Super tuning car runs good shooting for great
I assume you have closed chamber heads. Also assume your pistons are near zero deck and your using approx .040 thick head gasket. If all my assumptions are correct you have a quench motor and 200 psi is ok with the proper tune.
As mentioned you need to look at the porcelain for metallic specks.
The 4 speed and 3.91 is in your favor (no engine lugging)
I run a 360 Magnum OEM pistons and heads, [email protected] cam 108 LSA 106 ICL, 200 psi cranking compression on 89 octane. 27* initial, 34* total, 48* with Vacuum adv highway cruise AFR 14.5 with no issues. Car was dialed in with wideband and slowly advanced timing and leaned fuel curved until it was dialed in.
Distributor is modified to limit max Vac Advance. Adjust can allen screw for when advance starts, adjust max advance stop (4-40 mach screw and lock nut) for how much. See mod picture.
I assume you have closed chamber heads. Also assume your pistons are near zero deck and your using approx .040 thick head gasket. If all my assumptions are correct you have a quench motor and 200 psi is ok with the proper tune.
As mentioned you need to look at the porcelain for metallic specks.
The 4 speed and 3.91 is in your favor (no engine lugging)
I run a 360 Magnum OEM pistons and heads, [email protected] cam 108 LSA 106 ICL, 200 psi cranking compression on 89 octane. 27* initial, 34* total, 48* with Vacuum adv highway cruise AFR 14.5 with no issues. Car was dialed in with wideband and slowly advanced timing and leaned fuel curved until it was dialed in.
Distributor is modified to limit max Vac Advance. Adjust can allen screw for when advance starts, adjust max advance stop (4-40 mach screw and lock nut) for how much. See mod picture.
