Cam Timing Guru Needed - The 1947 - Present Chevrolet & GMC Truck Message Board Network

DransportGarage · 12-23-2011, 01:06 PM

Q: If my intake open @ .006" is 26 degrees with 0 degrees (standard) camshaft timing, what should it be with +4 degrees camshaft timing? (The cam is a Comp Cams XE268H-10.)

I know this sounds like a stupid question, but I have a Zoom roller chain, and I can't determine which tooth to align when using the +4 keyway. The first picture below shows the obvious alignment using the 0-degree keyway. The second pic shows one possible alignment using the +4 keyway, but it results in 16 degrees. If I rotate the crank gear one tooth clockwise I get 30 degrees.

Thanks,
Bob

12-23-2011, 01:06 PM	#1
DransportGarage Registered User Join Date: Feb 2010 Location: Lebanon, Ohio Posts: 1,359	Cam Timing Guru Needed Q: If my intake open @ .006" is 26 degrees with 0 degrees (standard) camshaft timing, what should it be with +4 degrees camshaft timing? (The cam is a Comp Cams XE268H-10.) I know this sounds like a stupid question, but I have a Zoom roller chain, and I can't determine which tooth to align when using the +4 keyway. The first picture below shows the obvious alignment using the 0-degree keyway. The second pic shows one possible alignment using the +4 keyway, but it results in 16 degrees. If I rotate the crank gear one tooth clockwise I get 30 degrees. Thanks, Bob Attached Images



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