valve cover breathers?

mustanginky · September 3rd, 2011, 02:33 PM

what does it take to run valve cover breathers? i have thought about this but not done it yet. i hate having hoses run all over the engine compartment. what issues will i have with it, if any? supercharged motor if that matters. will i need a tune for this sort of thing?

mrsinister2424 · September 3rd, 2011, 05:15 PM

I've got one on the intake side(driver) Put one one because I didn't want any extra tubing considering I had enough

stal94gt · September 3rd, 2011, 07:46 PM

Only issue I ever had with running breathers on a boosted motor is it sprays oil mist out. If you only run one filter the other valve cover has to run before the maf or else you will have issues with un-metered air

WickedSnake00 · September 3rd, 2011, 08:40 PM

Originally Posted by stal94gt

Only issue I ever had with running breathers on a boosted motor is it sprays oil mist out. If you only run one filter the other valve cover has to run before the maf or else you will have issues with un-metered air

Smart man.

There's also the issue of allowing more moisture in, but thats primarily if you do lots of short trips. If you do longer drives then it has an opportunity to burn off any moisture.

Also crankcase vapors technically count against emissions. I highly doubt they do sniffer tests for this, but it's technically part of EPA/CARB regulations.

Bullitt5566 · September 3rd, 2011, 08:47 PM

Holy hose, Sinister, what is all that? Inky, I think Stal hit it. The PVC system draws air from one side through the PVC and into the intake. So if you run a breather instead of a hose it will allow un-metered air. I briefly ran a breather without any problem, but it really should run back to the intake before the S/C and after the MAF. I've always wondered pressure is lost through the PVC or elsewhere.

mustanginky · September 3rd, 2011, 11:13 PM

i guess i'll just not do it, from research other wise i see it's problematic with oil mist getting everywhere. thanks for the advice/pics.

stal94gt · September 3rd, 2011, 11:48 PM

The way I ran my setup with blow threw maf was the pcv was run into the intake of the sc and a breather on the passenger

September 3rd, 2011, 02:33 PM	#1
mustanginky MM Fanatic 2000 gt Join Date: Feb 2009 Location: La grange, KY Posts: 4,259 iTrader: 2 reviews	valve cover breathers? what does it take to run valve cover breathers? i have thought about this but not done it yet. i hate having hoses run all over the engine compartment. what issues will i have with it, if any? supercharged motor if that matters. will i need a tune for this sort of thing? __________________ Procharged 2000 5 Speed BAB GT, built motor, blower cams, speedy dyno tune 412 hp, 450 rw tq HARDCORE CREW BRIGHT ATLANTIC BLUE CREW #1 MEMBER

September 3rd, 2011, 05:15 PM	#2
mrsinister2424 Hardcore Enthusiast 99' Mustang GT 3214@OVER 9000!!! Join Date: Dec 2008 Location: Redlands, CA Posts: 2,629 iTrader: 0 reviews	I've got one on the intake side(driver) Put one one because I didn't want any extra tubing considering I had enough __________________ 99' Rio Red Mustang GT: --My Garage-- Check garage. Vortech V-1 intercooled running 9lbs of boost Life= eat, lift, eat, eat, eat, sleep, repeat

September 3rd, 2011, 07:46 PM	#3
stal94gt I Post Entirely Way Too Much 2003 mustang v6 ;) slow Join Date: May 2010 Location: eglin afb florida Posts: 10,197 iTrader: 2 reviews	Only issue I ever had with running breathers on a boosted motor is it sprays oil mist out. If you only run one filter the other valve cover has to run before the maf or else you will have issues with un-metered air __________________ bone stock from the factory!

September 3rd, 2011, 08:47 PM	#5
Bullitt5566 Regular 2001 Mustang Bullitt 5566 Join Date: May 2009 Location: South Carolina Posts: 347 iTrader: 1 reviews	Holy hose, Sinister, what is all that? Inky, I think Stal hit it. The PVC system draws air from one side through the PVC and into the intake. So if you run a breather instead of a hose it will allow un-metered air. I briefly ran a breather without any problem, but it really should run back to the intake before the S/C and after the MAF. I've always wondered pressure is lost through the PVC or elsewhere. __________________ True Blue Bullitt 517hp 456tq Vortech \| Aftercooler \| MHS Blower Cams \| MAC LT \| Lethal Xpipe \| SLP PowerFlo \| MM RCA TQA PHB FLSC

September 3rd, 2011, 11:13 PM	#6
mustanginky MM Fanatic 2000 gt Join Date: Feb 2009 Location: La grange, KY Posts: 4,259 iTrader: 2 reviews	i guess i'll just not do it, from research other wise i see it's problematic with oil mist getting everywhere. thanks for the advice/pics. __________________ Procharged 2000 5 Speed BAB GT, built motor, blower cams, speedy dyno tune 412 hp, 450 rw tq HARDCORE CREW BRIGHT ATLANTIC BLUE CREW #1 MEMBER

September 3rd, 2011, 11:48 PM	#7
stal94gt I Post Entirely Way Too Much 2003 mustang v6 ;) slow Join Date: May 2010 Location: eglin afb florida Posts: 10,197 iTrader: 2 reviews	The way I ran my setup with blow threw maf was the pcv was run into the intake of the sc and a breather on the passenger __________________ bone stock from the factory!

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