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Old 01-07-2009, 10:50 AM   #15
art leong
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Default Re: Runner Volumes

Quote:
Originally Posted by Bart Kilraine View Post
We pay a horsepower penalty for those heads,I'd rather run the steel heads.The runner volumes are bigger in the after market heads......that's why the horsepower difference! All you people finding all these heads with way bigger volumes listed, since the '70's are mostly full of ****.
Bart I used to feel this way to, but not as brazen. But I was not up to snuff on the valve changes and the bottom angle (bowl porting) vavle jobs. Now allowed by nhra. It is totally possible that a stock (unmassaged) head can go over the cc's. If I had a (really) legal head and it was kicked out because of what nhra allowed me to do I would be more than upset.
On the other hand the massaging of the head stuff started back in the 70's and has been a snowball rolling downhill ever since.
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