Milling 317 heads
09-20-2013, 12:04 PM
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Milling 317 heads Could anyone tell me what's the most you can mill the 317 heads combustion chambers without creating any issues with PTV clearance using a camshaft lift of around 617/624.
09-22-2013, 12:32 PM
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Its not lift that primarily causes PTV issues its LSA, duration, ICL. You can mill 6cc off without causing any issues with intake manifold alignment but PTV should be checked and flycutting may be necessary.
