Hey all, I have a stock 93 notch. I found an old valve cover k&n breather from way back. I installed the filter and blocked the egr plate and oil filler neck bung. Is this correct? Thanx
what are the consequences of running a breather with a functioning pcv system? is it better to run with the pcv, or a breather setup on a bolt-on 5.0? what do you do with the pcv valve, anything?
If you install an open breather on an otherwise stock engine, it's just a huge vacuum leak. Nothing to be gained. Any of the stock systems that use a vacuum signal will be messed up.
leaving the oil cap off will allow fresh air (ie. O2) into the crankcase which will be pickup by the PCV system and introduced into the intake without be metered by the MAF.
that's one reason we have a closed PCV system.
if he completely deletes the PCV system then that problem goes away.
now, why do you want to delete the PCV system?? it doesn't rob any HP
I would get rid of the breather and stick with the PCV. The breather is just a vent, the PCV system has a small about of vacuum that evacuates the pressure in the crake case.