11.4:1 455 need some help, i think
I'm building a 455 with 11.4 to 1 compression my engine guy is confident I'll be able to run standard pump gas which around here is 91 octane but he's a race guy and I drive mine as a daily I do get into it every now and again at the local track but I think I'm going to have issues with the 91 octane on a Tri-State Cruise.
Here's a rundown of what I'm building:
1974 455 block decked to .005
1.5 harland sharp roller rockers
3/8 trick flow pushrods
74cc KRE D-port heads as cast 260cfm
Sealed power forged .030 pistons+6.7 / 4.1815 bore
Shot peened OEM crank
Shot peened OEM connecting rods 4.210
Cometic MLS head gasket .040
Comp cams evolution hydraulic lifters
Comp cams thumper roller cam 51-602-11
Holley Sniper EFI 800cfm
Last edited by Scubasteve95; 09-21-2023 at 01:52 AM.
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