Pure Stock Drag Racing tips & tricks

[Rowdy Rat]

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Would be cool to get an "early LT-1 cam" on a cam doctor see what's up.

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Rob & Sam,

Perhaps my first post on this subject was unclear, but this is exactly what I did. Like Sam, I was convinced that there was a difference between the original specification LT-1 camshafts and what Crane was providing to GM. In an effort to prove that theory, I had three cams checked on Jere Stahl's equipement... Cam #1 was an original cam removed from a 1970 LT-1 Corvette at 1,600 miles (I fully intended to use this cam in my own engine). Cam #2 was an original cam removed from a 1970 LT-1 Corvette at 67,000 miles (my own car). Cam #3 was a Crane supplied GM cam purchased a few months before it was discontinued.

After spot checking several intake and exhaust lobes, what I finally ended up proving was that all three were identical (there was some reduced lift on Cam #2, but I attribute this to it having 67,000 miles on it)... There was no difference between the original 1970 LT-1 camshafts and what GM was selling over the counter in 2000-2001.

I would fully expect an original 1971 LT-1 camshaft to be identical to the 1970 version. I would love to check a 1972 LT-1 camshaft though... Just to see if GM carried through the entire LT-1 production run with the same camshaft. My guess is that they did, but I'd still love to prove it just to satisfy my curiosity.

Regards,

Stan Falenski