CLASS RACER FORUM - View Single Post - GM contact information for camshaft specs?

ss3011 · 07-31-2012, 06:00 PM

The IHRA Rule Book says:

Aftermarket Cams allowed as per horsepower claimed. Must check on or under factory specs for lift, duration, and overlap.

This sounds to me like our old stocker cam specs, back in the 80's. Most of the old cam specs were listed on the Engine Blueprint Sheets along with the checking clearances. Most of that info was removed when NHRA went with the lift only rule.

07-31-2012, 06:00 PM	#8
ss3011 Senior Member Join Date: Feb 2002 Location: Southeast Michigan Posts: 909 Likes: 70 Liked 239 Times in 114 Posts	Re: GM contact information for camshaft specs? The IHRA Rule Book says: Aftermarket Cams allowed as per horsepower claimed. Must check on or under factory specs for lift, duration, and overlap. This sounds to me like our old stocker cam specs, back in the 80's. Most of the old cam specs were listed on the Engine Blueprint Sheets along with the checking clearances. Most of that info was removed when NHRA went with the lift only rule.