Re: Pontiac 455 hp reduction
 

If a racer causes the hp increase then no it can't be reduced. If Nhra increases hp before it is introduced into their classification guide then yes it can get a reduction. Hope this is correct from what I was told by Nhra.

Re: Pontiac 455 hp reduction
 

So if the combo is deleted because GM never made it how is it that the Yenco Nova withe 350 LT 1 IS in the Guide Book

Re: Pontiac 455 hp reduction
 

Good question......above my pay grade

Re: Pontiac 455 hp reduction
 

That is the way the rule works now. If a certain combo gets HP then it is never eligible for a reduction. I was told that first hand when I tried to get a reduction on my combo. That Pontiac combo was not eligible by the rule as written.

Re: Pontiac 455 hp reduction
 

WOW ! 1st time I ever heard that. So, EXACTLY when did this rule take effect ? :confused:

Cause I'm positive that I know of factors that were increased, then reduced a couple of years later, & this was in very recent history.

That's all I'm gonna say about that.

And, who's to say NHRA couldn't just change that new rule ? How many rules have they changed ????????

Re: Pontiac 455 hp reduction
 

If I remember correctly it was about 3 years ago the change was made. Lonnie Grim did say they could use discretion on the HP ratings.

Re: Pontiac 455 hp reduction
 

My Olds 307 in Cutlass did not get reduction because of being hit. In my wagon I received 3 hp off. G body to B body platforms.

Re: Pontiac 455 hp reduction
 

Are you saying that Chevrolet didn't produce a COPO Nova with the LT1 350 in 1970? I'm pretty sure that one is well documented.

Re: Pontiac 455 hp reduction
 

NHRA used to provide the run data base with averages for each combo. It made it easy to understand their decisions. I wish they would post the date base and averages again.

Re: Pontiac 455 hp reduction
 

Back in the early 80's we ran a 73 GTO in Stock with an NHRA factored Hp at 350 non ram air and 355 with ram air . There was some confusion on the factory HP rating which originally came out at 310 , but was later reduced to 290 . Pretty hard combo to run because the parts are so rare .