Ported 317 Flow Numbers
10-10-2012, 12:09 PM
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Staging Lane
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Ported 317 Flow Numbers Just picked up a set of Mike Duke 317 heads for my turbo build and am unfamiliar with what flow numbers would indicate "good" . I have the flow chart for these heads, and wanted some input on the numbers. Thank you
10-16-2012, 08:24 PM
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Well it shows the intake port backing up after .600" lift. Not good.
This means the flow is turbulent and inefficient at that lift and port speed (which is probably too high).
If it backs up on a bench with only 28" of water it will probably backup at .400" lift when the engine is seeing 100+" of water during its actual operation.
I say make them fix the port speed (even if you lose a little flow) and you will find good power.
Good luck.
This means the flow is turbulent and inefficient at that lift and port speed (which is probably too high).
If it backs up on a bench with only 28" of water it will probably backup at .400" lift when the engine is seeing 100+" of water during its actual operation.
I say make them fix the port speed (even if you lose a little flow) and you will find good power.
Good luck.
