PCV, valve cover spigot and turbo input hose connections
I need comment on the way I have set up the interface between the intake manifold, the valve cover and turbo input tube. I installed a Tee on the intake, one line of which has the PCV valve installed so that boost pressure is prevented from entering the valve cover through the spigot. I have that coupled to a 5/8th plastic tee which installs on the valve cover. The remaining port on the tee has the steel factory tube attached to the ribbed hose that is part of the turbo intake side. My theory is that crankcase pressure is drawn into the intake simultaneously through the PCV and the turbo intake hose during part throttle operation. During boost the PCV is forced closed stopping boost from entering the crankcase and the line to the turbo intake tube draws off positive pressure from the crankcase.
I set this up to be similar to the 1985 L-body arrangement where the steel tube is attached to the air cleaner body.
Does this make sense to you all? Am I missing anything. I do realize that fine oil mist may be entering the compressor and the intercooler. Does it matter?
Thanks, jeff1234
Re: PCV, valve cover spigot and turbo input hose connections
I'm dead against any oily vapor or mist entering the Engine air intake as it can effectively dilute the fuel octane rating.
There is no up side to running a PCV on our Engines, unless you want oil in the intercooler etc..
The lucky thing is, even in winter, our Turbo Engines don't sludge up, as one of the main advantages of a PCV is sludge elimination.
I run a hose directly from the valve cover to the atmosphere, the less the restriction, the less oil that escapes with the venting.
TBI valve cover with 2 nipples and 2 hoses is even better.
Many disagree!!
Thanks
Randy
Re: PCV, valve cover spigot and turbo input hose connections
Randy, thanks for your input. It is appreciated.