Thread: 1971 350 street racing motor

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i've seen two cars come into the shop in just the last month that had engines built with hypers, and on both of them 1 cylinder had a detonation, and the piston shattered, and not just made a mess, took out the cylinder wall and the head above..... forged is really the way to go....

The desireable thermal expansion properties of the hyper pistons is far outweighed by the superior toughness and fatigue life properties of forged pistons. This is especially true for high performance applications.

I noticed a gear drive. Is this for the noise value? A blower would certainly not need any extra noise. Gear drives can in some cases lead to premature valve train failures due to vibrational harmonics (I have heard but not analyzed personally) they may introduce in the system. I sincerely believe there is some merit to this. Personally I would tend to stay away from this and use a Cloyes true roller set or a belt drive system ($$) if you really desire tuning flexibilty.

Regards, Kitz