Valve To Piston Probs??
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RE: Valve To Piston Probs??
What has the cam manufacturer said about clearance and springs? Presumably that would be the best source of information since he knows the cam timing, ramp profile, etc. to determine if the cam will work with stock springs, and if there are clearance issues or not with your pistons.
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RE: Valve To Piston Probs??
The best way to determine if youre going to have a problem is to look at the lift @ TDC which most cam manufacturers are listing next to the timing and lift specs. Max lift usually has nothing to do with piston to valve clearance since the piston is almost at the bottom when max lift occurs. The detirmining factors are intake opening and exhaust closing (how far the valves are off the seat during and near overlap). Most of the smaller cams fit with plenty of room to spare.
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RE: Valve To Piston Probs??
SIT: Good luck. Personally I'd contact BOTH Andrews and HD tech in Milwaukee before I'd risk busting a spring on what for HD is a relatively high lift cam--and if you check the valve spring specs in your HD SM you will see they are passed for installation with a substantial variance in spring pressure.
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