Quote:
Originally Posted by gmsii
The solid answer is that the factory check valve does leak .....but it doesn't leak enough to affect performance
At KW we tested the check valve and it leaks ever so slightly at approx 7psi but the amount of air that leaks through is roughly the same at 7psi all the way up to 90psi.
We tested the KW kit with both the factory check valve and a heavy duty check valve and there was no difference in performance/horsepower
The are those that freak out over the idea of having a 'boost leak' but the reality is that the leak has no perceivable affect on boost ....just as a pinhole leak in a bathtub wouldn't have a meaningful affect on the overall volume of water in the tub.
So the definitive answer is .....change it if you want, but you don't really need to
ps.....for those that are freaked out about leaks... Did u realize that your wheels and tires leak air also?
|
What factory check valve are you talking about? Can you please take a picture of it? Can you describe this testing procedure you performed? There is no check valve in the PCV system on this car. That hose running off the back of the intake manifold and into the crankcase on the passenger side is being pressureized and is pressurizing the crankcase without a check valve installed. We aren't worried about leaking or losing boost, we are worried about presurizing an area of the engine that wasn't meant to see pressure.