Crankcase Breather, Good or bad? Options

[yfn16]

I've seen and heard contradicting opinions on this topic, so I am just wondering... Will installing a crankcase breather on our motors cause any issues? Does it need the slight vacuum?

[Smaay]

it already has one

[Rawrssell]

I recently installed an Injen short ram and on the C.A.R.B approved set up, the breather hose is removed from the TB and plugged into the short ram. The only problem is that now it seems there has been a larger amount of blow by recirculating (I know this is by design for California's EGR) so I bought a Spectre breather filter, took off the hose connecting the TB to the crankcase, placed the filter, and connected the hose from the TB to my short ram. Doing this reduces the annoying blow by gunking up the TB and feeding cleaner air. Now if you are like me and live in California, this is an illegal mod since the vacuum routing has been tampered with, but if you are on good terms with law enforcement then you will not have to reroute the correct vacuum lines until smog.

As for any power increase; marginal. The fact that the blow by and crankcase pressure are no longer recirculating helps free up some withdrawn power. *Anyone please correct me if I am wrong*

I hope this answers your question! :]

[yfn16]

I'm not looking for any power increase. I'm looking for cleaner air. Both times I've tore down my motor the intake has been filthy and gunked up. I just want to stick a breather filter on instead of routing a vacuum line directly to where "clean air" is supposed to go. >_<

[Smaay]

I recently installed an Injen short ram and on the C.A.R.B approved set up, the breather hose is removed from the TB and plugged into the short ram. The only problem is that now it seems there has been a larger amount of blow by recirculating (I know this is by design for California's EGR) so I bought a Spectre breather filter, took off the hose connecting the TB to the crankcase, placed the filter, and connected the hose from the TB to my short ram. Doing this reduces the annoying blow by gunking up the TB and feeding cleaner air. Now if you are like me and live in California, this is an illegal mod since the vacuum routing has been tampered with, but if you are on good terms with law enforcement then you will not have to reroute the correct vacuum lines until smog.

As for any power increase; marginal. The fact that the blow by and crankcase pressure are no longer recirculating helps free up some withdrawn power. *Anyone please correct me if I am wrong*

I hope this answers your question! :]

what breather on the TB are you talking about?

I'm not looking for any power increase. I'm looking for cleaner air. Both times I've tore down my motor the intake has been filthy and gunked up. I just want to stick a breather filter on instead of routing a vacuum line directly to where "clean air" is supposed to go. >_<

you can totally do that. Its just a breather so you can route it to a filter. The 6th gen is a MAP based tuning so you dont have to worry about metered air

[yfn16]

Sounds good. I may just do a catch can if I can find some room.

[Smaay]

that is the recommended option

[yfn16]

I would rather just throw a filter on the case and block off the throttle body...

[mgnt232]

Started reading down this, and thinking catch can the whole time, if you're really worried about how clean your intake pipe is.. not that it really matters a whole lot.
I clean my catch can on the 3s every once in a while, and its disgusting lol

[Rawrssell]

I recently installed an Injen short ram and on the C.A.R.B approved set up, the breather hose is removed from the TB and plugged into the short ram. The only problem is that now it seems there has been a larger amount of blow by recirculating (I know this is by design for California's EGR) so I bought a Spectre breather filter, took off the hose connecting the TB to the crankcase, placed the filter, and connected the hose from the TB to my short ram. Doing this reduces the annoying blow by gunking up the TB and feeding cleaner air. Now if you are like me and live in California, this is an illegal mod since the vacuum routing has been tampered with, but if you are on good terms with law enforcement then you will not have to reroute the correct vacuum lines until smog.

As for any power increase; marginal. The fact that the blow by and crankcase pressure are no longer recirculating helps free up some withdrawn power. *Anyone please correct me if I am wrong*

I hope this answers your question! :]

what breather on the TB are you talking about?

I'm not looking for any power increase. I'm looking for cleaner air. Both times I've tore down my motor the intake has been filthy and gunked up. I just want to stick a breather filter on instead of routing a vacuum line directly to where "clean air" is supposed to go. >_<

you can totally do that. Its just a breather so you can route it to a filter. The 6th gen is a MAP based tuning so you dont have to worry about metered air

Sorry for the late reply! So from the crankcase there is that vacuum port that leads up to another port on the TB right behind the butterfly flap. I know with the Injen IS set up for CARB approval, the crankcase vacuum is ported onto the port provided on the short ram pipe. Considering that now there is a missing vacuum at the TB, they recommend placing a plug to prevent debris being sucked in but in my case I just used the port from the short ram and connected it to the port from the TB. I am sorry if this just made things complicated. I could take a photo if that helps.

[playr158]

a breather filter and plugging the TB side will be ok and won't do anything bad, its considered an older method now a days but it works.
A catch can is the proper way to do things.

[Special_Edy]

I wonder if the oil ingested through the pcv system has any positive benefit to the intake valves. There is already fuel from the injectors there to lube them but Im sure a tiny bit of oil doesnt hurt.