I went to the 1/8th mile track on street tires i ran 8.5 @94 mph. so i need some slicks. I was thinking of buying some 23X8.5X15 to go on my car. because i have a set of 15x7 wheels laying around. my friends at the track keep telling me i need a 13 inch wheel and slick so i will have more sidewall. will it make that big of a differents to spend a another
350$ for wheels.

 

Depends on your hp level. The 15" will most likely work with your hp setup. The m&h 23x8.5x15 is a good choice.

 

i am making just over 300hp going back to the dyno this week shooting for 400hp. what is the max hp on the 23s

 

My choice on 15" was because of brake clearance, I have Nsx brakes, if find some 13" that clears it will be nice.

 

i was also thinking about this. what rim size would u recomend for 500hp. also do your transmission have alot to do with rim size?