So here I am looking at these mech adv curves and I have the DUI stock curve which is for a high compression, iron head motor which has 24 degrees by 3000 rpm. Base timing recommended at 12 by DUI. Then I have the "performance" curve recommended for the 10:1 aluminum head motor which is 20 degrees by 3000 rpm, also with a base of 12. Doesn't that seem kind of backwards? The problem I'm having right now with the stock RAIII motor and the stock DUI curve is detonation at high RPM. Wouldn't that be helped by the "high performance" curve they've recommended? Also, I don't doubt that the "performance" curve would be fine for the AL head motor at 10:1, but it would seem that combo may tolerate the factory DUI curve better than the stock high compression iron head motor. This actually has me tempted to put the new weights and springs in the current motor and see what happens. My guess is it will be better.
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70 TA, 467 cid IAII, Edelbrock D-port heads, 9.94:1, Butler HR 236/242 @ .050, 520/540 lift, 112 LSA, Ray Klemm calibrated Q-jet, TKX (2.87 1st/.81 OD), 3.31 rear
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