BillH wrote:
Quote:

383tpimachine wrote:
I was figuring on 295s all around to keep it square. I know 315s will fit out back but I am leery of using a 315 up front with the early offsets and clearances.

I heard running different widths could cause strange driving quarks but I have no real experience with this beyond street driving 275/305 setup.

I was going with the taller rear tires to get the desired mph in 4th I would like to max out on. 3.55 rear gear at 1:1 295/40/18 hits 148 at my max rpm.

Travis, unless you've had 3-4 years experience on big tracks running 6+ events per year- none of this matters at all.

Changing the width or size won't gain/loose you anything noticable. However, puting taller tires on the rear can easily lead to your tires rubbing the fenders and you going home early. I know this first hand, have sent 2- C4 drivers home after one session because of this safety concern (and they lost their $250 entry fee).

Max. MPH on the straightaway won't be a function of tires and gears, it's a function of how fast you come out of the corner approaching the straight.
And unless you're going to a track with an extremely long straight, you're not going to see 148.

Drive the car with what you have on it and have fun.