572 Vacum Pump
#2625402
02/24/19 01:08 PM
02/24/19 01:08 PM
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Posts: 195 Italy
Raffaplymouth60
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Hello , i have 572 race engine with Moroso Vacum System,separator and catch can ... after 4/5 warmup , found half quart of oil ! look too much oil !
Last edited by Raffaplymouth60; 02/24/19 01:12 PM.
1970 Cuda 496 street driven 9.22@150 1971 Demon 572 7.82@176 1957 Desoto Adventurer Convertible 345 Hemi 1958 Plymouth Fury Christine 2008 Dodge Ram 1500 Hemi 1970 Dodge ChallengerRT 6pack 4 speed 1 of 135 1968 Dodge Charger RT 4 speed
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Re: 572 Vacum Pump
[Re: Raffaplymouth60]
#2625477
02/24/19 03:32 PM
02/24/19 03:32 PM
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Raffaplymouth60
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Pulling from valley pan .. no baffle .. i would put on valve cover
1970 Cuda 496 street driven 9.22@150 1971 Demon 572 7.82@176 1957 Desoto Adventurer Convertible 345 Hemi 1958 Plymouth Fury Christine 2008 Dodge Ram 1500 Hemi 1970 Dodge ChallengerRT 6pack 4 speed 1 of 135 1968 Dodge Charger RT 4 speed
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Re: 572 Vacum Pump
[Re: Raffaplymouth60]
#2625481
02/24/19 03:37 PM
02/24/19 03:37 PM
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Raffaplymouth60
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Last edited by Raffaplymouth60; 02/24/19 03:38 PM.
1970 Cuda 496 street driven 9.22@150 1971 Demon 572 7.82@176 1957 Desoto Adventurer Convertible 345 Hemi 1958 Plymouth Fury Christine 2008 Dodge Ram 1500 Hemi 1970 Dodge ChallengerRT 6pack 4 speed 1 of 135 1968 Dodge Charger RT 4 speed
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Re: 572 Vacum Pump
[Re: Raffaplymouth60]
#2625487
02/24/19 03:49 PM
02/24/19 03:49 PM
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Joined: Jan 2003
Posts: 31,071 Oregon
AndyF
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Pulling from valley pan .. no baffle .. i would put on valve cover It is very, very difficult to pull from the valley without sucking up a lot of oil. I've never seen it done on a race engine but maybe someone has figured it out. Some factory engines used a breather in the valley but they had fairly elaborate oil vapor traps. Basically tanks filled with steel wool and lots of baffles. Look at the FE Ford for example. The valve cover is the best place to pull from but even there you'll need some sort of baffle.
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Re: 572 Vacum Pump
[Re: Raffaplymouth60]
#2625491
02/24/19 03:56 PM
02/24/19 03:56 PM
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Posts: 195 Italy
Raffaplymouth60
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ok will move to the left valve cover , the only problem is the 12 AN fitting can touch the hood ... on the side of the cover is not possible because the baffle fitting inside can touch to the rocker arm )
Last edited by Raffaplymouth60; 02/24/19 04:00 PM.
1970 Cuda 496 street driven 9.22@150 1971 Demon 572 7.82@176 1957 Desoto Adventurer Convertible 345 Hemi 1958 Plymouth Fury Christine 2008 Dodge Ram 1500 Hemi 1970 Dodge ChallengerRT 6pack 4 speed 1 of 135 1968 Dodge Charger RT 4 speed
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Re: 572 Vacum Pump
[Re: Raffaplymouth60]
#2625497
02/24/19 04:01 PM
02/24/19 04:01 PM
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Joined: Oct 2007
Posts: 4,210 New York
polyspheric
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I agree. All strokers have greater crankcase pressure cycling than stock: larger displacement in the same case volume. No, the pistons going the other way don't eliminate this, and there is also bay-to-bay pumping between adjacent cylinder pairs.
