LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

Port and polish

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Old Aug 20, 2003 | 03:46 PM
  #1  
976speed's Avatar
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Port and polish

I am thinkin about getting my heads ported and polished on my 97 Z28. How much hp will i gain and how much would i be spending to get it done?
Old Aug 20, 2003 | 04:04 PM
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That's really an unanswerable question you're asking. It is all dependent on what you have done to the car, and what you're planning to do along with the heads? If you're a bolt on car with a full exhaust and just doing heads only, I'd presume that you may see 30-40 on a really well done set of heads. But if you're adding a cam or something else, who knows. It's all in the flow characteristics of the heads, not the "peak" flow numbers. Mid lift numbers are more inportant than peak. But anyway, give us an idea on the setup you're going with and you'll probably get some positive responses with people who have a like setup.
Old Aug 20, 2003 | 07:08 PM
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From: looking for a flow bench so Brook and I can race
Originally posted by Fastbird93
That's really an unanswerable question you're asking. It is all dependent on what you have done to the car, and what you're planning to do along with the heads? If you're a bolt on car with a full exhaust and just doing heads only, I'd presume that you may see 30-40 on a really well done set of heads. But if you're adding a cam or something else, who knows. It's all in the flow characteristics of the heads, not the "peak" flow numbers. Mid lift numbers are more inportant than peak. But anyway, give us an idea on the setup you're going with and you'll probably get some positive responses with people who have a like setup.
its not even in the flow numbers, especailly if its a low reving motor.
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