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Old 01-11-2013, 04:01 PM
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Originally Posted by techinspector1 View Post
Lots of ramp. That's the way the OEM's used to grind hot cams. Speed Pro, Melling and a few other grinders still do it that way. I like 'em. Easy on the valvetrain.

Tech

You were replying at the same time as me. So you are saying this is not uncommon and could be correct. I agree that it does appear that it would make a durable grind as it is a low ramp rate equating into lower pressures on the lifter/cam mating surfaces, push rods, rockers and valve stems.

If the Pat Kelly DCR number is accurate, then is 6.7 DCR a problem?

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  #17 (permalink)  
Old 01-11-2013, 04:27 PM
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Here is a more modern camshaft by Crane that has simular duration at .050 numbers:

Crane Hydraulic Flat Tappet Camshafts 113531 - SummitRacing.com

It is a good engine building practice to degree your cam. Timing sets off,crank key off,etc. Rarely do you find the cam itself ground wrong.

The intake lobe on that speed pro cam is lazier than the exhaust lobe.

I do not know how that cam will perform in your 327 but I think the Crane will be better. Shoot for 7.5-8 DCR
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