Hey guys, i was wondering who sells a screw in valve cover breather for LT4 valve covers. I saw it on someones website, cant remember where though. If someone can tells me who makes it or where they bought it, that would be super.



Nick

 

Thunder Racing and LS1 Speed have them.

 

I wouldn't use a breather, because then you're messing with your PCV system that uses MAF metered air. With a breather you are introducing un-metered air. Just my .02

 

True, but injuneer pointed out that this can be corrected by the long term fuel trims with no problem.

 

But "Injuneer" still has a closed PCV system, and no breather. Think about it

 

Hey, Im just spreading the wealth of knowledge and yes my PCV system is still stock too.

 

Hey i have a question im running a breather on my car is that ok? I do have a blower and my current PCV valve tube and the tube that did go to the TB is now going to the suction side of the blower is that hurting anything....

 

Blowers are a different story. You have to do exactly what you did to prevent overpressuring the crankcase with the blower.

 

I ordered the breather yesterday from LS1 Speed. I spoke to someone there with a 9 sec LT1 car, and they said to give it a try, thats what they use on cars there. I think after the cam and head swap, the car is sucking some oil through the PCV tube connnected to the throttle body. When I pull the throttle body off, you can see a light coat of oil in the intake. I should have them Tuesday of this week, and I will post results.



Nick