Quote:
Originally Posted by Lee
You get spark knock with Edelbrock heads and only 10.25:1 compression? You must have over 40 degrees total - BACK IT OFF!
Also buy/borrow a wideband and check your AFR.
Personally, I'd put it on a chassis dyno with a wide band hooked up, and see how far off the tune is. Just getting the timing and jetting corrected could cure your cooling issues.
A 3000 cfm Black Magic shrouded fan and a BeCool 2-row were enough to keep my old iron head 469" (see signature) running 180 most of the time, in Houston heat.
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I have a wideband on it & can set my AFR at whatever I want. Right now it's set at 14.2 or 14.5 at cruise, 13.8 @ mid throttle, & 12.8 @ W.O.T. (iirc) I would have to look at what is programmed to be sure.