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In all the cam catalogs they will show a cams operating range like 2500 - 7000 rpm. But those are always for stock or nearly stock displacement engines. So with my 494 what would be a good rule of thumb for adjusting the operating range of the CAM or is there one?

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Quote:

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In all the cam catalogs they will show a cams operating range like 2500 - 7000 rpm. But those are always for stock or nearly stock displacement engines. So with my 494 what would be a good rule of thumb for adjusting the operating range of the CAM or is there one?

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Big motors like big cams, they really mask the duration and overlap that a smaller motor will see and limit the idle quality and throttle responce. Any grind under 260 at .050 and ground on a 108 or 110 lobe center will work, more lift the better This is a very general statement so keep that in mind, your always better off in dealing with a competent source(cam grinder, engine builder of motors like yours) of informamtion when picking cam grinds :scopeout

Quote:

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In all the cam catalogs they will show a cams operating range like 2500 - 7000 rpm. But those are always for stock or nearly stock displacement engines. So with my 494 what would be a good rule of thumb for adjusting the operating range of the CAM or is there one?

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Plus where its installed at will change the rpm
(advancing it will lower the rpm for max power)