Breather Question - Ford Mustang Forums : Corral.net Mustang Forum
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post #1 of 23 Old 03-30-2019, 10:40 AM Thread Starter
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Breather Question

What is a good breather set up to go into my oil fill on my valve cover?

LMR and summit have them.

Curious how to properly run a breather set up on a EFI set up. Only the passenger side has the oil fill so is that enough?

Never run breathers before so looking for suggestions.


1989 GT - 347 build in progress
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post #2 of 23 Old 03-30-2019, 10:56 AM
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race car?


89 GT gr-40, KB2200(10psi), tweecer R/T,LC-1, 22gal cell, w/tailpipes.
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post #3 of 23 Old 03-30-2019, 11:08 AM
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Are you running a pcv? If so then you don’t want the breather.

I ran a catch can from my pcv valve to my intake. It helped with the little bit of oil that would occasionally get sucked in.

1996 Mustang
347, 205 11R's, Box R Intake, Ported lower, custom comp cam, 42lb injectors, 255LPH, pro-m 80, 75mm Cheap-ass TB, 1 3/4 x 3in LT's, exhaust by me, A5 trans, 4.10

422WHP/456Ft/lb. Tuned using QH by Tony @ Tuners Inc.
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post #4 of 23 Old 03-30-2019, 12:55 PM Thread Starter
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Yes but not sure that’s enough.

How do you set up the catch can?

I’m pulling my upper off to retorque my lower now that I’ve got a bunch of heat cycles on my new motor so figue now is good time to do it

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Originally Posted by 96pushrod View Post
Are you running a pcv? If so then you don’t want the breather.

I ran a catch can from my pcv valve to my intake. It helped with the little bit of oil that would occasionally get sucked in.

1989 GT - 347 build in progress
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post #5 of 23 Old 03-30-2019, 12:56 PM Thread Starter
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Street/strip car but motor is high compression 347 with a big cam in it.


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race car?

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post #6 of 23 Old 03-30-2019, 02:28 PM
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Originally Posted by Stangdawg View Post
Yes but not sure that’s enough.

How do you set up the catch can?

I’m pulling my upper off to retorque my lower now that I’ve got a bunch of heat cycles on my new motor so figue now is good time to do it

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Originally Posted by 96pushrod View Post
Are you running a pcv? If so then you don’t want the breather.

I ran a catch can from my pcv valve to my intake. It helped with the little bit of oil that would occasionally get sucked in.
I just ended up using the steeda oil seperator kit. Works well.

1996 Mustang
347, 205 11R's, Box R Intake, Ported lower, custom comp cam, 42lb injectors, 255LPH, pro-m 80, 75mm Cheap-ass TB, 1 3/4 x 3in LT's, exhaust by me, A5 trans, 4.10

422WHP/456Ft/lb. Tuned using QH by Tony @ Tuners Inc.
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post #7 of 23 Old 03-30-2019, 07:54 PM
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Quote:
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Street/strip car but motor is high compression 347 with a big cam in it.
if it doesn't have excessive blowby, you can use a separator and upsize the lines from the PCV, no breathers

89 GT gr-40, KB2200(10psi), tweecer R/T,LC-1, 22gal cell, w/tailpipes.
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post #8 of 23 Old 03-30-2019, 08:54 PM Thread Starter
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I’m getting some smoke on start up and on hard downshifts.

Need to figure how to route everything right now I’ve got regular PCV on my Systemax and probably not enough


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Quote:
Originally Posted by Stangdawg View Post
Street/strip car but motor is high compression 347 with a big cam in it.
if it doesn't have excessive blowby, you can use a separator and upsize the lines to it through from the PCV, no breathers

1989 GT - 347 build in progress
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post #9 of 23 Old 03-30-2019, 09:09 PM
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if i can remember those intakes have poor baffling

89 GT gr-40, KB2200(10psi), tweecer R/T,LC-1, 22gal cell, w/tailpipes.
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post #10 of 23 Old 03-30-2019, 09:13 PM
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Quote:
Originally Posted by Stangdawg View Post
I’m getting some smoke on start up and on hard downshifts.

