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Pan-e-vac install #2990890
12/01/21 03:23 PM
12/01/21 03:23 PM
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Puyallup, WA
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StealthWedge67 Offline OP
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I’m going to be installing a pan-e-vac system on the Satellite, and have a question about the location. The directions say to install in the collector just behind the merge. I’d rather put them in the exhaust extension just after the header. Pipe is 3”, same size as the header collector. Will this be as effective as in the header would be? (Approx 3 or 4 inches further downstream)

Before you reply with “don’t bother with a Pan-e-vac setup”, know that I’m not looking for performance, I’m just looking to replace the breathers that currently get the engine compartment all dirty, and perhaps help with any oil leaks. I’ve notice both since eliminating the PCV system a few years ago. I’ve got it, so I’m going to install it.


LemonWedge - Street heavy / Strip ready - 11.07 @ 120
Re: Pan-e-vac install [Re: StealthWedge67] #2990904
12/01/21 03:47 PM
12/01/21 03:47 PM
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Bend,OR USA
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Cab_Burge Offline
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Bend,OR USA
Do you run mufflers on this car? Is it a street and strip car?
If so don't use that system, the back pressure makes it not work well tsk twocents
If it is a race only car mounting into the header collector extension near the flanges work well, as long as you have 6+ inches of collector pipe after the valve up
If you are using mufflers go back to the PCV system and help keep moisture out of the oil twocents


Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
Re: Pan-e-vac install [Re: Cab_Burge] #2990912
12/01/21 03:57 PM
12/01/21 03:57 PM
Joined: Jan 2003
Posts: 20,645
So Near, Yet So Far
topside Offline
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So Near, Yet So Far
They definitely don't work as well with even a 3.5" short exhaust with Dynomax bullets, I proved that on my racecar.
Granted, low-tension rings, but it was the minimum exhaust/muffler I could add (93Db rule) on a fresh & healthy engine.
I did a GM electric vacuum pump and that worked fine.
I understand the desire to get the oil vapor into the exhaust without going through the combustion chamber, but a pump is better at that.

Re: Pan-e-vac install [Re: topside] #2990935
12/01/21 05:12 PM
12/01/21 05:12 PM
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Puyallup, WA
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StealthWedge67 Offline OP
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Technically, it has mufflers. But they are Flowmaster FlowFX straight through bullets. I can’t imagine that they create any backpressure whatsoever (??). Like I said before, I’m not trying to seal low tension rings, I’m simply getting rid of the breather setup that I am unhappy with. If it simply accomplishes what the PCV system did, I’ll be happy as heck. Car is technically street legal, but has become pretty much a dedicated race-only car.

B49F6468-7D0D-4016-B76E-56723EEC6E65.jpeg
Last edited by StealthWedge67; 12/01/21 05:19 PM.

LemonWedge - Street heavy / Strip ready - 11.07 @ 120
Re: Pan-e-vac install [Re: StealthWedge67] #2990938
12/01/21 05:35 PM
12/01/21 05:35 PM
Joined: Oct 2003
Posts: 3,999
South Park, Pa.
68LAR Offline
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Well, maybe I'm just lucky, who knows? My car is a street strip 4 speed car. SFT cam, not too big, 259/266. .600'+ lift. 2" CPPA's with 3" to the back bumper. Magna flows. I run a evac sustem that pulls 5" at idle. No pcv anymore. I did run both at one time. This system works great for me. It can work for you with a straight thru muffler. Any other type of muffler will create an issue. Just my 2 cents.


4 speed street legal. Best time 10.99 @ 124 mph on 93 octane pump gas @ 3926# total weight
Re: Pan-e-vac install [Re: 68LAR] #2990941
12/01/21 05:55 PM
12/01/21 05:55 PM
Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY Offline
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Originally Posted by 68LAR
Well, maybe I'm just lucky, who knows? My car is a street strip 4 speed car. SFT cam, not too big, 259/266. .600'+ lift. 2" CPPA's with 3" to the back bumper. Magna flows. I run a evac sustem that pulls 5" at idle. No pcv anymore. I did run both at one time. This system works great for me. It can work for you with a straight thru muffler. Any other type of muffler will create an issue. Just my 2 cents.


