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Usage of "high lift" cam with 477 piston

Hitchcock made us aware that it is advisable to check if the valves run against the pistons if you use ANY kind of "high performance" cam as they may touch at or near TDC (OT in German).

So far none of the 477 users has experienced any problems with that but it is advisable to check and if needed add another foot gasket to give it more room or if the needed tools (dremel) are available deepen the nudge in the piston.

All high lift cams currently on the market have been tested  (H., TEC and ours) and none touch the 477 piston.

 

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