81mm vs 88mm dyno #'s

[tom j]

It made 750hp@18psi with a gt4281(custom turbo) what do you think the gains will be at the same boost with a gt4788. TA block, gn1r heads, xfi ect.. I'm going to try to make it to the dyno this weekend.

 

[2QUICK2B6]

who ported your heads ? maybe 20-30 hp ?

 

[tom j]

I don't know who ported the heads, but I think they came from hartline.

 

[Reggie West]

825 at the wheels you will have to spin up to 30 psi or so