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Old 03-13-2008, 12:53 PM
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Racing Motor - Cam selection

So here's another thread about selection for my camshaft. I am building a 283 for circletrack motor and am meant to be leaving the enginge stock as equipt from factory! Now obviously nobody does that unless you're really green The rule that I have to keep with is the 15" of vacume at 800 RPM. Other than that someone will have to do a tear down of the motor and then check grind numbers to check the camshaft.

Here are the two that I am looking at and then I have a few questions.

Comp Dual Energy 12-208-2 Summit Racing Link

Comp XTREME Energy 12-238-2 Summit Racing Link

I am already planning to use Rhoads lifters to help on the idle quality and vacume readings. Here are my questions:

What is your recomendation among those two camshafts? I have to run stock manifolds exaust (center dumps) and intake. I have unmodified 60cc chamberd GM heads and my 283 is not bored. Do you think the vacume will be alright?

The notes on both the camshafts say [2] Requires machining on cylinder heads. *** does that mean? could they be a little more ambiguious? What will need to be machined?


Last edited by Bull_81073; 03-13-2008 at 06:28 PM. Reason: correction
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Old 03-13-2008, 11:07 PM
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No ideas? I usually get a near immediate response! I was hoping for some feedback since I need to start buying my parts!
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