CFM Breather

[l2frankie]

My gauge shows the same but AP shows -8/-9 when car is warmed up.

Left my AP at home so I'll check later

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[Midnight_LMR]

sub'd

 

[David@FFtec]

First day using it...seems stay around -10/-9 @ idle now

10/9 in-hg? That's not good.

20 in-hg vacuum is equal to -10 psi. Be careful with the units.

 

[juan_tony1]

I'll have check and let you know. How you liking your shifter? Was the install simple as they say?

I love how short it is and install was super easy....hardest thing was making myself cut the old boot lol

 

[juan_tony1]

10/9 in-hg? That's not good.

Y is this not good??

 

[juan_tony1]

20 in-hg vacuum is equal to -10 psi. Be careful with the units.

OK I was reading of my a.p.

 

[ronv95]

Here is mine

 

[Tune+]

Y is this not good??

Because he doesn't understand the AP reads in PSI not inhg. You're fine.

 

[juan_tony1]

Because he doesn't understand the AP reads in PSI not inhg. You're fine.

Good to know....and yes a.p. -9-10, off the gauge from the car -20 so that's normal. A.p. also says -5 during cruising.

 

[l2frankie]

any updates?

 

[lisandra]

I have one, took it off. Full boost meant oil on the engine cover

 

[Boosting Stangs]

I have one, took it off. Full boost meant oil on the engine cover

How much boost is your engine producing?

 

[VargasTurboTech]

I have one, took it off. Full boost meant oil on the engine cover

This is exactly why you need it. Its doing its job, you are getting excessive crankcase pressure, for what reason that is for you to determine. This is basically the last place pressure can escape the crankcase under full boost. So basically whatever PCV/CCV system you have on the car is not adequate to vent crankcase pressure under full boost, so it is being pushed out of the breather as it is designed to do.

Now with the breather removed, that pressure is being pushed out seals, etc etc. Wherever the pressure can escape now that is where it is going because you removed the path of least resistance.

You need to find out why you have excessive CC pressure, not remove the relieve valve. I watch mine on the dyno, and even with the dual UPR can on the car it still is venting some pressure at high boost high RPM, but no oil is coming out of it, I can just watch it venting the pressure / Vapors when I do runs. This is exactly what it is designed to do, not vent vacuum at idle so you get proper venting, and vent excess pressure.

Something you prob do not want to hear, but anytime you have excessive oil being pushed out of crankcase breathers, you usually have boost being pushed past the rings causing the CC to be overly pressurized, this is very very bad for your motor, and usually means something is wrong with your motor. Perform a compression, and leak down test.

 

[Brad]

This is exactly why you need it. Its doing its job, you are getting excessive crankcase pressure, for what reason that is for you to determine. This is basically the last place pressure can escape the crankcase under full boost. So basically whatever PCV/CCV system you have on the car is not adequate to vent crankcase pressure under full boost, so it is being pushed out of the breather as it is designed to do.

Now with the breather removed, that pressure is being pushed out seals, etc etc. Wherever the pressure can escape now that is where it is going because you removed the path of least resistance.

You need to find out why you have excessive CC pressure, not remove the relieve valve. I watch mine on the dyno, and even with the dual UPR can on the car it still is venting some pressure at high boost high RPM, but no oil is coming out of it, I can just watch it venting the pressure / Vapors when I do runs. This is exactly what it is designed to do, not vent vacuum at idle so you get proper venting, and vent excess pressure.

Something you prob do not want to hear, but anytime you have excessive oil being pushed out of crankcase breathers, you usually have boost being pushed past the rings causing the CC to be overly pressurized, this is very very bad for your motor, and usually means something is wrong with your motor. Perform a compression, and leak down test.

 

[Tune+]

I have two that just arrived from them. I put it on my daily driver Fiesta ST running E30 and 25psi. Going to see how it looks after next week. Drivability hasn't changed, but I will be able to see how much oil is in the catch can after a week.

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