Trevor Booth
Lifetime Supporter
Russ,
What you really need to know is how hot the tyres are and the rec temp by the manufacturer. With the same compound not hot enough- fitting smaller width tyre will increase temp. Stiffer springs , roll bar settings will also help.
You can also get them too hot.
I would not compare your car to an F5000 , it is how the tyre is "worked" by the car and driver that is the essential difference.
What you need is a proper pyrometer with a needle probe so that you can measure your temp just under the surface. Not cheap but cheaper than horsepower for the benefit gained. Those no contact infra red gadgets are a waste of time.
A11 is a middle of the range compound, A15 is a soft compound for wet tracks (grooved of course) prob too soft for your car.
A46 is softer than A11. You need to be careful with avon compounds , they dont run numerically and they rate them hard -soft related to the mass and type of car.
So what is "soft" for your car would be "hard" for a lighter car. You should have a chat with your avon tyre bloke.
as far as the other GT40 on slicks - his slicks old, your tyres new- better car and driver- more knowledge of the track. Many reasons why one car quicker than the other.
Personally I never compare different cars, what the other car is using (unless it is apples for apples comparison) is not relevant- to me it is about getting the car I am working on or driving to go quicker.
The right slicks with the right set up will certainly make your car quicker than treaded tyres.
What you really need to know is how hot the tyres are and the rec temp by the manufacturer. With the same compound not hot enough- fitting smaller width tyre will increase temp. Stiffer springs , roll bar settings will also help.
You can also get them too hot.
I would not compare your car to an F5000 , it is how the tyre is "worked" by the car and driver that is the essential difference.
What you need is a proper pyrometer with a needle probe so that you can measure your temp just under the surface. Not cheap but cheaper than horsepower for the benefit gained. Those no contact infra red gadgets are a waste of time.
A11 is a middle of the range compound, A15 is a soft compound for wet tracks (grooved of course) prob too soft for your car.
A46 is softer than A11. You need to be careful with avon compounds , they dont run numerically and they rate them hard -soft related to the mass and type of car.
So what is "soft" for your car would be "hard" for a lighter car. You should have a chat with your avon tyre bloke.
as far as the other GT40 on slicks - his slicks old, your tyres new- better car and driver- more knowledge of the track. Many reasons why one car quicker than the other.
Personally I never compare different cars, what the other car is using (unless it is apples for apples comparison) is not relevant- to me it is about getting the car I am working on or driving to go quicker.
The right slicks with the right set up will certainly make your car quicker than treaded tyres.