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Old 12-06-2017, 12:23 PM   #11
oldskool
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Default Re: Stocker build

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Originally Posted by Bob Shaw View Post
I was thinkin the 265 hp engine.
According to the Class Racer Info site, the 2 engines have different heads.

http://www.classracerinfo.com/Engine...5&MAKE=Pontiac

The 265hp engine is allowed 90cc heads. The 290hp engine is allowed 68cc heads. That's a lot of compression difference. Also, the 290hp engine is allowed a cam with more intake lift. Not sure how much power difference those 2 items would make. Would the difference be 25hp ?

Anybody have an educated guess ?

Last edited by oldskool; 12-06-2017 at 12:35 PM.
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Old 12-06-2017, 12:32 PM   #12
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Default Re: Stocker build

"...So, lets say he builds the car. What are the chances he could get the hp factor reduced to a reasonable number, and aprox how long would that process take ?..."

Would he have to run several div races ? Would he have to know somebody with pull, in the racing world or NHRA ? What exactly is involved in getting the hp factor reduced ?


So, any real world experiences that answer any or all these questions ?
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Old 12-06-2017, 08:28 PM   #13
Bob Shaw
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Default Re: Stocker build

Quote:
Originally Posted by oldskool View Post
According to the Class Racer Info site, the 2 engines have different heads.

http://www.classracerinfo.com/Engine...5&MAKE=Pontiac

The 265hp engine is allowed 90cc heads. The 290hp engine is allowed 68cc heads. That's a lot of compression difference. Also, the 290hp engine is allowed a cam with more intake lift. Not sure how much power difference those 2 items would make. Would the difference be 25hp ?

Anybody have an educated guess ?

The natural classes would be O/SA and Q/SA. That's .60 difference in the index. I don't think the 290 engine would be that much faster. You could always change heads and see how much difference that makes. The cam wouldn't make much difference.
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Old 12-08-2017, 08:02 PM   #14
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Default Re: Stocker build

Yeah, that makes good sense to me. May as well also strap on a Q-jet & see if it looks more competitive, than either 2-barrel engine. The Q-jet engines just seem to be more competitive, in most combos, unless you can get the hp factor lowered enuff.

I just can't think of a single competitive 2-barrel Pontiac Stocker, right now. Lots of competitive Q-jet combos.

http://www.classracerinfo.com/Engine...1&MAKE=Pontiac
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