GM contact information for camshaft specs?
 

I have a 2004 Corvette coupe auto that according to Mike Baker currently can't run in Pure Stock because IHRA doesn't have the complete camshaft information. Does anyone know who I would contact to get him this information and is it worth my effort meaning will I keep running into dead ends? Based on the C5 crowd this car could easily run 1 second under the index with very little effort and still be street driven. Any help would be greatly appreciated!

Scott

Re: GM contact information for camshaft specs?
 

NHRA lists all motors 2004 with cam lift forward it to Mike B

Re: GM contact information for camshaft specs?
 

Are you talking about the NHRA Technical Specifications Bob?

Re: GM contact information for camshaft specs?
 

Also, since it's Pure Stock, won't they need more than just just the lift (which the Technical Specification sheet shows) since you have the run the OEM cam and can't change duration, etc.?

Re: GM contact information for camshaft specs?
 

Yea you mite be right, try a google search of that year corvette you should be able to find all that info in gm ads and spec's sheets. I have sheets from older cars that I found on google. print out what you find and send it to Mike, that way he will see where it came from.

Corvette LS1
97-98 12554710 199/207 .472/.479 117
98-99 12560964 199/207 .472/.479 117
2000 12560968 198/209 .500/.500 115.5
01-03 12561721 198/207 .467/.479 116

Corvette LS6
2001 12560950 204/211 .525/.525 116 385hp
02-04 12565308 204/218 .555/.551 117.5 405hp

If I had more time I would give you a link just serach 2004 corvette cam spec's

Re: GM contact information for camshaft specs?
 

Look down this list, got to go

http://www.oocities.org/motorcity/do...00/cmspec.html

Re: GM contact information for camshaft specs?
 

Pure stock has to check lift,duration and overlap and springs have to check stock pressure also at right installed height and open also
Mike Taylor 3601

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.

Re: GM contact information for camshaft specs?
 

That's right IHRA pure stock has got to point to where it is same as pre 1986-87 stocker except for have to have mufflers w/headers they can't be straight thru type have to be baffled,also no additional stroke on crank can't be over stock stroke
Mike Taylor 3601

Re: GM contact information for camshaft specs?
 

Ok, so far no luck. If I'm reading this list correctly it was edited in 2001 so it won't have the cam specific to my 2004 model. Also, stopped by a Chevrolet garage (suggestion from Mike Baker on where to start) thinking perhaps if we found the cam in the parts section it would have specs. No such luck. Any other suggestions? From already messing with this car I think with a modest gear, converter, headers, CAI, and tune it would run a second under on DOT drag radials, still get 25mpg, and have AC, etc.