Quote:
Originally Posted by mgarblik
I was told decades ago, "the engine will tell you what it wants". If you trust the dyno and the timing light they were using, than 35 degrees is what this total combination wants to run it's best. I agree that using this number and taking 2 degrees out is a nice little safety cushion if you don't have any type of detonation sensor system. Have never seen an engine ruined by running a couple degrees less than optimum timing. Couple degrees too much advance, damage could happen.
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Agree with this.
35 seems like a lot for those heads, but maybe the elevation plays into that. Also, your "ZERO" may be off a bit, if it was not verified.
Find where the motor runs best, and leave it there.
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'73 T/A (clone). Low budget stock headed 8.3:1 455, 222/242 116lsa .443/.435 cam. FAST Sportsman EFI, 315rwhp/385rwtq on 87 octane. 13.12 @103.2, 1.91 60'.
'67 Firebird [sold], ; 11.27 @ 119.61, 7.167 @ 96.07, with UD 280/280 (108LSA/ 109 ICL)solid cam. [1.537, 7.233 @93.61, 11.46 @ 115.4 w/ old UD 288/296 108 hydraulic cam] Feb '05 HPP, home-ported "16" D-ports, dished pistons (pump gas only), 3.42 gears, 275/60 DR's, 750DP, T2, full exhaust
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