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I misplaced my Comp catalog and need to know the general specs and the overlap for this cam, can anyone help me with this information? Thanks in advance,
Bill
 

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Calculating Overlap

Since cam cards are readily available online these days, there's no reason for asking us to find the information for you.
Cam cards may not publish the overlap directly, but it's easy to figure out.

Add Intake open (37) plus exhaust close (34) = 71 degrees overlap.

I'm not sure if Pat Kelley's alternate overlap calculation always works but with it you can also estimate overlap just from the seat to seat duration and LSA if you don't have a cam card.
Most Comp Cams have 110 LSA and the advertised duration is close to seat to seat.

Add the intake and exhaust advertised durations
Divide the results by 4
Subtract the LSA
Multiply the results by 2

Using 292 as seat to seat duration:
292 Intake+292 Exhaust= 584
584/4=146
146-110= 36
36+2= 72

Obviously the overlap from the cam card and the calculation differs slightly but it would be ok for quick comparisons.

For more information on overlap and engine operating characteristics,
here's a good Jeff Smith Hot Rod online article on overlap and lobe phasing
 

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According to David Vizard, these are the valve timing overlap ranges that are most likely to work correctly:
  • Trucks/good mileage towing 10-35 degs overlap
  • Daily driven low rpm performance 30-55degs overlap
  • Hot street performance 50-75 degs overlap
  • Bracket/oval track racing 70-95degs overlap
  • Dragster/comp eliminator engines 90-115 degs overlap
http://www.empirenet.com/pkelley2/Overlap.html
 

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comp cams

makes one of those on a 108 LSA or a 106 LSA instead of the every day , ho hum 110 LSA , i'd call 'em and see which one you would like the best
 
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