shouldn't cause a vacuum leak if you no longer run vacuum to the valve covers.

 

I'm running 3/4" internal size hoses from both valve covers to a catch can w/KN filter. I know when I added it, Rick from Synergy said he will have to tune for the "leak" it causes.

I haven't had any problem with blowby since I added the can. Only issue I have is you can occasionally smell the oil in the cab after getting on it hard or when you initially shut the eingine off. I am going to pull the KN filter and run a hose to the base of one of the turbo's air filter. That way the turbo will suck up the oil fumes and they won't linger into the cab.

I used a can off eBay that ran about $70. Nicely built. All the hoses, clamps and fittings are from the Hardware store. I'll pm a link to you.

Rick

 

if you don't run vacuum to the valve covers, then what is the purpose of the catch can????

My point is your introducing un-metered air into the intake, which is what a vacuum leak does...

 

any idea where that is on a radix?

 

I put a simple catch on mine last fall. One of the air line filter looking things. Works fine. The big surprise after doing it was the KR I randomly got while cruising around went away. Guessing that it would suck the occasional oil drop and detonate.

 

It is just vented to atmosphere, can still catches any crud that makes it's way out instead of puking it on the engine or ground. so with no vacuum going to the valve covers there shouldn't be any unmetered air coming into the intake.

 

how is air from my valve covers putting more air to the intake??? My intake is plugged off where the PCV once was.

 

when you say fixed orifice you mean it flows both ways right?

us turbo guys running vacuum to the valve covers need a check valve in the way, if not the boost will blow back in. the older trucks it was OK it had a check valve stock. but the newer truck like my 04 Tahoe you can blow right back into the valve cover. i tried it to see it flows both ways with ease.

 

What pulls vacuum to your catch can if your intake is capped off?



My orginal statement above was meant if you run a Normal catch can setup which your PCV hose goes into your catch can then your catch can into your intake.

 

Are you running your pcv hose to your intake? If you keep the passenger side of the valve cover vented to atmosphere and have a normal PCV setup, they you are introducing unmetered air...