For a 91 civic Si, I have either 14"steelies with 90% futuras 195/60/14s that I can probably go to 16 psi. Or 15 x 7 Drag GT3s with 90% yokohama s drive 195/50/15 that I can probably to to 22 psi? Or combination of both?

 

use your yakohama tires let them as far down as 17 psi... your best bet would be some drag radials or slicks... drag radials are very enexpensive...

 

and if your gonna use street tires your prob gonna have to walk it off the line... there just not ment for track or real hard launching!!!

 

Ok better BFG street slick size?

215/60/14 (more sidewall wrinkle)

or 205/50/14 (2lbs lighter each and more vehicle weight transfer over front tires.)

 

what kind of motor, trans, hp? if its just a stock si with a d16a6 i would def. go with the 205 50 14.