Need to figure how to route everything right now I’ve got regular PCV on my Systemax and probably not enough


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Originally Posted by indy2000 View Post
Quote:
Originally Posted by Stangdawg View Post
Street/strip car but motor is high compression 347 with a big cam in it.
if it doesn't have excessive blowby, you can use a separator and upsize the lines to it through from the PCV, no breathers
I had some small puffs on startup as well. Got this and it went away:

https://www.steeda.com/steeda-mustan...-555-3710.html

It doesn’t collect much. I’ve put a few hundred hard miles since install and there’s probably only about a tbsp or so of liquid in there.


1996 Mustang
347, 205 11R's, Box R Intake, Ported lower, custom comp cam, 42lb injectors, 255LPH, pro-m 80, 75mm Cheap-ass TB, 1 3/4 x 3in LT's, exhaust by me, A5 trans, 4.10

422WHP/456Ft/lb. Tuned using QH by Tony @ Tuners Inc.
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post #11 of 23 Old 04-01-2019, 11:39 AM Thread Starter
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Got any pictures of your set-up?

So do I just T off the of hose between the PCV and the intake to the separator?

I've got this coming in the mail....

Quote:
Originally Posted by 96pushrod View Post
I had some small puffs on startup as well. Got this and it went away:

https://www.steeda.com/steeda-mustan...-555-3710.html

It doesnít collect much. Iíve put a few hundred hard miles since install and thereís probably only about a tbsp or so of liquid in there.

1989 GT - 347 build in progress
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post #12 of 23 Old 04-01-2019, 12:02 PM
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I got rid of my pcv. I have an efi turbo setup. I have a breather on the passenger side and one where the pcv valve used to be on the back of the lower intake. I am making 17lbs of boost with my set up and donít seem to be having any issues

1992 black notchback... 347 boss block, afr 185 renegade, 80lb injectors, edelbrock rpm II, on3 7675, tko 500, 3.55 gears
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post #13 of 23 Old 04-01-2019, 08:02 PM
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Quote:
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Got any pictures of your set-up?

So do I just T off the of hose between the PCV and the intake to the separator?

I've got this coming in the mail.
I’ll take a picture when I’m back at the shop tomorrow.

But you’ve pretty much got it. You just connect the pcv vac line to the inlet on the seperator, then connect the line on the outlet side of the seperator to the intake.

They call for it to be connected to the strut tower but I just fab’d a little 90* bracket and riveted it to the firewall where the strut tower brace used to be. I’ll get a pic for you tomorrow. Took like 5 mins to install

1996 Mustang
347, 205 11R's, Box R Intake, Ported lower, custom comp cam, 42lb injectors, 255LPH, pro-m 80, 75mm Cheap-ass TB, 1 3/4 x 3in LT's, exhaust by me, A5 trans, 4.10

422WHP/456Ft/lb. Tuned using QH by Tony @ Tuners Inc.
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post #14 of 23 Old 04-02-2019, 02:30 PM Thread Starter
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Thanks, appreciate it. Rather not reinvent the wheel and put it in a good location rather than find out the hard way where not to put it.

Quote:
Originally Posted by 96pushrod View Post
Quote:
Originally Posted by Stangdawg View Post
Got any pictures of your set-up?

So do I just T off the of hose between the PCV and the intake to the separator?

I've got this coming in the mail.
I’ll take a picture when I’m back at the shop tomorrow.

But you’ve pretty much got it. You just connect the pcv vac line to the inlet on the seperator, then connect the line on the outlet side of the seperator to the intake.

They call for it to be connected to the strut tower but I just fab’d a little 90* bracket and riveted it to the firewall where the strut tower brace used to be. I’ll get a pic for you tomorrow. Took like 5 mins to install

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post #15 of 23 Old 04-02-2019, 04:07 PM
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Quote:
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Thanks, appreciate it. Rather not reinvent the wheel and put it in a good location rather than find out the hard way where not to put it.

Quote:
Originally Posted by 96pushrod View Post
Quote:
Originally Posted by Stangdawg View Post
Got any pictures of your set-up?

So do I just T off the of hose between the PCV and the intake to the separator?

I've got this coming in the mail.
I’ll take a picture when I’m back at the shop tomorrow.

But you’ve pretty much got it. You just connect the pcv vac line to the inlet on the seperator, then connect the line on the outlet side of the seperator to the intake.

