Why do the 113 heads flow less than the iron L98 heads
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Joined: Oct 2002
Posts: 1,866
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From: Salem, NH
Car: 1999 Z28
Engine: LS1
Transmission: 4L60E
Axle/Gears: 3.23 10 Bolt
Why do the 113 heads flow less than the iron L98 heads
Curious why they flow less and what kind of work is needed to make them flow the same as the iron heads.
Edit: I believe i got bad info from the thread i read regarding 083s vs 113s but in case its correct i would like to know if there is any loss in flow with the 113s. I know the combustion chambers are smaller (58cc).
Edit: I believe i got bad info from the thread i read regarding 083s vs 113s but in case its correct i would like to know if there is any loss in flow with the 113s. I know the combustion chambers are smaller (58cc).
Last edited by SLP IROC-Z; Aug 17, 2024 at 04:24 PM.
Joined: Mar 2014
Posts: 4,553
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From: South Ms
Car: 89 Firebird
Engine: 355 TBI
Transmission: 700R4
Axle/Gears: 10 Bolt.Posi-3.73s
Re: Why do the 113 heads flow less than the iron L98 heads
About the same on intake but the 113s flow better on the exhaust side IIRC.
Joined: Jan 2005
Posts: 10,416
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From: Hurst, Texas
Car: 1983 G20 Chevy
Engine: 305 TPI
Transmission: 4L60
Axle/Gears: 14 bolt with 3.07 gears
Re: Why do the 113 heads flow less than the iron L98 heads
Depending on the 113 casting they actually flow better than Vortecs especially the Mexican ones. The GMPP 113s had some factory work done on them and outflowed the Mexican 062s sold since 2005 era.
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