I've got flat top pistons in my .040" 455/670 head combo and can't believe the difference a cam makes. The cam that I have now is a 290B-6 solid from Comp Cams and while at a cruise far away from my house I was forced (bad planning) to use some 93 octane gas to get home. I kept waiting to hear detonation but didn't. My last cam, a hyd Ultradyne 288/296 would have pinged like heck. Therefore, cam design can have a big effect on detonaton.
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http://www.youtube.com/watch?v=_qZgOpn-w-o <<< Burnout Video 
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"Treat Me Good, I'll Treat You Better; Treat Me Bad, I'll Treat You Worse"
Sonny Barger
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