faithofadragon

alright im researching some stuff for my supercharger when i came across a problem
were am i gonna put the pcv valve hose and the crankcase vent hose
if i leave them where they are wouldnt boost leak into crankcase?

so i came up with a idea the only problem i see is with the pcv valve doesnt it need vaccumm to open up?




what did you turbo guys do?

Agarwal

You simply need a boost PCV valve. It won't allow boost to pass. Was cheap, something like $10 IIRC.

faithofadragon

but for the crankcase vent i would have to put the hose before the supercharger and after the maf right?
and where would i get said pcv valve

albert

The PCV valve is one direction. Hence the name POSITIVE Crankcase vent or valve.

it only allows air OUT, not IN.

The hose from the top that goes to the intake elbow you simply hook up to a small breather filter. The Crankcase needs to breathe in sometimes, and that's the purpose of that hose (and why you put a filter on it).

In extreme situations, depending on where you hook the PCV hose to, the suction/vacuum of the supercharger my suck oily mist out of the top of the valvetrain into your supercharger. The oily mist is good for the supercharger (lubricant and it helps seal the supercharger vanes leading to better efficency), however it may suck TOO MUCH out and the oil mist will lower the octane rating of your fuel, lead to smoky running and excessive oil consumption. If it does (not saying it will, simply IF it does), then block off the PCV and rely on the simple open hose to it's left to deal with positive and negative crankcase air pressures.

faithofadragon

random i dont think ive mentioned that my supercharger will be a roots style but setup like a centrifigal
in front of the motor

so wouldnt under boost the IM be pressureized and allow boost to enter the pcv? ive heard of it before

cbehage

The pcv valve lets air OUT of the crankcase only. It does NOT let air IN the crank case.

IF the boost goes into the pcv, it will close it and not let air into the carnk case.

faithofadragon

alright i knew that

but i wanted to make sure that boosted air wont pressureize the crankcase

Jay-M

you're the crankcase is safe from boost as long as you have the pcv valve. just leave it connected to the intake manifold, unless your going to have catch can.

for that hose coming out of the elbow into the crankcase, don't connect it to the crankcase anymore.... plug it... and as random stated, put a breather in, where that same hose used to be connected in the crankcase

Denisst99

be aware that some PCV valve allow boost ot enter the crankcase. .some stock hyundai do that better be safe then sorry... and below 10$ who can argue? smile.gif

Jaws021

just get a catch can and be done with it mein..