PCV/Catch Can/Crank Pressure

**shady milkman** · 04-21-2009, 12:59 PM

right now i am debating rather or not i want to go dual catch cans..in case i ever want to road race or autoX..the 2 catch can would never really get used unless i did go road racing or autoX so it seems like a waste...and fyi ...the ls6 step up is great..so you made a good choice anyways

**Dr.Crash** · 04-21-2009, 01:10 PM

Originally Posted by shady milkman

right now i am debating rather or not i want to go dual catch cans..in case i ever want to road race or autoX..the 2 catch can would never really get used unless i did go road racing or autoX so it seems like a waste...and fyi ...the ls6 step up is great..so you made a good choice anyways

how does the 2 cans set-up work?

**shady milkman** · 04-21-2009, 02:15 PM

its pretty much a catch can for each side..dirty and clean side (driver and passenger) ..

**shady milkman** · 04-21-2009, 02:18 PM

**Dr.Crash** · 04-21-2009, 02:19 PM

Originally Posted by shady milkman

its pretty much a catch can for each side..dirty and clean side (driver and passenger) ..

Oh well i did mine just like sarge's write up. a can for the pass side and a little filter with oil spererator on the drivers side. makes perfect sence now. thanks shady

**shady milkman** · 04-21-2009, 02:22 PM

and for a good catch can
here
or
dual cans

and revxtreme's catch cans....and maybe ky's speed's cans..i have not seen inside of those cans so i cant speak on it...but saikoumichi and revextreme cans are proven performers and are actually functioning catch cans...no empty pop bottle shit there

**Dr.Crash** · 04-21-2009, 02:24 PM

Originally Posted by shady milkman

and for a good catch can
here
or
dual cans

and revxtreme's catch cans....and maybe ky's speed's cans..i have not seen inside of those cans so i cant speak on it...but saikoumichi and revextreme cans are proven performers and are actually functioning catch cans...no empty pop bottle shit there

i bought the norris catch can from KY speed. it does have a filter on the inside.

**shady milkman** · 04-21-2009, 02:25 PM

Originally Posted by Dr.Crash

i bought the norris catch can from KY speed. it does have a filter on the inside.

ok then that is also good to go..i just know those cans i listed are top of the line

**Dr.Crash** · 04-21-2009, 02:44 PM

Originally Posted by shady milkman

ok then that is also good to go..i just know those cans i listed are top of the line

cheaper too. wish i would have known about those first

**Hi-Po** · 04-21-2009, 05:23 PM

The Norris catch can will be a LONG wait before they are back on the market. Elite is the only Can avaiable at the moment.

**shady milkman** · 04-22-2009, 06:32 AM

Originally Posted by Hi-Po

The Norris catch can will be a LONG wait before they are back on the market. Elite is the only Can avaiable at the moment.

just get a saikoumichi can and be done with it. follow the layout and you will have a very clean intake...and dont have to worry about that beautiful oil\gassy\toxic smell when you have the heat on or at a stop light.

**Firebirdjones** · 04-22-2009, 11:28 AM

Originally Posted by shady milkman

with ls1 style pcv V

This is how I have mine with one exception. I didn't bother to block the back side of the passenger valve cover.
That hose originally tee's into the hose from the driver side cover. Why not vent from both covers,,,since it's already there.

I just didn't see the need to block the passenger side.

**shady milkman** · 04-22-2009, 11:37 AM

so your still running the Y part of the the pcv system ? if so..then your pushing "dirty" air into the clean side and letting it pass back into your intake without going through the catch can and getting "clean" so you are lessening the effectiveness of the catch can ..if you were to hook the catch can to the clean side..you would notice that almost no oil would be in the catch can..that is why it is called clean side..i would plug the clean side back fitment personally

**fxgs** · 04-22-2009, 12:06 PM

This is my set-up: breather off the rear drivers side, where the PCV originally originated, breather off passenger side valve cover. No oil in throttle body, idle is good. Capped off nipples on passenger side valve cover and throttle body.

**shady milkman** · 04-22-2009, 12:09 PM

hmm whats your a/f ratio ..and also have you had a tune before or after the breather set up ?

**fxgs** · 04-22-2009, 12:14 PM

Tuned after breather set up a/f ratio 13

**shady milkman** · 04-22-2009, 12:19 PM

Originally Posted by fxgs

Tuned after breather set up a/f ratio 13

yea see..breathers arent bad..i just believe that a tune needs to be done after to fully get everything in balance

**Sarge** · 04-22-2009, 01:12 PM

Originally Posted by fxgs

Tuned after breather set up a/f ratio 13

AT idle /WOT what?

**Firebirdjones** · 04-22-2009, 01:23 PM

Originally Posted by shady milkman

so your still running the Y part of the the pcv system ? if so..then your pushing "dirty" air into the clean side and letting it pass back into your intake without going through the catch can and getting "clean" so you are lessening the effectiveness of the catch can ..if you were to hook the catch can to the clean side..you would notice that almost no oil would be in the catch can..that is why it is called clean side..i would plug the clean side back fitment personally

That makes no sense to me at all. They were Tee'd from the factory. Shouldn't make a difference which valve cover you picked to run the hose from, or both for that matter, since they converge and head right for the PCV valve as a single hose anyway.

It is after the PCV when it's already a single hose where you are trying to catch the oil before it enters the throttle body, so the hoses before hand wouldn't have anything to do with clean or dirty.