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Getting alot of pressure in radiator when boosted.Help?

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Old 03-09-2008, 12:10 AM
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Default Getting alot of pressure in radiator when boosted.Help?

I took my car to the track and evertime we run we noticed antifreeze up under the hood and it seems to be getting worse. When you rev up the engine a little it is fine until you rev it up enough to push boost and then it shoots antifreeze out of the catch can overflow and the radiator cap. If you remember a while back I had a post on my car losing boost 20psi on the dyno one time and 15psi the next. Could it be a blown gasket causing the boost to blow pressure back into the water.
Old 03-09-2008, 04:40 AM
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yep, thats what my stock motor did
Old 03-09-2008, 05:32 AM
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Very much so.
Old 03-09-2008, 10:16 AM
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I guess this explains my loss of boost. What is the best head gaskets to go back with?
Old 03-09-2008, 02:06 PM
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Do you have head studs?
Old 03-09-2008, 03:18 PM
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Do you have head studs?

Yes, It has ARP head studs.
Old 03-09-2008, 03:32 PM
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stock mls or cometics,what kind of heads do you have? you might need something with a thicker deck at that boost level(etp or AFR)
Old 03-09-2008, 04:05 PM
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O-ring the heads and run copper gaskets.
Old 03-09-2008, 04:17 PM
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I bought the car already built and the heads have Avenger CNC ported on the front side of them. I really dont know alot about them. Hopefully I will find out everything now that I have to take it down.




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