exhaust port on intake gasket,open or closed????
#2
Supreme Member
Joined: Mar 2008
Posts: 1,549
Likes: 1
From: CT
Car: 86 T/A, 83 Z/28
Engine: 5.0 TPI, 350 2 X 4 bbl
Transmission: 4 speed auto, 5 speed manual
Axle/Gears: 3.23 posi, 3.73 std
Re: exhaust port on intake gasket,open or closed????
Well although the rhyme and reason to the exhaust cross over port eludes me it does apparently make a difference. Not only do some require a restrictor installed but it also makes a difference which side you install it on. So long story short the intake manifold gasket should have come with instructions that will say what applications had restrictors and on what side.
#3
Supreme Member
iTrader: (3)
Joined: Nov 2001
Posts: 2,428
Likes: 2
From: Fairview Heights Illinois
Car: 1986 Irocz
Engine: 305 TPI
Transmission: 700R4
Axle/Gears: 3.25:1
Re: exhaust port on intake gasket,open or closed????
It's a very simple deal. The EGR comes from the crossover ports on the heads. It feeds exhaust gasses into your intake manifold which also heats the manifold. If you don't want EGR or extra heat in your manifold, then block those crossover ports. The difference between open and restricted is irrelevant. It either flows exhaust into the intake manifold or it doesn't.
#4
Supreme Member
Joined: Mar 2008
Posts: 1,549
Likes: 1
From: CT
Car: 86 T/A, 83 Z/28
Engine: 5.0 TPI, 350 2 X 4 bbl
Transmission: 4 speed auto, 5 speed manual
Axle/Gears: 3.23 posi, 3.73 std
Re: exhaust port on intake gasket,open or closed????
It's a very simple deal. The EGR comes from the crossover ports on the heads. It feeds exhaust gasses into your intake manifold which also heats the manifold. If you don't want EGR or extra heat in your manifold, then block those crossover ports. The difference between open and restricted is irrelevant. It either flows exhaust into the intake manifold or it doesn't.
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