Previous Thread
Next Thread
Print Thread
Page 1 of 3 1 2 3
High performance engines and pcv systems #2508149
06/13/18 10:17 PM
06/13/18 10:17 PM
Joined: Jan 2007
Posts: 8,027
Mt Morris Michigan
mopar dave Offline OP
master
mopar dave  Offline OP
master

Joined: Jan 2007
Posts: 8,027
Mt Morris Michigan
What needed to keep the oil in the engine at higher rpm's. In my 511 i have a pcv valve in the pass side cover and a -10 hose on the driver side cover connected to the air cleaner. Not enough as it blows out more oil now than it did with just 2 breathers. Should there be breathers in the covers as well as pcv valve?

Re: High performance engines and pcv systems [Re: mopar dave] #2508158
06/13/18 10:32 PM
06/13/18 10:32 PM
Joined: Jan 2007
Posts: 7,664
IN
A
ahy Offline
master
ahy  Offline
master
A

Joined: Jan 2007
Posts: 7,664
IN
The "classic" setup on a (moderately) high po engine is PCV valve on pass side and an open VC breather on drivers side. Valve covers well baffled on both sides.

This has worked well for me on a warm 496 that sees road track time.

I guess the 10AN line to your air cleaner is a problem. I guess a fouled air cleaner element?

A high cylinder pressure high po engine will have more blow by when hammered vs a stock engine (even if the hi po engine is healthy and tight). It needs to have a free vent to atmosphere for those times. The vent will act as an air intake for the crankcase when cruising... it lets air in and the PCV sucks fumes out.

Re: High performance engines and pcv systems [Re: ahy] #2508160
06/13/18 10:36 PM
06/13/18 10:36 PM
Joined: Jan 2007
Posts: 8,027
Mt Morris Michigan
mopar dave Offline OP
master
mopar dave  Offline OP
master

Joined: Jan 2007
Posts: 8,027
Mt Morris Michigan
Ok. So makes no difference which side pcv valve is on? Any harm with the -10 hose to air cleaner and a breather in same cover?

Re: High performance engines and pcv systems [Re: ahy] #2508162
06/13/18 10:39 PM
06/13/18 10:39 PM
Joined: Dec 2013
Posts: 4,651
Wichita
G
GY3 Offline
master
GY3  Offline
master
G

Joined: Dec 2013
Posts: 4,651
Wichita
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.

Re: High performance engines and pcv systems [Re: mopar dave] #2508181
06/13/18 11:15 PM
06/13/18 11:15 PM
Joined: Jan 2003
Posts: 30,945
Oregon
A
AndyF Offline
I Win
AndyF  Offline
I Win
A

Joined: Jan 2003
Posts: 30,945
Oregon
I use a #12 Peterson breather. They are really well built and screw right into the valve cover. If the Peterson breather doesn't work then you can hook up a remote breather tank. I've done the remote tank before and it works really well for big race engines. Mount the remote tank up by the radiator and run a #12 line from the valve cover.

DSC_2521 (Large).jpeg
Re: High performance engines and pcv systems [Re: AndyF] #2508189
06/13/18 11:23 PM
06/13/18 11:23 PM
Joined: Jan 2007
Posts: 8,027
Mt Morris Michigan
mopar dave Offline OP
master
mopar dave  Offline OP
master

Joined: Jan 2007
Posts: 8,027
Mt Morris Michigan
2 of those breathers on 1 cover would look cool and provide plenty of venting as well.

Re: High performance engines and pcv systems [Re: mopar dave] #2508227
06/14/18 01:10 AM
06/14/18 01:10 AM
Joined: Oct 2007
Posts: 4,205
New York
polyspheric Offline
master
polyspheric  Offline
master

Joined: Oct 2007
Posts: 4,205
New York
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
Re: High performance engines and pcv systems [Re: polyspheric] #2508237
06/14/18 01:57 AM
06/14/18 01:57 AM
Joined: Jan 2007
Posts: 8,027
Mt Morris Michigan
mopar dave Offline OP
master
mopar dave  Offline OP
master

Joined: Jan 2007
Posts: 8,027
Mt Morris Michigan
Maybe thats part of my problem. 8qts in a 7qt pan.

Re: High performance engines and pcv systems [Re: mopar dave] #2508262
06/14/18 07:21 AM
06/14/18 07:21 AM
Joined: Jan 2003
Posts: 6,389
nielsville, minn.
Q
quickd100 Offline
master
quickd100  Offline
master
Q

Joined: Jan 2003
Posts: 6,389
nielsville, minn.
As Jeff
Mentioned, more cubic inches need more pan volume not taken up by oil.

