Wed night Fun Races (2021)

[deecee52]

My default first setup tweak of any new car for as long as I can remember has always been to minimise the tyre pressures first of all.

Regardless of that, I’ve not come across another car that is so eager to heat the outer edges - and I’m intrigued by the caster-reduction outcome given that even at its minimum setting, there is still ‘significant’ positive caster present.

Anyway, the car seems quite fun - and after a quick two-car sprint with KCW yesterday afternoon it seems serendipitous that we are only running six lap races as the tyres scream for help….:eek:

As you turn in the outer edge of the tyre tucks under as the sidewall is too soft to stop this happening , thats the cause of the excessive outside temp , by adding camber you eventually get to the point where tyre deformation is so much the middle and inside areas loose contact so the grip starts to fall away . Ignore tyre temps go by how the car feels , from max front camber back off a couple degrees try it then do the same again , you will feel the grip come to you around 3.5 - 3.7 is where i get best feeling .
The Brabham BT20 was terrible for this as it ran very high profile tyres .
The only mod i have come across where the tyres behave almost as you would expect is the 70s mod by Postipate and Wiggum , thier tyres actually have a working range which you can use to tune the handling , its only a small range 100 > 115 and i dont know what they did but it works .