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

113 Head Flow Numbers

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Old Sep 10, 2024 | 12:58 PM
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Default 113 Head Flow Numbers

Just putting this out there in case anyone ever runs across it. Building heads for the new champ car motor (L98). Getting what I can out of the 113 heads. This was some light port work with moderate bowl work. First numbers are before second numbers are after:






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Old Sep 10, 2024 | 11:50 PM
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Very interesting. Good data to have for sure. Thanks for posting!

Nice gains on the intake side! That's where these heads need help. Who did the port work? Do you have any before and/or after pics? Or port volume measurements?
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Old Sep 11, 2024 | 01:16 AM
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Stan Weiss' - Cylinder Head Flow Data at 28 Inches of Water -- DFW / FLW Flow Files for use with Engine Simulation Software (erols.com)
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Old Sep 11, 2024 | 07:38 AM
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Nice job on the port work, good increases!
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Old Sep 12, 2024 | 10:01 AM
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Originally Posted by C4industries
Very interesting. Good data to have for sure. Thanks for posting!

Nice gains on the intake side! That's where these heads need help. Who did the port work? Do you have any before and/or after pics? Or port volume measurements?
No pics. Fast-Cat porting service; Dennis is absolutely top notch.

Dennis first recommended I talk to Lingenfelter as they had a CNC program to open up the 113 heads and they could probably get more for the same price. I checked and to my surprise they did. Went three days later to order/buy and it was then off their website. Called them and apparently they completely roached a set of heads and found their CNC program was corrupt so they no longer offered the service.

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