I sure would like to see a evac pull 5"... are you using a water pressure gauge or merc.. when testing
exhaust we use inch of merc(very different)
wave

Re: Pan-e-vac install [Re: MR_P_BODY] #2990952
12/01/21 06:18 PM
12/01/21 06:18 PM
Joined: Oct 2003
Posts: 3,999
South Park, Pa.
68LAR Offline
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South Park, Pa.
Originally Posted by MR_P_BODY
Originally Posted by 68LAR
Well, maybe I'm just lucky, who knows? My car is a street strip 4 speed car. SFT cam, not too big, 259/266. .600'+ lift. 2" CPPA's with 3" to the back bumper. Magna flows. I run a evac sustem that pulls 5" at idle. No pcv anymore. I did run both at one time. This system works great for me. It can work for you with a straight thru muffler. Any other type of muffler will create an issue. Just my 2 cents.


I sure would like to see a evac pull 5"... are you using a water pressure gauge or merc.. when testing
exhaust we use inch of merc(very different)
wave
. Just a run of the mill vacuum gauge plugged into the hose at the valve cover. Nothing “Hi Tech”. I have no leaks and I’m completely happy with the setup. The key is the straight thru mufflers and possibly the cam. You can’t have a restriction in the exhaust. Take me at my word or not. No big deal. It can be done and work. My car is proof. An easy way to see if your system is working is to put a piece of paper over the hose at valve cover. If it sticks, you got vacuum. Even 1” of vacuum is good.

Last edited by 68LAR; 12/01/21 07:01 PM.

4 speed street legal. Best time 10.99 @ 124 mph on 93 octane pump gas @ 3926# total weight
Re: Pan-e-vac install [Re: 68LAR] #2990961
12/01/21 07:10 PM
12/01/21 07:10 PM
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Posts: 11,408
Fulton County, PA
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CMcAllister Offline
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Mufflers of any kind reduce the effectiveness of a Vac-u-pan system. Even a collector muffler like a Borla or Dynamax. It will still work, not as well. Exhaust flow across the tube is what makes the vacuum. Placement of the probe matters as well.

The Moroso vac-u-pan specific breathers and check valves along with the tubes with the whistle cut work best.


If the results don't match the theory, change the theory.
Re: Pan-e-vac install [Re: CMcAllister] #2990969
12/01/21 07:30 PM
12/01/21 07:30 PM
Joined: Oct 2003
Posts: 3,999
South Park, Pa.
68LAR Offline
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South Park, Pa.
Originally Posted by CMcAllister
Mufflers of any kind reduce the effectiveness of a Vac-u-pan system. Even a collector muffler like a Borla or Dynamax. It will still work, not as well. Exhaust flow across the tube is what makes the vacuum. Placement of the probe matters as well.

The Moroso vac-u-pan specific breathers and check valves along with the tubes with the whistle cut work best.
. This too. Very important is the placement of the tube in the collector.


4 speed street legal. Best time 10.99 @ 124 mph on 93 octane pump gas @ 3926# total weight
Re: Pan-e-vac install [Re: 68LAR] #2991109
12/02/21 12:07 AM
12/02/21 12:07 AM
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Puyallup, WA
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StealthWedge67 Offline OP
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Can someone show me a “whistle cut”?


LemonWedge - Street heavy / Strip ready - 11.07 @ 120
Re: Pan-e-vac install [Re: 68LAR] #2991111
12/02/21 12:15 AM
12/02/21 12:15 AM
Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY Offline
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Romeo MI
Originally Posted by 68LAR
Originally Posted by CMcAllister
Mufflers of any kind reduce the effectiveness of a Vac-u-pan system. Even a collector muffler like a Borla or Dynamax. It will still work, not as well. Exhaust flow across the tube is what makes the vacuum. Placement of the probe matters as well.

The Moroso vac-u-pan specific breathers and check valves along with the tubes with the whistle cut work best.
. This too. Very important is the placement of the tube in the collector.


I did a study on this when I was back at work.. standard was about 1/4" of vac(merc) at idle
and up to about 4-5" of merc at throttle with no muffs
round figure... 1" of merc is equal to 13.5" of water
wave

Last edited by MR_P_BODY; 12/02/21 12:33 AM.
Re: Pan-e-vac install [Re: StealthWedge67] #2991115
12/02/21 12:41 AM
12/02/21 12:41 AM
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Posts: 4,319
Puyallup, WA
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StealthWedge67 Offline OP
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Originally Posted by StealthWedge67
Can someone show me a “whistle cut”?


Never mind…. I see it now.


LemonWedge - Street heavy / Strip ready - 11.07 @ 120






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