScott' (19 Apr 2012 @ 13:05)

Re: Oversteer after time by 'Danlee' (19 Apr 2012 @ 14:20)

Re: Oversteer after time by 'michaelg36' (19 Apr 2012 @ 18:54)

Re: Oversteer after time by 'itpro' (19 Apr 2012 @ 19:47)

Re: Oversteer after time by 'Nozza' (19 Apr 2012 @ 20:47)

Re: Oversteer after time by 'nilocshooting' (19 Apr 2012 @ 20:52)

Re: Oversteer after time by 'SimonS' << You are here!

Re: Oversteer after time by 'HR3' (19 Apr 2012 @ 21:24)

Re: Oversteer after time by 'Danlee' (19 Apr 2012 @ 23:15)

Re: Oversteer after time by 'Traxtar' (20 Apr 2012 @ 0:05)

Re: Oversteer after time by 'Cadet33' (20 Apr 2012 @ 16:13)

Re: Oversteer after time by 'Danlee' (20 Apr 2012 @ 18:14)

Re: Oversteer after time by 'KenE' (22 Apr 2012 @ 23:35)

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