PCV Bypass


donzo

donzo

New Member
Joined
Jun 18, 2008
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Anyone done this? Any benefits?

Was looking at doing this with an oil catch can as a small experiment to see if I notice a change with the fuel effectively being higher octane and the car breathing better.
 
I have this mod, but i have a turbo, i think its best for high compression or turbo cars only, anything else just may be a waste of money. I did it to keep pressure off the back of the pistons and keep oil moisture out of the intake tract.
 
I thought they vented the rocker cover ? ? is there 2 types ?
 
Rich777 said:
I thought they vented the rocker cover ? ? is there 2 types ?
Click to expand...

You can vent from the rocker cover, you can also vent from the block, either way its all connected so your venting the same thing :nice:
 
What actually happens when blocking/bypass the PCV valve?
Any side effects?

Planing to get a Catch tank connected to rockercover and the back of the engine
 
i have ran a vented catch bottle for a while now with lines running from the top of the breather box on the block / the nipple at the back of the rocker cover

no downsides whatsoever. keeps any oil vapour out of the intake and helps keep the engine breathing a bit better
 
Which nipple on the black box should I connect to the catch tank?
 
you remove the hose that goes from the black box to the PCV valve and place a hose from there to the catch tank

doing this you have to block off the vacuum line on the inlet manifold, to properlyt do this you need a 10mm vacuum cap
 
stevenEK9 said:
you remove the hose that goes from the black box to the PCV valve and place a hose from there to the catch tank

doing this you have to block off the vacuum line on the inlet manifold, to properlyt do this you need a 10mm vacuum cap
Click to expand...

I've seen a picture of your setup. But do I just block the nipple (vacuum line) on the picture (red arrow)? And then leave the PCV valve in place? Can't see on your pic

Sorry for being an ass

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you remove the PCV valve completely and both the line that runs from it to the black box and the one from the inlet manifold

then yes you plug both the inlet manifold and intake pipe

to complete this "upgrade" i would suggest removing the IM and TB to clean them out of any oily residue that's aolready there which may impede the airflow
 
Thanks Steven. That really helped me to understand :D
Planing to fit a Hondata gasket and clean TB and IM - 2 birds with 1 rock :p
 
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