carb jets

[timracer44]

what size jets should i run? i have a 2500 stroker with the 620 roller cam, efi intake 500 cfm holley. no porting or polishing. i started out with 70s and the plugs were soaked, i dropped down to 65 and there not as bad but still to much. im fouling out plugs every time i start it up. any suggestion?

[boportt]

i run 70 jets on my 500 holly and dont have no probs any chance u got a bad power vavle?

[timracer44]

im going to replace it 2morrow and get back with ya, thx

[boportt]

make shur ur air bleeds aint pluged too that'll maker run super rich

[little302]

A 620 roller, with.... did I read right? NO porting.What kind of head are you running. If its a steel head you are wasting your time with that cam..