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

TPI vs MPFI

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Old 03-19-2005, 11:43 PM
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Car: 91 Firebird
Engine: 3.1 V6
Transmission: TH-700-R4
TPI vs MPFI

What are the differences?
Old 03-19-2005, 11:52 PM
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Car: 1991 CAMARO 1968 FIREBIRD
Engine: CAMARO 3.1L FIREBIRD 455
Transmission: CAMARO 700R4 FIREBIRD TH-400
Both are the exact same thing.
Old 03-20-2005, 05:15 AM
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Car: 95 Z28
Engine: LT1
Transmission: Built 4L60E with 3000 Stall
Axle/Gears: 3.23? I'm not sure
Does MPFI have the runners the same way though? TPI is usually V8s and MPFI is us

:edit: for kicks n giggles


My MPFI


My friends IROC with TPI. Not the best pic but ya lol

Last edited by theratdude64; 03-20-2005 at 05:20 AM.
Old 03-20-2005, 07:41 AM
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Car: 2012 Ram express
Engine: 5.7 hemi
Transmission: auto
Axle/Gears: 3.55
tpi/mpfi

same type of fuel injection, both have a fuel injector for each cylinder. Tpi is just the name they give the v8's fuel injection.
Old 04-02-2005, 12:08 PM
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Car: 1986 Camaro
Engine: 2.8
Transmission: 700r4
but would it be possible to use the tpi plenum on our cars?
Old 04-02-2005, 01:12 PM
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Car: 95 Z28
Engine: LT1
Transmission: Built 4L60E with 3000 Stall
Axle/Gears: 3.23? I'm not sure
nope
Old 04-02-2005, 02:01 PM
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Car: 13 Ram 1500/ 78 Formy
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Axle/Gears: 3.55 posi / 3.23
Originally posted by theratdude64
nope
Actualy, ,Jerriko did it. used the center section of tpi amifold & welded the 2.8/3.1 runners to it.
Old 04-03-2005, 04:11 AM
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Car: 95 Z28
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Axle/Gears: 3.23? I'm not sure
pics? Did that help out at all?
Old 04-03-2005, 02:33 PM
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The runners are supposedly tuned lengths for torque with a TPI setup.
Old 04-04-2005, 12:20 PM
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Car: 1992 Camaro RS
Engine: 5.0L TBI
Transmission: 700R4
Axle/Gears: 2.73
If I remember correctly, TPI runners are all the same length.
The runners on our V6 engines are longer on one bank of cylinders than the other - if I am remembering correctly of course.

Everything else is common between TPI and MPFI. Both are batch-fire GM port injection systems.
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