Previous Thread
Next Thread
Print Thread
vac pump users question #2853571
11/30/20 09:43 PM
11/30/20 09:43 PM
Joined: Dec 2006
Posts: 4,647
aotearoa
rebel Offline OP
master
rebel  Offline OP
master

Joined: Dec 2006
Posts: 4,647
aotearoa
I run a Moroso enhanced vac pump with a 10" regulator & generally it works great. But, when i cross the line & pull the chute, the breather seems to turn into a vape user & we get a heavy burst of fumes coming from the breather element. When we check the overflow back in the pit, I usually get an egg cup worth of oil out of it which i dont consider excessive, but we get a coating of oil around everything close to the breather. Anyway the track official has seen it & is asking questions. So what do you think is causing my problem? I pull from the front of the rocker covers & we have screens to deflect any large slashes of oil at the exit point, my regulator is connected to the pump so its not pulling large air volumes thru the engine, the catch can/overflow is a Stefs unit so its got baffles in it & its a deep unit so plenty of room to disperse any oil vapour Why does it fume so bad?

Re: vac pump users question [Re: rebel] #2853586
11/30/20 10:11 PM
11/30/20 10:11 PM
Joined: Nov 2015
Posts: 870
Missouri
J
jwb123 Offline
super stock
jwb123  Offline
super stock
J

Joined: Nov 2015
Posts: 870
Missouri
What I did to stop a similar issue, I just had a mist of oil on the inner fender well sometimes. I took off the breather and pushed in some coarse steel wool, for extra baffling and cut a strip of the mat used for oil spills and zip tied it around the filter. Change the matt about every ten runs. On my to do list is to fab a better breather tank this winter.

https://www.amazon.com/Brady-SPC-Oi...id=1606788604&sr=8-8&tag=mh0b-20

Re: vac pump users question [Re: rebel] #2853592
11/30/20 10:26 PM
11/30/20 10:26 PM
Joined: Aug 2004
Posts: 719
Seminole County FL to Plymouth...
Barry70GTX Offline
super stock
Barry70GTX  Offline
super stock

Joined: Aug 2004
Posts: 719
Seminole County FL to Plymouth...


NMCA NSS 67 Coronet
Re: vac pump users question [Re: Barry70GTX] #2853617
11/30/20 11:25 PM
11/30/20 11:25 PM
Joined: Jan 2003
Posts: 4,267
Morrow, OH
markz528 Offline
master
markz528  Offline
master

Joined: Jan 2003
Posts: 4,267
Morrow, OH


I use very similar...........


67 Coronet 500 9.610 @ 139.20 mph
67 Coronet 500 (street car) 14.82 @ 94 mph
69 GTX (clone) - build in progress......
Re: vac pump users question [Re: markz528] #2853623
11/30/20 11:43 PM
11/30/20 11:43 PM
Joined: Dec 2006
Posts: 4,647
aotearoa
rebel Offline OP
master
rebel  Offline OP
master

Joined: Dec 2006
Posts: 4,647
aotearoa
i've tried the wristbands, but they're not making f.all difference.

Re: vac pump users question [Re: rebel] #2853650
12/01/20 04:08 AM
12/01/20 04:08 AM
Joined: Aug 2003
Posts: 43,007
Bend,OR USA
C
Cab_Burge Offline
I Win
Cab_Burge  Offline
I Win
C

Joined: Aug 2003
Posts: 43,007
Bend,OR USA
I mounted my suction side fitting to the pump on top of the front of passenger side valve cover with the bypass valve beside it with the instructions I receive from GZ motor sports on my unit right next to suction side fitting. I added a long thin full width baffle with 1/4 inch holes in it under both fittings so it can suck oil off of the rocker arms and pushrods.
On your deal I would add a baffle and move the pressure relief valve to the motor as close as i could get it to the vacuum hose twocents
I had similar issues with mine at first until I added the baffle, it was blowing oil out of the breather cap after two runs, not anymore boogie


Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
Re: vac pump users question [Re: Cab_Burge] #2853665
12/01/20 08:05 AM
12/01/20 08:05 AM
Joined: Mar 2006
Posts: 9,791
MI, usa
dvw Offline
master
dvw  Offline
master

Joined: Mar 2006
Posts: 9,791
MI, usa
My regulator is mounted on the inner fender. It pulls from the upper front corner of the valve cover. No baffle. Stainless scrubbers in the resivoir. The top of and old sock on the breather to absorb drips. 20-25 passes pulls about 4 oz. of oil. GZ 101 pump.
Doug

0923121646.jpg
Re: vac pump users question [Re: dvw] #2853720
12/01/20 10:42 AM
12/01/20 10:42 AM
Joined: Aug 2003
Posts: 4,662
On the parachute mount
N
n20mstr Offline
master
n20mstr  Offline
master
N

Joined: Aug 2003
Posts: 4,662
On the parachute mount
What cyl heads?? Sounds like you have a lot of oil up top. Consider a better baffle in front of your pick up. I have an .080 sheet of alum that is within .100 of the valve cover as a baffle in front of my pick up. It just sounds like your overwhelming your pick up with oil under decel.


