Catch can and engine sound??

[fdjizm]

http://www.svtperformance.com/forum...an-over-a-separator-The-differences-explained

Found this article and was wondering am I gonna need a retune with this Peterson setup???

The article says that a "BREATHER" doesn't require a retune. Is this Peterson setup considered a breather and/or catch can??

It's a catch can, it doesn't "breathe" there is no exit.
You see vapor because it's getting squeezed out of the can because of the pressure.

 

[Scott_0]

from what I can tell, it doesn't feed back into the intake tract, therefore, it'd have to be venting to atmosphere no?

sent from my HTC M8 using tapatalk

 

[UltraKla$$ic]

So would this setup make my car run lean?? Retune?

Serious question.

 

[skwerl]

So would this setup make my car run lean?? Retune?

Serious question.

No. The PCV system draws crankcase air into the intake after the MAF so it is unmetered air. On the other hand, one side has positive pressure and the other side has negative pressure so there is very little total air added to the intake. By going to a vented setup you should have very slightly less unmetered air in the intake meaning your car MAY be ever so slightly richer at times. On the other hand it is all well within the MAF adjustment range so you won't see any measurable difference.

Keep in mind I'm talking out of my ass since I know almost nothing about tuning and I'm just regurgitating what my tuner told me.

 

[black2008gt]

have to start the car first before it could run lean....baby steps..baby steps.

 

[LAStang1234]

have to start the car first before it could run lean....baby steps..baby steps.

Haha it never ends.

 

[UltraKla$$ic]

No. The PCV system draws crankcase air into the intake after the MAF so it is unmetered air. On the other hand, one side has positive pressure and the other side has negative pressure so there is very little total air added to the intake. By going to a vented setup you should have very slightly less unmetered air in the intake meaning your car MAY be ever so slightly richer at times. On the other hand it is all well within the MAF adjustment range so you won't see any measurable difference.

Keep in mind I'm talking out of my ass since I know almost nothing about tuning and I'm just regurgitating what my tuner told me.

Thanks Brian. Sounds legit.
Anybody else confirm whether a tune is required or not??

 

[Grabber Blue 5.0]

For point of reference Darrin when I installed my breathers I never retuned my car.

 

[BadHabit2Break]

Thanks Brian. Sounds legit.
Anybody else confirm whether a tune is required or not??

When I logged my 93 tune, Shaun @ AED saw my passenger side was running lean. He thought maybe I had swapped TB to an aftermarket. The only thing changed was adding the catch can. I had to datalog idle and driveability with the can removed. Shaun came back and said that was it.

Darren, I would contact Shaun and let him know that you added the catch can and also log your idle and a 1k-5k normal pull. So if he needs to adjust the tune he can.

And I didn't pay $300 for mine either....LOL

 

[nasty281]

in all seriousness where can i find the peterson can. i cant find it anywhere especially as a kit. not sure what hose or fittings etc are needed. about to have my cobra jet intake on it and dont want it getting gummed up

 

[UltraKla$$ic]

in all seriousness where can i find the peterson can. i cant find it anywhere especially as a kit. not sure what hose or fittings etc are needed. about to have my cobra jet intake on it and dont want it getting gummed up

http://shop.watsonracing.com/mobile/Product.aspx?id=38753

 

[07 Boss]

Wow, a whole lot of misinformation a here.

Stock PCV system has one intake, passenger side, and one exit, drivers side with the actual PCV valve. Normally manifold vacuum draws the gases out of your crank case via the drivers side. Air flows into the crankcase from the passenger side connected to the intake tube AFTER the MAF so it is METERED air.

Now if you install just a catch can you need it on the drivers side. This set up requires that the system stays attached to the intake tube and manifold.

If you vent to the atmosphere via breathers or a breather/catch can, the flow on the system is reversed. Since you no longer have manifold vacuum pulling it out of the engine it just flows out under pressure from the passenger side. Without the manifold vacuum the PCV valve on the drivers side will not open. So with a system vented to the atmosphere the drivers side does nothing. You don't need to put a catch can on the drivers side if your running any kind of breather.

So, if your running a catch can breather you only need to run the passenger side through the can. You can just cap off everything else.

If you are running a catch can (no breather) it needs to be on the drivers side.

Unless you remove the PCV valve from from the drivers side cam cover, there is no need to run both lines through a catch can.

 

[Bullitt 3309]

Wow, a whole lot of misinformation a here.

Stock PCV system has one intake, passenger side, and one exit, drivers side with the actual PCV valve. Normally manifold vacuum draws the gases out of your crank case via the drivers side. Air flows into the crankcase from the passenger side connected to the intake tube AFTER the MAF so it is METERED air.

Now if you install just a catch can you need it on the drivers side. This set up requires that the system stays attached to the intake tube and manifold.

If you vent to the atmosphere via breathers or a breather/catch can, the flow on the system is reversed. Since you no longer have manifold vacuum pulling it out of the engine it just flows out under pressure from the passenger side. Without the manifold vacuum the PCV valve on the drivers side will not open. So with a system vented to the atmosphere the drivers side does nothing. You don't need to put a catch can on the drivers side if your running any kind of breather.

So, if your running a catch can breather you only need to run the passenger side through the can. You can just cap off everything else.

If you are running a catch can (no breather) it needs to be on the drivers side.

Unless you remove the PCV valve from from the drivers side cam cover, there is no need to run both lines through a catch can.

So if I am running a Catch Can/Breather type setup, I can cap the Driver side PVC??? Or replace it with a passenger side connector?

 

[UltraKla$$ic]

The PETERSON setup eliminates the PCV so it connects to both driver and passenger and vents to atmosphere.

 

[07 Boss]

The PETERSON setup eliminates the PCV so it connects to both driver and passenger and vents to atmosphere.

How does it do that? Do you tap the cover in another spot? Or do you remove the valve from the cover?

 

[UltraKla$$ic]

How does it do that? Do you tap the cover in another spot? Or do you remove the valve from the cover?

The Peterson can is not sealed. It allows vapors to escape out of the top.

The PCV valve is taken out and a non-PCV valve is put in its place like on the drivers side.

Thanks Ed for replying in this thread to btw!

 

[07 Boss]

The Peterson can is not sealed. It allows vapors to escape out of the top.

The PCV valve is taken out and a non-PCV valve is put in its place like on the drivers side.

Thanks Ed for replying in this thread to btw!

How did you know my name? Anyways I was just thinking about the PCV valve. On a coyote, is it built into the cover like a 3v? I just got a new set of cam covers and was going to take a dremel to it and just cut it out. But if there is a better way to do it, I'd like to hear about it.

 

[UltraKla$$ic]

The PCV valve on the Coyote just twists out. Easy peasy. New one just twists in.

 

[07 Boss]

The PCV valve on the Coyote just twists out. Easy peasy. New one just twists in.

Oh ok. I will have to retract my earlier post about the drivers side being a dead wienie with a breather set up.

And you still didn't tell me how you knew my name. Kinda spooky. I lost all anonimity now. Lol.

 

[Bingo]

And you still didn't tell me how you knew my name. Kinda spooky. I lost all anonimity now. Lol.

It's in your profile.