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

What heads flow better?

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Old Oct 15, 2004 | 11:42 AM
  #1  
MakeitQuick92RS's Avatar
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From: Miami, FL
Car: 1988 Pontiac Trans Am
Engine: 383 Stroker
Transmission: T-5
Axle/Gears: Borg Warner 9-Bolt, with 3.42 Gears
What heads flow better?

I was just here bored at work wondering what heads flow better the 3.4 heads or the 3.1 heads...or is it the same crap? Ebay has some aluminum 3.4 heads...the guy selling it claims they fit 3.4L Birds and Camaros.
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Old Oct 16, 2004 | 01:07 AM
  #2  
vsixtoy's Avatar
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From: Orange, Calif
Car: '87 Cam RS V6
Engine: Top Secret
Transmission: DYT700R4 custom inerts and conv.
3.1 and 3.4 heads are idential. Both are 14054884 castings.

The Aluminum heads are FWD applications. THey will fit our RWD blocks, but not our intakes. The FWD intakes are backwards facing on a RWD car so the TB would face the firewall.
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Old Oct 16, 2004 | 07:44 AM
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oil pan 4's Avatar
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From: High plains of NM
Car: 89 Firebird
Engine: L98
Transmission: T-56
Axle/Gears: 3.73
Yes they will fit. They will bolt on.
If you bolt those heads on a RWD engine it will give you a round a 12:1 c/r.
Those Al heads flow about as good in there stock form as I can get cast iron heads to flow ported.
The Al heads have bigger valves then the iron ones.
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Old Oct 16, 2004 | 08:32 AM
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Gumby's Avatar
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From: NWOhioToledoArea
Car: 86-FireBird
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12:1

and I though regular was expensive enough.
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Old Oct 17, 2004 | 07:40 PM
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MakeitQuick92RS's Avatar
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From: Miami, FL
Car: 1988 Pontiac Trans Am
Engine: 383 Stroker
Transmission: T-5
Axle/Gears: Borg Warner 9-Bolt, with 3.42 Gears
to bad they don't work
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