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Old 05-19-2025, 11:53 AM
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HWYSTR455 HWYSTR455 is offline
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Iron heads usually favor split duration profiles, leaning more towards the exhaust. There would be an improvement, how much is the question though.



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Old 05-19-2025, 12:33 PM
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Quote:
Originally Posted by HWYSTR455 View Post
Iron heads usually favor split duration profiles, leaning more towards the exhaust. There would be an improvement, how much is the question though.



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Maybe Steve can weigh in. The flow numbers I have show that the 670 doesn't flow as good on the intake as some other Pontiac heads do, but does flow better on the exhaust.

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  #23  
Old 05-20-2025, 07:34 AM
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I got this off the Wallace site, 670 & 16 casting comparison.


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Theme Song: http://www.youtube.com/watch?v=7zKAS...ature=youtu.be
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