Re: High performance engines and pcv systems [Re: mopar dave] #2508268
06/14/18 08:18 AM
06/14/18 08:18 AM
Joined: Nov 2010
Posts: 3,696
jersey
S
Spaceman Spiff Offline
master
Spaceman Spiff  Offline
master
S

Joined: Nov 2010
Posts: 3,696
jersey


526 cubes of angry wedge, pushbutton shifted, 9 passenger killer!
Re: High performance engines and pcv systems [Re: Spaceman Spiff] #2508291
06/14/18 10:07 AM
06/14/18 10:07 AM
Joined: Jan 2007
Posts: 8,027
Mt Morris Michigan
mopar dave Offline OP
master
mopar dave  Offline OP
master

Joined: Jan 2007
Posts: 8,027
Mt Morris Michigan
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.
Re: High performance engines and pcv systems [Re: mopar dave] #2508297
06/14/18 10:22 AM
06/14/18 10:22 AM
Joined: Jan 2003
Posts: 13,319
Marion, South Carolina [><]
an8sec70cuda Offline
I Live Here
an8sec70cuda  Offline
I Live Here

Joined: Jan 2003
Posts: 13,319
Marion, South Carolina [><]
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.

new 440.jpeg

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
Re: High performance engines and pcv systems [Re: mopar dave] #2508313
06/14/18 10:43 AM
06/14/18 10:43 AM
Joined: Oct 2003
Posts: 11,678
W. Kentucky
justinp61 Offline
I Live Here
justinp61  Offline
I Live Here

Joined: Oct 2003
Posts: 11,678
W. Kentucky
Dave, do you valve covers have baffles in them? My small block Indy covers only had a breather in each one with no provision for a pcv valve. I drilled a hole for a pvc valve and welded in baffles in each one then plugged the breather on the pvc side. It's turned 7200 several times and never blew any oil out or had any in the pcv hose.

When it was on the dyno it picked up 3 hp with the pcv valve hooked up on back to back pulls.

Re: High performance engines and pcv systems [Re: mopar dave] #2508325
06/14/18 11:06 AM
06/14/18 11:06 AM
Joined: Jan 2003
Posts: 25,851
United Socialist States of Ame...
T
tboomer Offline
Too Many Posts
tboomer  Offline
Too Many Posts
T

Joined: Jan 2003
Posts: 25,851
United Socialist States of Ame...
Originally Posted By mopar dave
Maybe thats part of my problem. 8qts in a 7qt pan.


Dave..8 quarts of oil in a 7 quart pan? Isn't that creating problems? Just curious here... work

Re: High performance engines and pcv systems [Re: mopar dave] #2508370
06/14/18 01:31 PM
06/14/18 01:31 PM
Joined: Jul 2004
Posts: 19,317
State of confusion
T
Thumperdart Offline
I Live Here
Thumperdart  Offline
I Live Here
T

Joined: Jul 2004
Posts: 19,317
State of confusion
Originally Posted By mopar dave
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............ thumbs 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.....
Re: High performance engines and pcv systems [Re: tboomer] #2508445
06/14/18 03:43 PM
06/14/18 03:43 PM
Joined: Jan 2007
Posts: 8,027
Mt Morris Michigan
mopar dave Offline OP
master
mopar dave  Offline OP
master

Joined: Jan 2007
Posts: 8,027
Mt Morris Michigan
Yes. I thought it was a 8qt pan when i filled it. My mistake

Re: High performance engines and pcv systems [Re: justinp61] #2508446
06/14/18 03:44 PM
06/14/18 03:44 PM
Joined: Jan 2007
Posts: 8,027
Mt Morris Michigan
mopar dave Offline OP
master
mopar dave  Offline OP
master

Joined: Jan 2007
Posts: 8,027
Mt Morris Michigan
Yes i do have baffles and im about to add the rubber ones as well. Good to have options. Thanks

Re: High performance engines and pcv systems [Re: justinp61] #2508451
06/14/18 03:47 PM
06/14/18 03:47 PM
Joined: Jan 2007
Posts: 8,027
Mt Morris Michigan
mopar dave Offline OP
master
mopar dave  Offline OP
master

Joined: Jan 2007
Posts: 8,027
Mt Morris Michigan
What style breathers you using?

Re: High performance engines and pcv systems [Re: Thumperdart] #2508455
06/14/18 03:57 PM
06/14/18 03:57 PM
Joined: Jan 2007
Posts: 8,027
Mt Morris Michigan
mopar dave Offline OP
master
mopar dave  Offline OP
master

Joined: Jan 2007
Posts: 8,027
Mt Morris Michigan
I remember. Im also looking at running pvc on one side and double elevated breathers side by side on the other cover. Plenty of flow thru with that too. See if i can post a pic later.

Re: High performance engines and pcv systems [Re: mopar dave] #2508473
06/14/18 04:55 PM
06/14/18 04:55 PM
Joined: Oct 2003
Posts: 11,678
W. Kentucky
justinp61 Offline
I Live Here
justinp61  Offline
I Live Here

Joined: Oct 2003
Posts: 11,678
W. Kentucky
Originally Posted By mopar dave
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.

Page 1 of 3 1 2 3






Powered by UBB.threads™ PHP Forum Software 7.7.1