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Old 07-27-2012, 09:29 PM
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If you were willing to mock up the motor w the heads, using the cam you got now (with solid lifters)
degree the cam in accuratly and then make some very precise valve to piston clearance and valve open at TDC measurements, you can interpolate what the new cams VTP clearance will be.

VTP clearance is usually closest at around 10deg BTDC and 10deg after TDC.
The exhaust side is the critical spec as the piston and valve chase each other.

May people have notched the piston valve relief deeper and larger radius by hand using a die grinder and 3M discs on a assembled motor with some creative house keeping and masking.
Its not that hard to do.
Any amount of hand releiving needed to get good VTP clearance will be small.
Again the exhaust is the critical factor. You can move the new cam around a bit too to gain clearance.
You need not sweat over this.

When looking at cams this big (duration) you should strongly consider running a mechanical street roller cam.
More power, easy lash setting maintenance. More rpm. These street roller cams are low noise and easy to keep set.
and always out perform a hyd roller.

Last edited by F-BIRD'88; 07-27-2012 at 09:38 PM.
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