67 Precision should spool close to 3k with smaller exhaust housing like .68 and won't drop till 6k if you have good valve springs.Very nice thanks man. I talked to you on youtube actually. Im debating on getting the Presicion 67mm Cast wheel turbo when I buy the On3 turbo setup. Just curious on where itll hit full boost (6-9psi) and where itll drop off.
Cool good info, the longblock is completley stock, but after the turbo build Ill do a built setup. I want something that will hit full boost early, and not fall off up top. So well see, thanks for the info.67 Precision should spool close to 3k with smaller exhaust housing like .68 and won't drop till 6k if you have good valve springs.
My new setup is built 4r70w with trans brake , mvb and Precision T7075HP. Trans should go in end of this week or next. New turbo kit be here tomorrow.
i have the new forward facing kit on my bullitt. i haven't dyno'ed it yet but its making 10 psi and feels really strong. on the stock block with conservative timing at 16*. i will dyno it once the tuning is all done. it spools at 2200-2500rpm and full boost 2500-3000rpm.
it feels alot faster than when my car made 370whp on a vortech.
Thats a great number with 2v. Congrats !! Here is my final number with auto and full exhaust, car is down for some change.Thread revive...
Stock 03 Cobra short block under worked 2v heads, ff On3 kit w/76mm precision turbo (turbo numbers in red,old Procharger F-1 in blue)