C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

how much to port plenum?

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Old Jan 24, 2005 | 03:07 PM
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C4Ownr24's Avatar
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Default how much to port plenum?

Does anybody know of a shop in the chicagoland area that will port my plenum? It's off of an '85 TPI motor. I just scored some new runners, and am planning on doing a 52mm throttle body. Anybody know how much porting the plenum will run?

Is porting the plenum really necessary to realize the performance gain inherent in the oversized runners?

thanks,
pablo
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Old Jan 24, 2005 | 04:55 PM
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If you can handle taking it off yourself you could always buy a ported one on ebay...
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Old Jan 24, 2005 | 05:07 PM
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Though I don't know that you will realize any power gains from the porting, it's always a good idea to have the air flow path matched.

If you don't have a Dremel or don't want to do the job yourself I think TPIS does porting.
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Old Jan 24, 2005 | 07:53 PM
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I sent mine to TPIS. It cost about $100. I believe they threw in a new intake air temp sensor as well.
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Old Jan 24, 2005 | 11:39 PM
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Originally Posted by HeeHaw89
I sent mine to TPIS. It cost about $100. I believe they threw in a new intake air temp sensor as well.
100 is fairly reasonable..
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