Darrell...breather or no breather? settle this for us once and for all=) - Page 2 - SRT Forums

The Consolidator · 02-18-2007, 05:39 PM

Honestly, it doesn't really matter. More of a preferance.

When i was still modding V8s and installing supercharer kits on mustangs and camaros most of the supercharger companies told us in the directions to vent the breathers to the atmosphere and to simply run down the side of the engine bay.

As long as you don't have rings that are very worn, you won't be dumping much oil at all.

snkmug · 02-19-2007, 06:58 PM

Quote: Originally Posted by XXxx_Totmacher_xxXX

I've seen a few cars with a breather that had major ring blow by on the Dyno and yeah it's not pretty. lol It's like the Mobil 1 version of old faithfull.

like mine

XXxx_Totmacher_xxXX · 02-19-2007, 10:41 PM

I honestly meant valve seal, not ring, but yeah Shawn your car came to mind and most recently Chris' car.

Honestly I think this is a dumb topic and don't know why it keeps surfacing. just keep the pcv valve routed to the TB to maintain a vac source on the case, and put a breather on the driver side. Only thing above and beyond that is to put a check valve in between the TB and PCV valve. I don't get what is so hard to understand and accept about that.

Cruiserdude · 02-23-2007, 02:13 PM

Still waiting to hear what Darrell has to say, but I've been running a hose to a catch can running to a filter ziptied to the driver's side upper rad. mount. Works fine, no problems here.

Ant @ Psi-Fi · 02-23-2007, 02:21 PM

Put a catch can between the valvecover and intake. The vacuum make for good ring seal.

Chess can bite my Psi-Fi Junk

Christian's car will blow the doors off anything you have.

darrell cox · 02-23-2007, 05:17 PM

Its best to run the PCV thru a check valve to insure it from leaking while under boost. Next the engine really benefits from the added vacuum under boost if the drivers side of the valve cover is connected back to the air intake. There is alot of vacuum there while under boost. To insure no oil gets consumed from the air intake you install a recovery tank between the two. This way when the car is at idle and under no boost the PCV, hence the name (Positive Crankcase Ventilation) keeps vacuum applied to the engine. When the engine is under boost the air intake pulls a vacuum on the crankcase. Bottom line vacuum all of the time. The rings conform to the cylinders better with vacuum. Also ring flutter is minimal with vacuum keeping oil from being pushed by the rings and up onto the top of the pistons and combustion chambers. Out of all of the engines we have disassembled over the years you see it every time (the ones that are not connected to the air intake) also remember that engine oil added into the combustion process greatly reduces the fuels octane. This can causes unwanted detonation and spark knock. The crank seals, valve seals, and cam seals are designed around this vacuum. Also this greatly reduces windage in the crank case further adding proper oil control and some added performance.

Thanks

Breakin Newz · 02-23-2007, 05:38 PM

Quote: Originally Posted by darrell cox

Its best to run the PCV thru a check valve to insure it from leaking while under boost. Next the engine really benefits from the added vacuum under boost if the drivers side of the valve cover is connected back to the air intake. There is alot of vacuum there while under boost. To insure no oil gets consumed from the air intake you install a recovery tank between the two. This way when the car is at idle and under no boost the PCV, hence the name (Positive Crankcase Ventilation) keeps vacuum applied to the engine. When the engine is under boost the air intake pulls a vacuum on the crankcase. Bottom line vacuum all of the time. The rings conform to the cylinders better with vacuum. Also ring flutter is minimal with vacuum keeping oil from being pushed by the rings and up onto the top of the pistons and combustion chambers. Out of all of the engines we have disassembled over the years you see it every time (the ones that are not connected to the air intake) also remember that engine oil added into the combustion process greatly reduces the fuels octane. This can causes unwanted detonation and spark knock. The crank seals, valve seals, and cam seals are designed around this vacuum. Also this greatly reduces windage in the crank case further adding proper oil control and some added performance.

Thanks

Nice.. So there you go guys... You've gotten the answer from the man!

Big D's Blue 04 · 03-02-2007, 09:31 PM

so glad I went with my gut on leaving that hooked up to the stock config. just added the check valve and catch tank.

GR8FLPT · 03-04-2007, 06:01 PM

S**T Now I need to make a list of all the littlethings I need to do to the car to get it just right... I guess add this to it.

mario03srt · 03-05-2007, 05:42 AM

All,

I re-did mine per Darrell's instruction, I'll have a pic later.

Marion

mario03srt · 03-06-2007, 06:03 PM

I added a barb to my intake and put in a catch can between the breather. So now I have constant vacuum to the valve cover. And no oil to the turbo. I kept my checkvalve/catch can setup on the pcv side as before.

So.....................comments?

Marion

reed32 · 03-06-2007, 06:07 PM

looks good

darrell cox · 03-06-2007, 09:08 PM

Quote: Originally Posted by mario03srt

I added a barb to my intake and put in a catch can between the breather. So now I have constant vacuum to the valve cover. And no oil to the turbo. I kept my checkvalve/catch can setup on the pcv side as before.

So.....................comments?

Marion

Ghowie · 03-07-2007, 05:18 AM

Now lets say your intake has zero nipples to connect anything,what do you do then? Would running a t to the pcv line after the check valve work better than just having a filter on the valve cover?

mario03srt · 03-07-2007, 05:30 AM

Quote: Originally Posted by Ghowie

Now lets say your intake has zero nipples to connect anything,what do you do then? Would running a t to the pcv line after the check valve work better than just having a filter on the valve cover?

Ghowie,

My homebrew intake did not have a nipple on it. I just drilled a hole and threaded in the barb/nipple with a tad of silicone sealant on the barb where it meets the intake. The barbs can be found at any Home Depot etc. actually in the same area where you pick up the catch can in the air compressor accessories section.

Marion