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Power Strokes
7.3 Aftermarket
7.3 Performance Cam
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[QUOTE="DocBar, post: 65688, member: 433"] From what I can tell with the DI cam in my truck, the idle is just about exactly the same as stock. Therefore, all I can deduce is a SLIGHT lengthening of the duration for intake and exhaust. I've raced many, many sooped up gassers in the 11-12 second range and there is absolutely no comparison between the feel of the vehicles. All I need to run mid-low 12's with my truck is a bigger turbo. This leads me to believe that the only difference between a stock and aftermarket cam is slightly longer duration. Any extra lift and you're getting into fly cut pistons or shortened compression. I have crower rods and Mahle pistons in my truck, but they should be stock length and maybe slightly overbore. The crank is stock stroke. That leaves very little else to make any gains. Maybe my cam will pull a FEW extra HP on the top end with a slightly longer duration on intake and exhaust. I'm not sure it's worth it except on pure competition motors. [/QUOTE]
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