V6 Discussion and questions about the base carbureted or MPFI V6's and the rare SFI Turbo V6.

Flow Characteristics of Stock Gen I Iron Head

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Old Feb 18, 2020 | 07:19 AM
  #1  
Whitebird75's Avatar
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Joined: Apr 2018
Posts: 122
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From: Atlanta, GA
Car: 1988 Pontiac Firebird
Engine: 2.8 L V6
Transmission: 700R4
Flow Characteristics of Stock Gen I Iron Head

Hi,

Has anyone flowed a set of stock later Gen I iron heads on a water bench? I am looking for the CFM per 0.100 In lift at the intake and exhaust valve. I have googled around, but most of what I found was people guessing.
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Old Mar 11, 2020 | 03:32 PM
  #2  
Sierra6's Avatar
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Joined: Jan 2013
Posts: 396
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From: AL
Car: 1985 Firebird
Engine: 3.4 turbo
Transmission: Auto
Axle/Gears: 3.42
Re: Flow Characteristics of Stock Gen I Iron Head

I have this copied from a fiero page. not sure which if any were water benches, and if that even matters. the numbers say you lose power by deleting the intake port humps. I deleted mine, and my car made 325 whp and 335 RWTQ at 14 PSI through a 700R4. conservatively speaking, i'm making 163 WHP 167 RW ft lbs N/A, or about 200hp at the crank, from a 3.4 if 14.7 PSI doubles your power.


Last edited by Sierra6; Mar 11, 2020 at 03:37 PM.
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