What is the best size of slick for 15X7 ten hole rim ?

[Bite_ME]

Currently I am running 17X9 cobra r rims with 245 45 17 kumho estca 712 tires and I can not hook for &^%$ at the track. I just got my rear end done with new Ford Racing track -lok for 31 spline axles with carbon fiber clutches with USA alloy axles and Ford Racing 3.73 gears and trick flow rear cover.

 

[Cobra912]

good question. I have a 26x8 on a ten hole and the RPM's are at aound 5600 with 3.73's through the traps!

 

[Bite_ME]

Is that in third or fourth gear cobra912 ?

 

[Cobra912]

that would be forth gear for my T-5.