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Why do people insist on spinning way past the powerband????



Usually for a better et.


That usually don't happen because they are spinning too far past the power band and would et better to shift earlier and save on part to boot.
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How do we know what rpm he's making power until? With crap flowing stock heads he's done way before 6k. If nicely ported he could be making power up to there.


Not with the 509 cam he won't be.




different animal maybe but i had a 383 w/ a 509 that i shifted at 6800 for best et. It had ported 915 heads, 509 cam, 10.5:1, torker II intake, headers, 750DP I also ran 40* of timing. I listen to a guy once say i had to much timing so I backed it off and it ran 3 tenths slower, I also listen to a guy tell me I was shifting to high so I shifted at 6400 and it went slower... my piont is you can set the car up, but until you drive it hard you won't know what to shift at or how to tune it. go WOT and when you feel it fall off or falten out shift it, that will be your shift point. The 509 cam has an advertised operating rang of 2600-6000rpm. Your shift point can be anywhere from 5800-6400