Post by raceface13 on Aug 17, 2017 13:05:06 GMT
Copied of the cliosport forum as I thought this might help people getting the most out of their tyres
SCRUBBING IN.
The R888 tyre is fully cured and therefore does not require heat cycling but it is recommended that the tyres are scrubbed to remove any mould release chemicals.
Toyo recommend that the tread temperatures are raised gradually over a few laps to avoid graining.
TREAD TEMPERATURES.
The optimal tread temperature for the R888 is 71-105°C and the differential between the outside and inside shoulders should never differ by more than 15°C.
Interpreting Tread Temperatures Cause
Inside shoulder hottest by more than 15°C = Too much negative camber
Centre section hottest = Tyre pressures too high
Outside shoulder hottest by more than 15°C = Not enough negative camber
Both shoulders hotter then centre = Tyre pressure too low
TYRE PRESSURES.
Vehicle Weight
Cold PressureHot Pressure
Very Light - Under 800kg = 17-22 psi COLD, 22-29 psi HOT
Light 800-1000kg = 20-26 psi COLD, 24-32psi HOT
Heavy 1000-1400kg = 23-27 psi COLD, 28-40 psi HOT
Very Heavy over 1400kg = 27-35 psi COLD, 37-40 psi HOT
ADJUSTMENTS TO REDUCE UNDERSTEER / OVERSTEER.
AdjustmentTo Reduce Mid Corner UndersteerTo Reduce Mid Corner OversteerAir PressureFront TyreDecreaseIncreaseRear TyreIncreaseDecreaseTyresFront WidthIncreaseDecreaseRear WidthDecreaseIncreaseWheelsFront WidthWiderNarrowerRear WidthNarrowerWiderAlignmentFront CamberMore NegativeLess NegativeRear CamberLess NegativeMore NegativeAnti Roll BarsFrontSoftenStiffenRearStiffenSoften
SCRUBBING IN.
The R888 tyre is fully cured and therefore does not require heat cycling but it is recommended that the tyres are scrubbed to remove any mould release chemicals.
Toyo recommend that the tread temperatures are raised gradually over a few laps to avoid graining.
TREAD TEMPERATURES.
The optimal tread temperature for the R888 is 71-105°C and the differential between the outside and inside shoulders should never differ by more than 15°C.
Interpreting Tread Temperatures Cause
Inside shoulder hottest by more than 15°C = Too much negative camber
Centre section hottest = Tyre pressures too high
Outside shoulder hottest by more than 15°C = Not enough negative camber
Both shoulders hotter then centre = Tyre pressure too low
TYRE PRESSURES.
Vehicle Weight
Cold PressureHot Pressure
Very Light - Under 800kg = 17-22 psi COLD, 22-29 psi HOT
Light 800-1000kg = 20-26 psi COLD, 24-32psi HOT
Heavy 1000-1400kg = 23-27 psi COLD, 28-40 psi HOT
Very Heavy over 1400kg = 27-35 psi COLD, 37-40 psi HOT
ADJUSTMENTS TO REDUCE UNDERSTEER / OVERSTEER.
AdjustmentTo Reduce Mid Corner UndersteerTo Reduce Mid Corner OversteerAir PressureFront TyreDecreaseIncreaseRear TyreIncreaseDecreaseTyresFront WidthIncreaseDecreaseRear WidthDecreaseIncreaseWheelsFront WidthWiderNarrowerRear WidthNarrowerWiderAlignmentFront CamberMore NegativeLess NegativeRear CamberLess NegativeMore NegativeAnti Roll BarsFrontSoftenStiffenRearStiffenSoften