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Thread: TRACK & HILLS TYRE PRESSURES for grip

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    Senior Member AIROCOBRA's Avatar
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    Default TRACK & HILLS TYRE PRESSURES for grip

    While I am researching tyres , here is a new question ?

    What do you guys run your tyres at on the track ????

    - brand of tyre & size ?
    - slick or semi slick ?
    - trye pressures for grip

    Regards Bob
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    toyo r1r 195/50
    street/light track
    28psi cold for hills work

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    I always used to run 32psi as a rule. But a professional driver ( has done over 3 million K's, trains special forces, races at lakeside etc, knows his shit) told me to run upwards of 40, as 32 allows the tyre to arch on the road, so that only either side is getting traction, not the middle. I tried 42psi, felt a shit load better. Was pretty shocked actually. Same guy told me that tyre companies tell you to run 28-32 because they'd sell more tyres than if you ran correct pressure.
    Just as an experiment try 40, see if it's better.
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    This. With 185 60 14 RE001

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    really 28psi?
    that seems rather low.

    i usually go 35ish.
    with kumho ku31? (one before the semi slick)
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    ^^ Pressure will raise with heat. Although it is low. Your pressure is pretty good though.
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    Hi pigeonspec ,
    Higher did not work for me !!!! last hillclimb . I normally run 28 psi like AGPS , seems to grip well . But last climb forgot tyre gauge and borrowed one . I'm a wee bit on the blind side without reading spec's and the borrowed gauge had KPA / PSI reverse to my usual gauge . Bugger !!!! therefore was running about 46+ PSI .I am not normally into drift but I was on that day , bloody thing was sideways everywhere , ran out of lock couple of times , had one big spin . Had new engine with more GRUNT , but my times where shit .Spectators seem to be like it though .
    When I got home was looking at the tyre guage ( spec's on ) . SHIT !!!!!!!! I run FEDERALS RSR 595 195/50/15 . There OK ? , Looking for more grip with next set .
    Regards BOB
    ONLY THE GOOD DIE YOUNG ------ I MUST BE VERY VERY VERY BAD

    AE86 4AGE 16V N/A TRACK CAR ( RED )
    AE86 ROLLING SHELL --- IN CASE i F-CK UP !!!!!! (PRIMER )
    AE86 ADM UNDER CONSTRUCTION ( STREET CAR) 4AGE 16V , (RED )
    AE86 Trueno ( RESTORE TO PERIOD GOODNESS ) White
    AE86 4AGZE Wreck ( to be rebuilt into Khannacross fun car )
    KE 15 x 2 -- SPRINTER ( RESTORE TO PERIOD GOODNESS ) RED
    TE72 (T18) X 2 BIT OF PAINT , BIT OF MECHANICAL way we go RED
    Soarer 1995 1JZ Factory 5speed (R154 )

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    ^^ Each to their own I guess. 46 cold? I agree that would be too high.
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    I honeslty reckon it depends on the tyre

    R1R have steel in the sidewalls, so theyre not sloppy and i get them pretty hot, so would raise from 28 obviously....

    My car is light so i see no reason to run more

    And yeah, 40psi is slippery.

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    Front 30psi
    Rear 40psi

    usually works well for me as it cuts good skids when needed but not too bad when you have no low down torques
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