The valley is exposed to crankshaft throw-off. If it were the only source, it can be improved by adding a very tall vertical cylinder and pull from the top. The droplets will fall back and only mist will evacuate, but (duh) there's a space problem. Hint: the cylinder can have bends in it - the height is the important part. A vertical stub added to the valley going immediately to a 90° fitting, the a horizontal leg, 90° again should be able to bypass your manifold.
The valve covers are at least isolated from the crank, but still need to be masked/baffled inside (and in the separator) from flying droplets.
Is your dipstick tube sealed?
For both: a large diameter source (1"+) slows down vapor speed and encourages droplet fall-back.
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Re: 572 Vacum Pump
[Re: Raffaplymouth60]
#2625527
02/24/19 04:59 PM
02/24/19 04:59 PM
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Raffaplymouth60
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now the dipstick is not sealed
1970 Cuda 496 street driven 9.22@150 1971 Demon 572 7.82@176 1957 Desoto Adventurer Convertible 345 Hemi 1958 Plymouth Fury Christine 2008 Dodge Ram 1500 Hemi 1970 Dodge ChallengerRT 6pack 4 speed 1 of 135 1968 Dodge Charger RT 4 speed
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Re: 572 Vacum Pump
[Re: tubtar]
#2625570
02/24/19 06:35 PM
02/24/19 06:35 PM
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Joined: Mar 2014
Posts: 195 Italy
Raffaplymouth60
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Could you plumb it into the front of the valve cover with an upward facing baffle on the inside ? I don't think that even the surge from braking would flood this , unless you are trapping a large volume of oil in the heads. i think this is a solution
1970 Cuda 496 street driven 9.22@150 1971 Demon 572 7.82@176 1957 Desoto Adventurer Convertible 345 Hemi 1958 Plymouth Fury Christine 2008 Dodge Ram 1500 Hemi 1970 Dodge ChallengerRT 6pack 4 speed 1 of 135 1968 Dodge Charger RT 4 speed
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Re: 572 Vacum Pump
[Re: polyspheric]
#2625571
02/24/19 06:38 PM
02/24/19 06:38 PM
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Joined: Mar 2014
Posts: 195 Italy
Raffaplymouth60
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I agree. All strokers have greater crankcase pressure cycling than stock: larger displacement in the same case volume. No, the pistons going the other way don't eliminate this, and there is also bay-to-bay pumping between adjacent cylinder pairs.
The valley is exposed to crankshaft throw-off. If it were the only source, it can be improved by adding a very tall vertical cylinder and pull from the top. The droplets will fall back and only mist will evacuate, but (duh) there's a space problem. Hint: the cylinder can have bends in it - the height is the important part. A vertical stub added to the valley going immediately to a 90° fitting, the a horizontal leg, 90° again should be able to bypass your manifold.
The valve covers are at least isolated from the crank, but still need to be masked/baffled inside (and in the separator) from flying droplets.
Is your dipstick tube sealed?
For both: a large diameter source (1"+) slows down vapor speed and encourages droplet fall-back. will make a hole on the left cover frobt side ... i have Moroso fitting with little holes inside ..
1970 Cuda 496 street driven 9.22@150 1971 Demon 572 7.82@176 1957 Desoto Adventurer Convertible 345 Hemi 1958 Plymouth Fury Christine 2008 Dodge Ram 1500 Hemi 1970 Dodge ChallengerRT 6pack 4 speed 1 of 135 1968 Dodge Charger RT 4 speed
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Re: 572 Vacum Pump
[Re: Raffaplymouth60]
#2625609
02/24/19 08:52 PM
02/24/19 08:52 PM
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Joined: Jan 2003
Posts: 19,382 Las Vegas
Al_Alguire
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My Predator pulls off the front of the valvecover as well. Never pulls any oil at all either. The dragster pulls off the top of the cover and we never see any oil there either.
"I am not ashamed to confess I am ignorant of what I do not know."
"It's never wrong to do the right thing"
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