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Old 09-28-2009, 02:22 PM   #21
X-TECH MAN
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Thumbs up Re: IHRA coming to my local track PBIR, Can I run in any of the classes?

Quote:
Originally Posted by Tweaker View Post
so lift has to remain stock lift in stock elim? i dont think their are any aftermarket cam's out for my car that remain the stock lift ..


Intake Theoretical valve lift @ 0 lash -11.166 mm (0.439 in)

Exhaust Theoretical valve lift @ 0 lash -11.066 mm (0.436 in)

im seeing aftermarket cams with lifts of .492, .470 .480.. bummer man stock elim class is tough :P
The "STOCKER" grinds are usually custom ground and not "Off The Shelf" items or in a catalog. You have to call a company like Comp Cams and talk to Chris Pagent (speling?) and see what he can come up with for your car and engine. The other problem is the Detroit Manufacturers have stopped supplying NHRA and IHRA with duration and overlap spec. for the last several years along with spring pressure specs since the cam and spring rule was changed in 1985. The class was originally intended for the older style stockers that IHRA still has specs for such as 1949 Olds, 55-57 Chevys, 389 Pontiacs, 348 and 409 Chevys, etc.In other words it seems you would be able to use a current "stocker" grind and get away with it although they really suck as a street cam (no vacum). You should call Mike Baker (tech director) at IHRA for conformation of what Im posting on this site to be sure. Its been about 8 years since I have worked with the assoc. He's a good guy and will work with you and your combination. Danny Waters Sr.or Hank Blankenship are also good guys who would help out. Hank is the guy you would probably end up dealing with IF you had to go to tear down (yes it happens on occasion) to be certified as legal. You can also get the engine specs from them to give you what you need to know for the head C.C.'s, deck height, valve size and etc. Good luck.
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