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  #16 (permalink)  
Old 01-31-2011, 07:04 PM
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Actually Yes. If you look at them they are very much designed to do what vortec heads on a chevy do.Create swirl. The chambers look very similar to the chevy, and In My opinion ( wich is an opinion) actually look better shaped and have the spark plug canted towards the exhaust wich is also better for combustion.Just My opinion of course.Obviously a far superior head compared to a stock chevy votec head. But that is my opinion of course.Any body else?

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  #17 (permalink)  
Old 01-31-2011, 07:06 PM
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Quote:
Originally Posted by latech
Actually Yes. If you look at them they are very much designed to do what vortec heads on a chevy do.Create swirl. The chambers look very similar to the chevy, and In My opinion ( wich is an opinion) actually look better shaped and have the spark plug canted towards the exhaust wich is also better for combustion.Just My opinion of course.
So they copied the Chevy head?
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  #18 (permalink)  
Old 01-31-2011, 07:08 PM
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Quote:
Originally Posted by V8&4spd
So they copied the Chevy head?
You would have to ask Vic Edelbrock that question. But I think he did his own homework
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Old 01-31-2011, 07:16 PM
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This is a Pontiac D port intake gasket on a Chevy Vortec head and on a Pontiac D port head. You be the judge.
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  #20 (permalink)  
Old 01-31-2011, 07:18 PM
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the flow on the eddys is better than the stock vortec and the real edge is the chamber shape and plug location. The shape makes little difference when the flow numbers come in
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Old 01-31-2011, 07:20 PM
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runner size and the narrow section of the runner have more to do with flow than the simple port shape betwen the intake and the head
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  #22 (permalink)  
Old 01-31-2011, 07:22 PM
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and that is fact, not my opinion
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Old 01-31-2011, 07:23 PM
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What are the flow numbers before porting? The Chevy Vortec was made for a 305 and 350 engine. The Pontiac D port head is one size fits all.
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  #24 (permalink)  
Old 01-31-2011, 07:24 PM
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Dont get me wrong , chevrolet builds a great engine. I just dont want to raise the hood on my pontiac and see one.
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Old 01-31-2011, 07:27 PM
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Parts is parts.
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  #26 (permalink)  
Old 01-31-2011, 07:28 PM
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Quote:
Originally Posted by V8&4spd
What are the flow numbers before porting? The Chevy Vortec was made for a 305 and 350 engine. The Pontiac D port head is one size fits all.
Good point.
Hummmmmm.
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  #27 (permalink)  
Old 01-31-2011, 07:29 PM
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I guess there bigger to feed a bigger engine, right outa the box.
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  #28 (permalink)  
Old 01-31-2011, 07:31 PM
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Quote:
Originally Posted by latech
I guess there bigger to feed a bigger engine, right outa the box.
What are the flow numbers for both? It should not be hard to find them. You can't compare apples to oranges without the numbers.
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  #29 (permalink)  
Old 01-31-2011, 07:38 PM
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I agree. You cant compare apples to oranges.
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Old 01-31-2011, 08:25 PM
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Quote:
Originally Posted by V8&4spd
What are the flow numbers before porting? The Chevy Vortec was made for a 305 and 350 engine. The Pontiac D port head is one size fits all.
ever see a low compression 455 head run on a 326? without forced induction?
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