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Blue Blur

Forged Piston Valve Reliefs

the radial clearance will be very close. Max lift has nothing to do with clearance FYI. At max lift, the piston is not at TDC. Duration, ramp rate, and ICL are the biggest determining factors. Also the free-drop on an Apache is less than that of a 6.1 head. Clay it up and verify but I think the radial clearance will be the issue.

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I emailed you Andy, thanks for the advice. Think I will just run the 6.1's after I ship them to Weber for his cnc program. The power it puts down with those will probably hurt the 8 3/4 rear as it is.

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