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Old 10-06-2018, 07:23 PM
turboguy turboguy is offline
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Hankook RS4 optimal temps/feedback

Is there an optimal hot pressures/temp that Hankook RS4 tires like to see?


Here is the pressure and (outside/middle/inside) tire temp data from my last session on the (predominantly right turn) Grand Bend Technical track layout. All data from Joe's Racing gauges:

Run 5/
1:15.82 fastest lap / 1:14.30 RaceChrono optimal

LF 154/156/160 39.6 psi
RF 130/140/151 39.2 psi
RR 124/139/142 34.7 psi
LR 132/139/140 34.7 psi

Temps measured in the order above, then pressures done in same order. Only a ~1/4 mile cool down before parking in the pits & measuring.



Questions:

1) Will running lower front "hot pressures" increase front end grip?


2) If so, will this also translate to more initial bite on turn in?


3) How does my temperature spread across the face of the tire look?

Last edited by turboguy; 10-06-2018 at 07:29 PM.
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Old 10-07-2018, 01:10 PM
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Dave Barker Dave Barker is offline
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Re: Hankook RS4 optimal temps/feedback

Need to know a few things. Type of car (drive configuration), weight, camber measurements and how hot did you do your cool down lap?

Off hand, I would think your front pressures are a bit high.
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Old 10-08-2018, 07:48 AM
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Slowpoke Slowpoke is offline
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Re: Hankook RS4 optimal temps/feedback

Do you have a FWD car? What is your Tire size and rim ? Spring rates and bar sizes?

Yes, your front pressures look high. I don't find myself using more than 36psi the last few years on street radials.
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