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Reply to "A(nother) Bridge Too Far"

Thanks for that, Stan. Very useful cam theory detail. Your second from last paragraph is what I was looking for; trying to extrapolate whether you’d have piston-valve clash or other broken parts scenario.

and I asked since it’s probable that most builders would never notice this mfg error in assembly. Who checks to see that the intake and exhaust lobes are actually ground from the same centerline?

I’m thinking almost anyone else would’ve got it together, started it up, and subsequently gone crazy trying to get a good tune. But how would it have behaved? Weak bottom end? Low compression? Pinging? Strong to 5k then lays down like a baby?*

As you say, it’s just one more hazard for the typical hobbyist.
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*I recall a big block chebby build Car Craft did in the 80s that did that; turned out the cam mfg shipped the wrong valve springs. No one was the wiser until the third pass down the quarter mile.

 

 

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