They call for it to be connected to the strut tower but I just fab’d a little 90* bracket and riveted it to the firewall where the strut tower brace used to be. I’ll get a pic for you tomorrow. Took like 5 mins to install
I attached a couple pictures. I just fab’d a little 90* and painted everything black to match.

Don’t mind the rest of the car, it’s all taken apart to get the body painted.

The little bit of liquid in the reservoir is from a few hundred hard miles.

A93C7F33-31E3-4BEF-B183-ABD4515A6533_1554235566938.jpg77401C91-A163-4F93-A4C1-035316D0B777_1554235552097.jpg

1996 Mustang
347, 205 11R's, Box R Intake, Ported lower, custom comp cam, 42lb injectors, 255LPH, pro-m 80, 75mm Cheap-ass TB, 1 3/4 x 3in LT's, exhaust by me, A5 trans, 4.10

422WHP/456Ft/lb. Tuned using QH by Tony @ Tuners Inc.
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post #16 of 23 Old 04-02-2019, 09:33 PM Thread Starter
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I’ve still got AC so don’t have the same location I think I’ll mount mine next to the vacuum ports on driver side.

Will be a project for this weekend.


Quote:
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Quote:
Originally Posted by Stangdawg View Post
Thanks, appreciate it. Rather not reinvent the wheel and put it in a good location rather than find out the hard way where not to put it.

Quote:
Originally Posted by 96pushrod View Post
Quote:
Originally Posted by Stangdawg View Post
Got any pictures of your set-up?

So do I just T off the of hose between the PCV and the intake to the separator?

I've got this coming in the mail.
I’ll take a picture when I’m back at the shop tomorrow.

But you’ve pretty much got it. You just connect the pcv vac line to the inlet on the seperator, then connect the line on the outlet side of the seperator to the intake.

They call for it to be connected to the strut tower but I just fab’d a little 90* bracket and riveted it to the firewall where the strut tower brace used to be. I’ll get a pic for you tomorrow. Took like 5 mins to install
I attached a couple pictures. I just fab’d a little 90* and painted everything black to match.

Don’t mind the rest of the car, it’s all taken apart to get the body painted.

The little bit of liquid in the reservoir is from a few hundred hard miles.

Attachment 978166Attachment 978164

1989 GT - 347 build in progress
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post #17 of 23 Old 04-03-2019, 08:43 PM
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I ditched the PCV and now run two breathers, zero issues. Back hole is plugged.
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post #18 of 23 Old 04-03-2019, 08:48 PM Thread Starter
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What are you using for valve covers?

I’m hoping the oil seperator does the trick don’t want to have to redo my valve covers and gaskets

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I ditched the PCV and now run two breathers, zero issues. Back hole is plugged.

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post #19 of 23 Old 04-03-2019, 10:18 PM
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With a n/a setup I’d be surprised if the oil seperator doesn’t solve your problem. You’re only running a tad more compression than me and it cleared my exhaust up.

Ditching the pcv system really shouldn’t be necessary until you go forced induction.

1996 Mustang
347, 205 11R's, Box R Intake, Ported lower, custom comp cam, 42lb injectors, 255LPH, pro-m 80, 75mm Cheap-ass TB, 1 3/4 x 3in LT's, exhaust by me, A5 trans, 4.10

422WHP/456Ft/lb. Tuned using QH by Tony @ Tuners Inc.
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post #20 of 23 Old 04-03-2019, 10:48 PM
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Ran a breather for a few years and got tired of oil mist. I put a check valve in the PVC line and now run a PVC setup again.
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post #21 of 23 Old 04-04-2019, 07:57 PM
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best of all

every local home depot carries the PVC so you can get the correct size!!
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89 GT gr-40, KB2200(10psi), tweecer R/T,LC-1, 22gal cell, w/tailpipes.
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post #22 of 23 Old 04-05-2019, 08:40 AM
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Quote:
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I ditched the PCV and now run two breathers, zero issues. Back hole is plugged.
That set up must make a mess with the oil mist when on boost?
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post #23 of 23 Old 04-12-2019, 08:45 AM
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Doesn’t make a mess at all. Zero drips, have baffles inside the covers. Just a set of Stock style aftermarket aluminum covers, screw in filter in oil fill and I drilled passenger side and baffled for filter.
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