Posted By: cwilson66
new to the forum 383 question - 04/16/20 11:07 PM
Hi there guys and gals, new to the forum, my names connor, im putting together a 383 i picked up for a great deal.
its .030 over 383 and it was build 20 odd years ago was told it was a high compression engine with only a couple summers of run time. Before dropping it into my car i figured id tear it down, check it out and re seal it.
well it looks fantastic inside, like new.
a 509 purple cam, bearings and cylinders, all look fantastic.has a old eddy Tm6 single plane intake.
i pulled the 906 heads and found old school 7023P domed pistons .020 in the hole.
after doing some math i figured out the compression to be right around 11:1 little too high for the pump fuel of today, especially with iron heads.
So i want to run a thicker head gasket. the ones that were in it are felpro 1009's .039 thick 4.410 bore.
if i ran a felpro 1105 with a thickness of .051 and bore of 4.590 that would bring my compression down to 10.4, a better chance of running this thing on 94 octane. can i get away with running that large of a gasket bore with a 4.280 cylinder bore?
thanks everyone.
its .030 over 383 and it was build 20 odd years ago was told it was a high compression engine with only a couple summers of run time. Before dropping it into my car i figured id tear it down, check it out and re seal it.
well it looks fantastic inside, like new.
a 509 purple cam, bearings and cylinders, all look fantastic.has a old eddy Tm6 single plane intake.
i pulled the 906 heads and found old school 7023P domed pistons .020 in the hole.
after doing some math i figured out the compression to be right around 11:1 little too high for the pump fuel of today, especially with iron heads.
So i want to run a thicker head gasket. the ones that were in it are felpro 1009's .039 thick 4.410 bore.
if i ran a felpro 1105 with a thickness of .051 and bore of 4.590 that would bring my compression down to 10.4, a better chance of running this thing on 94 octane. can i get away with running that large of a gasket bore with a 4.280 cylinder bore?
thanks everyone.