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Author Topic: oval port or rectangle port?  (Read 3086 times)

Offline kayster

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oval port or rectangle port?
« on: November 16, 2010, 08:28:29 pm »
Hey folks..Im buildin a 454...I'm tryin to determine what heads to use..I just had a well known engine builder tell me that oval port will be the better option for this build.. I'm strokin it to a 496 and shootin for 625hp...Why is oval gonna be better than rectangle.. goes against all i've ever know about heads..? Any input would be great..
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Offline VileZambonie

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Re: oval port or rectangle port?
« Reply #1 on: November 16, 2010, 08:35:30 pm »
I run large oval ports
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Online Captkaos

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Re: oval port or rectangle port?
« Reply #2 on: November 16, 2010, 08:54:21 pm »
For street applications Oval ports are better.  Rectangles are better if you are planning to make high rpm power.
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Offline ccz145a

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Re: oval port or rectangle port?
« Reply #3 on: November 17, 2010, 01:51:17 pm »
large oval keeps the velocity up compared to rect and will be more responsive under 5500 rpm
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1975 C10 Silverado LWB, 454CID, TH400, 10bolt 3.42
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