Re: Small Block 400 Buildup-Need Info. on Pistons
There's more detonation resistance in tight quench than hidden horsepower because it lets you run more compression and helps ward off detonation. It's a longevity issue, not power.
OK. I did a cold compression check on my motor and it was between 215 and 230 psi. I don't have any detonation on 91 octane pump gas at 38 or 40 degrees total timing all in by 2,500 rpm.
Does quench have more influence on detonation than vehicle weight and or gearing?
What I'm really trying to get at is - Has anybody quantified
the benefits of improved quench? If so, I'm interested in the results. Like, you were able to increase DCR by X amount without detonation, or you were able to use 89 octane with the same DCR that used to detonate on 91 octane?
'69 Camaro - 429 SBC Dart Iron Eagle 9.325" block, Crower crank, Crower 6" billet rods, Ross pistons (10:1), Total Seal rings, AFR 245 heads, T&D steel body shaft rockers, Cloyes Timing set, custom ground 4-7 swap solid roller 274/286 @ .050" with .704" lift, Dart single plane, Holley Dominator EFI on E85, Injector Dynamics ID2000 Injectors, Stef's #1705R oil pan, F2 Procharger, Lemons 2" primary 4" collector, ATI 9" blower converter
Last edited by Steve69SS396; Feb 9th, 07 at 05:07 PM.