....BAD A$$ STREET CAR.....
Re: vac pump users question [Re: n20mstr] #2854140
12/02/20 05:50 AM
12/02/20 05:50 AM
Joined: Dec 2006
Posts: 4,647
aotearoa
rebel Offline OP
master
rebel  Offline OP
master

Joined: Dec 2006
Posts: 4,647
aotearoa
The heads are Indy -1's & the block is an Indymaxx so yeah, there's not a great big hole for the oil to drain back. But I am running a dry sump & one scavenge point is in the valley at the back where oil accumulates under hard acceleration. The vac pump is pulling from the front of the covers & the baffles are well protecting the exit point. The relief is one that mounts to the pump so its not that easy to mount on the engine, but I don't really see that as a cure. I've just added the Moroso oil seperator to try at the next outing. I had it so I just made a small hose & plumbed it in.

20201202_204537.jpg20201202_204643.jpg20201202_204713.jpg20201202_204810.jpg
Last edited by rebel; 12/02/20 05:53 AM.
Re: vac pump users question [Re: rebel] #2854235
12/02/20 11:24 AM
12/02/20 11:24 AM
Joined: Jan 2003
Posts: 19,304
Las Vegas
Al_Alguire Offline
I Live Here
Al_Alguire  Offline
I Live Here

Joined: Jan 2003
Posts: 19,304
Las Vegas
What puke tank are you using and how is it plumbed? Is it shared with the dry sump tanks puke tank? FWIW on my car I pull 19" of vaccuum and see noting but water. The dragster pulls 14" when sealed up and also pulls nothing but water. Both are pulled off of one valvecover. Be more intersted in your puke tank and plumbing at this point since you say it is not full but blowing everywhere.


"I am not ashamed to confess I am ignorant of what I do not know."

"It's never wrong to do the right thing"
Re: vac pump users question [Re: rebel] #2854253
12/02/20 11:44 AM
12/02/20 11:44 AM
Joined: May 2019
Posts: 701
Lake Villa Il
INTMD8 Offline
super stock
INTMD8  Offline
super stock

Joined: May 2019
Posts: 701
Lake Villa Il
Originally Posted by rebel
The vac pump is pulling from the front of the covers & the baffles are well protecting the exit point.


Are the baffles metal plate or screen as previously mentioned? If screen I don't think that would do anything to stop oil from getting pulled in.


69 Charger. 438ci Gen2 hemi. Flex fuel. Holley HP efi. 650rwhp @7250 510rwtq @5700
Re: vac pump users question [Re: Al_Alguire] #2854870
12/03/20 04:44 PM
12/03/20 04:44 PM
Joined: Dec 2006
Posts: 4,647
aotearoa
rebel Offline OP
master
rebel  Offline OP
master

Joined: Dec 2006
Posts: 4,647
aotearoa
Originally Posted by Al_Alguire
What puke tank are you using and how is it plumbed? Is it shared with the dry sump tanks puke tank? FWIW on my car I pull 19" of vaccuum and see noting but water. The dragster pulls 14" when sealed up and also pulls nothing but water. Both are pulled off of one valvecover. Be more intersted in your puke tank and plumbing at this point since you say it is not full but blowing everywhere.


Kinda hard to see as all my hoses are black, but yes it does share with the drysump tank & it just feeds via the fitting that comes with the Stefs system. I never get water, ever, only oil.

20201203_215549.jpg
Re: vac pump users question [Re: INTMD8] #2854927
12/03/20 08:26 PM
12/03/20 08:26 PM
Joined: Dec 2006
Posts: 4,647
aotearoa
rebel Offline OP
master
rebel  Offline OP
master

Joined: Dec 2006
Posts: 4,647
aotearoa
Originally Posted by INTMD8
Originally Posted by rebel
The vac pump is pulling from the front of the covers & the baffles are well protecting the exit point.


Are the baffles metal plate or screen as previously mentioned? If screen I don't think that would do anything to stop oil from getting pulled in.


Its metal plates & a mesh screen.

Last edited by rebel; 12/03/20 08:28 PM.






Powered by UBB.threads™ PHP Forum Software 7.7.1