Originally Posted by NOlowrider
Blazin72-Standard PCV? I have read that the crank case can still get pressurized, I don't see how as the carb will always see vacuum. Some talk about running a supra PCV or a Mazda turbo PCV.
I have ran two breathers with no issues, but noticed that my oil gets black real quick.
Not trying to hi-jack this thread I just have the same dilema.
On a roots blower, the carb on top will always see vacuum around -12. It never goes to zero. On the manifold (under the blower), it will go to 0 and then into boost. Watch where you hook your various vacuum hoses! Power brakes never worked so well off the carburetor, but if you run the vacuum line to your th350 from the carb, you will be in for an unpleasant experience.