Re: High performance engines and pcv systems
[Re: ahy]
#2508162
06/13/18 10:39 PM
06/13/18 10:39 PM
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Joined: Dec 2013
Posts: 4,704 Wichita
GY3
master
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master
Joined: Dec 2013
Posts: 4,704
Wichita
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Yep, I do the PCV valve on passenger cover and a K&N open breather modded to fit the stand on the drivers side cover.
I've used cheap, chrome Mr. Gasket breathers in the past and they simply can't flow enough air at higher rpm. Years ago my dipstick would blow out of the tube because of crankcase pressure buildup with one after 4.56 gear install..
'63 Dodge 330 11.19 @ 121 mph Pump gas, n/a, through the mufflers on street tires with 3.54's. 3,600 lbs. 10.01 @ 133mph with a 250 shot of nitrous an a splash of race gas. 1.36 60 ft. 3,700 lbs.
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Re: High performance engines and pcv systems
[Re: mopar dave]
#2508227
06/14/18 01:10 AM
06/14/18 01:10 AM
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Joined: Oct 2007
Posts: 4,213 New York
polyspheric
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master
Joined: Oct 2007
Posts: 4,213
New York
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The clean air intake and PCV to the manifold should be separated by the entire engine if possible to pass all the crankcase vapor through them. If they're both on one cover the case is never "flushed" and accumulates sulfuric acid and combustion products. Severe blowby is generally ring seal going away, and you already know what fixes that. A much bigger pan volume (longer, deeper, wider), for more air not more oil, reduces the amplitude of pressure spikes, so will any extension to the valley or covers. It's only a buffer, so shape doesn't matter as long as the connection to the air under the crank is large.
Boffin Emeritus
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Re: High performance engines and pcv systems
[Re: Spaceman Spiff]
#2508291
06/14/18 10:07 AM
06/14/18 10:07 AM
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Joined: Jan 2007
Posts: 8,043 Mt Morris Michigan
mopar dave
OP
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OP
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Mt Morris Michigan
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My PCV valve is a Billet style from billet specialties. Too much oil in the pan is not helping either. I will be installing an oil cooler this weekend, that will get the oil level back down. I also have an oil catch can im not using that i could install or use the tall breathers that Andy posted. Moroso also has something simular.
Last edited by mopar dave; 06/14/18 10:08 AM.
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Re: High performance engines and pcv systems
[Re: mopar dave]
#2508297
06/14/18 10:22 AM
06/14/18 10:22 AM
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Joined: Jan 2003
Posts: 13,402 Marion, South Carolina [><]
an8sec70cuda
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I Live Here
Joined: Jan 2003
Posts: 13,402
Marion, South Carolina [><]
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Pictured below is my wedge motor in my other car. Two -10 lines tee'd into a breather tank mounted next to the radiator. Works great. I have a vacuum pump on my hemi, but honestly, I wish I'd just done the same thing on it.
CHIP '70 hemicuda, 575" Hemi, 727, Dana 60 '69 road runner, 440-6, 18 spline 4 speed, Dana 60 '71 Demon, 340, low gear 904, 8.75 '73 Chrysler New Yorker, 440, 727, 8.75 '90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt '06 GMC 2500HD LBZ Duramax
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Re: High performance engines and pcv systems
[Re: mopar dave]
#2508370
06/14/18 01:31 PM
06/14/18 01:31 PM
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Joined: Jul 2004
Posts: 19,318 State of confusion
Thumperdart
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I Live Here
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Posts: 19,318
State of confusion
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Maybe thats part of my problem. 8qts in a 7qt pan. BIG problem try the opposite, less oil in a larger capacity pan and I run 6 qts. in an 8 qt. pan and zero issues forever........As we talked, my pcv is in a Ford truck breather full of foam which is higher up off of the valve cover helping to keep oil out of the manifold and more vapor as designed plus a home made oil separator right at the manifold............ Breather on one side, pcv on the other to pull THROUGH the engine......
Last edited by Thumperdart; 06/14/18 01:32 PM.
72 Dart 470 n/a BB stroker street car `THUMPER`...Check me out on FB Dominic Thumper for videos and lots of carb pics......760-900-3895.....
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Re: High performance engines and pcv systems
[Re: mopar dave]
#2508473
06/14/18 04:55 PM
06/14/18 04:55 PM
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Joined: Oct 2003
Posts: 11,686 W. Kentucky
justinp61
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I Live Here
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W. Kentucky
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What style breathers you using? Dave I honestly don't know, they were on the valve covers when I bought the engine. They are aluminum and had fittings in them for a header e-vac system. Sorry.
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