With a 275/40/17 nitto I ran 14psi with high 1.7 60FT Nittos dont like alot of hp if your close to stock they should work OK just get them real hot before you run they like heat.
With MTs 275/40/17 15psi I got 1.675,1.671,1.585 60FT with only three trys and very little heat.
I ran mine at 12 psi and could cut consistent 1.60's off my transbrake on motor. Could have done better but my converter was setup tight for a bunch of nitrous. And Nittos like ALOT of heat, don't be afraid to do a John Force burnout.
'88 Mustang GT--turbo project
'98 Camaro SS--10.6 @ 125
'97 Dodge Ram CTD--550 hp tow pig
'95 Civic DX--gas sipper