2.8L Intake Manifold to 3.1L Intake Manifold...
01-17-2005, 02:26 PM
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Car: 1988 Pontiac Trans Am
Engine: 383 Stroker
Transmission: T-5
Axle/Gears: Borg Warner 9-Bolt, with 3.42 Gears
2.8L Intake Manifold to 3.1L Intake Manifold...
Ok so I did a search first and came up with nothing. Now my question is if there is a difference between the intake manifolds for 2.8s and 3.1s. I want to port my intkae manifold but I don't want to lose my daily driver while I work at it. So are they the same?
01-17-2005, 03:31 PM
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01-17-2005, 05:21 PM
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Car: 13 Ram 1500/ 78 Formy
Engine: 5.7 / 7.4
Transmission: 6sp / TH350
Axle/Gears: 3.55 posi / 3.23
where is the vacuum port on the 3.1 that the 2.8 intake doesn't have?
Last edited by Project: 85 2.8 bird; 01-17-2005 at 05:23 PM.
01-17-2005, 09:07 PM
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Car: 91 Camaro
Engine: 3.1...not hardly stock
Transmission: 700r4....not stock either
Axle/Gears: 3.73
the 3.1s have two fittings in the back. the "T" and a single port. the single goes to the MAP sensor.
01-17-2005, 09:52 PM
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IF ya need to seek out a MPFI unit, also try a FWD of same early years. I believe up to 1987 is the cutoff for same stuff under those hoods.
It may be a direct replacement for a 2.8 unit.
It may be a direct replacement for a 2.8 unit.
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