Track day - tyre sizing

I was wondering, if for the track you decided to use 4 tyres of the same size, what would this do to the handling of the car ?

for example a 240 front tyres and 240 rear tyres ? would this make the car more likely to oversteer ?

My slicks are all the same size, like sh$t to a blanket

for example a 240 front tyres and 240 rear tyres ? would this make the car more likely to oversteer ?

Yes it would... but then the Supra is a bit of an understeery beast with stock sizes.

My slicks are all the same size, like sh$t to a blanket

Cool, im glad you said that, i have aquired a set of yoko advan slicks

Yes it would... but then the Supra is a bit of an understeery beast with stock sizes.

Sorry but I disagree. I had 225's all round on my old NA (stock sizes) and it was fine. I wouldn't want 240's on the back of a TT though, especially not a modified one.

Sorry but I disagree. I had 225's all round on my old NA (stock sizes) and it was fine. I wouldn't want 240's on the back of a TT though, especially not a modified one.

They are slicks and would 15 mm really make that much difference ?

Sorry but I disagree. I had 225's all round on my old NA (stock sizes) and it was fine. I wouldn't want 240's on the back of a TT though, especially not a modified one.

You disagree with what exactly? That the Supra is an understeery beast? I'm quite sure your NA was fine with 225's all round.

My slicks are all the same size, like sh$t to a blanket

if you don't mind me asking...what size are yours si?

and what rims do you put them on?

looking at getting a set for my spare rims, but will have to wait until later in the year.

I stuck with stock sizes with my Toyos, and the front did understeer but thats how it handles anyway, which makes for safer track driving. Back end was near impossible to lose unless you were deliberately trying.

I stuck with stock sizes with my Toyos, and the front did understeer but thats how it handles anyway, which makes for safer track driving. Back end was near impossible to lose unless you were deliberately trying.

I found a bit more aggressive negative camber upfront eliminates the understeer nicely, I like the understeer on the road (safety) but for marham, I'm considering giving it a little tweak

If you have a little understeer on track what's the trick to keeping your lap times up? a little slower in but on the throttle earlier?

My slicks are 240 all round, not a hint of understeer and you really have to nail it to get the rear loose, that was bpu might be a different story now,

Mike, yeah thats true.. I just havent got round to fiddling with any settings in a serious way tbh.

Si, you did get the back end out a couple of times when you were following me at Bedford in your vid, so maybe wider tyres would help a little? Having said that, 99% of the rest of the time you had no issues at all.

Mike, yeah thats true.. I just havent got round to fiddling with any settings in a serious way tbh.

 

Si, you did get the back end out a couple of times when you were following me at Bedford in your vid, so maybe wider tyres would help a little? Having said that, 99% of the rest of the time you had no issues at all.

Yeh thats true, it was mainly out of the hairpin after the pit straight which is a 2nd gear corner so loads of torque going on.