ECS Restrictor Plate removed
Melting Slicks
Joined: Apr 2007
Posts: 2,987
Likes: 16
From: Phoenix
You will get between 12-16psi depending on cam and exhaust setup. The more free flowing your setup is, the less the boost number will be. Probably somewhere in the mid 700's for RWHP if you have a cam.
Speedy
Joined: Mar 2007
Posts: 6,112
Likes: 931
From: Tn
2024 C8 of the Year Finalist - Modified
My air filter and thus restrictor plate fell off and I drove around for a while before noticing. The motor stayed in on piece.
You pick up 4psi or so without it. If you have adequate pumps and a boost referenced system it should be ok.
You pick up 4psi or so without it. If you have adequate pumps and a boost referenced system it should be ok.
Speedy
Joined: Mar 2007
Posts: 6,112
Likes: 931
From: Tn
2024 C8 of the Year Finalist - Modified
Speedy
Joined: Mar 2007
Posts: 6,112
Likes: 931
From: Tn
2024 C8 of the Year Finalist - Modified
Its not only the amount of fuel. After 11psi you need more octane or a colder intake charge to prevent knock.
Race gas is the simplest solution but depending on availability it is inconvenient.
Use meth injection adds a little octane amd also cools the intake charge. People have gone a long way on pump and meth with forged motors.
7 to 800 tends to be the limit of the stock motor with many people living at 5to 700 without issue
Race gas is the simplest solution but depending on availability it is inconvenient.
Use meth injection adds a little octane amd also cools the intake charge. People have gone a long way on pump and meth with forged motors.
7 to 800 tends to be the limit of the stock motor with many people living at 5to 700 without issue
Le Mans Master
Joined: Nov 2007
Posts: 6,422
Likes: 200
From: Wilkes-Barre Pa
You will need meth and to have it tuned for the higher boost. ECS kit with meth, headers, and fuel upgrade I'm seeing around 14 PSI and 735hp with the plate out. Still stock internals.
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Racer
Joined: Jul 2012
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If I was to make any changes to my internals, would changing the pistons be the only thing I should consider? I've heard people say that getting new head studs and a LS9 gasket are also a cheap insurance.
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