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read a cam spec chart

wrencher21

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hello i would like to know what is my cam timing for this cam ? i think it is 2 deg advanced can anyone say this is true .
 

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If it is the #60302 it has a 112 lobe seperation and installs on a 108 intake centerline so it would be 4-degrees advanced. The intake valve opens (0.050" lobe lift) 2-degrees before top dead center, and closes 38-degrees after BDC, again the duration number is at 0.050" lobe lift. Take the 2-degrees plus the 38-degrees plus 180 and you get the 220 advertised duration at 0.050"
 
If it is the #60302 it has a 112 lobe seperation and installs on a 108 intake centerline so it would be 4-degrees advanced. The intake valve opens (0.050" lobe lift) 2-degrees before top dead center, and closes 38-degrees after BDC, again the duration number is at 0.050" lobe lift. Take the 2-degrees plus the 38-degrees plus 180 and you get the 220 advertised duration at 0.050"

Isn't "Advertised" duration usualy calculated from .060" lift? And NON-advertised duration or "duration at .050", calculated from .050" lift?
 
Isn't "Advertised" duration usualy calculated from .060" lift? And NON-advertised duration or "duration at .050", calculated from .050" lift?
advertised duration numbers will vary on hydraulic flat tappets between .000-.008. crane was .0042, comp cams .006, engle .008. the trw, speed-pro, elgin, etc include the ramps in their numbers so they are probably .000 or very close. there is a similar situation with mech flat tappets.
 
advertised duration numbers will vary on hydraulic flat tappets between .000-.008. crane was .0042, comp cams .006, engle .008. the trw, speed-pro, elgin, etc include the ramps in their numbers so they are probably .000 or very close. there is a similar situation with mech flat tappets.

OOPS,,, I forgot a "0" in my .006" lift..... I just got that from conversation with a few different cam manufactures that I've spoke with over the phone a while back. They seem to agree that "most" of them follow that practice, but it's hard to say for sure how accurate they are with this figure/measurment procedure.
 
Maybe do a screen shot of the web page and post the pic? Funny how the info didn't get transferred over - damn computers!
 
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