To PCV or not to PCV
#4
Safety Car
the only reason not to run them these days is looks.
in about 3 cars, i have never had a problem with oil burn, rings, and this mysterious "sludge" everyone is so worried about these days. People are worried about water moister as well, i have no idea how it would get in there in the first place.....
#5
Melting Slicks
you dont need them, i have had cars running solid valve covers for years, no problem. Using the old style intake manifold, with the oil fill tube with the breather in the cap, that is all you need.
the only reason not to run them these days is looks.
in about 3 cars, i have never had a problem with oil burn, rings, and this mysterious "sludge" everyone is so worried about these days. People are worried about water moister as well, i have no idea how it would get in there in the first place.....
the only reason not to run them these days is looks.
in about 3 cars, i have never had a problem with oil burn, rings, and this mysterious "sludge" everyone is so worried about these days. People are worried about water moister as well, i have no idea how it would get in there in the first place.....
#6
Team Owner
OK, let's try this.... There is no reason to remove/discard your PCV system if you still have one.
#7
Burning Brakes
unless you live in the Sahara Desert, or Death Valley, moisture goes right through the carb, and out the exhaust....as evidenced by steam in the exhaust...even those two deserts have a relative humidty in the 20's, so water is everywhere....
#8
Team Owner
Get rid of PVC
No real performance motor has PVC. It is just a bad deal for lots of reasons.
Oil mist promotes detonation, back of the valve carbon build up, piston top buildup, lower life of plugs
It's a big variable vacuum leak depending on engine vacuum so correct jetting is never as precise. cylinder to cylinder A/F is always off because of the shot of foul air coming through a big 3/8th hole
Twin breathers at a minimum or crank case vacuum pump.
No real performance motor has PVC. It is just a bad deal for lots of reasons.
Oil mist promotes detonation, back of the valve carbon build up, piston top buildup, lower life of plugs
It's a big variable vacuum leak depending on engine vacuum so correct jetting is never as precise. cylinder to cylinder A/F is always off because of the shot of foul air coming through a big 3/8th hole
Twin breathers at a minimum or crank case vacuum pump.
#9
Race Director
Thread Starter
Get rid of PVC
No real performance motor has PVC. It is just a bad deal for lots of reasons.
Oil mist promotes detonation, back of the valve carbon build up, piston top buildup, lower life of plugs
It's a big variable vacuum leak depending on engine vacuum so correct jetting is never as precise. cylinder to cylinder A/F is always off because of the shot of foul air coming through a big 3/8th hole
Twin breathers at a minimum or crank case vacuum pump.
No real performance motor has PVC. It is just a bad deal for lots of reasons.
Oil mist promotes detonation, back of the valve carbon build up, piston top buildup, lower life of plugs
It's a big variable vacuum leak depending on engine vacuum so correct jetting is never as precise. cylinder to cylinder A/F is always off because of the shot of foul air coming through a big 3/8th hole
Twin breathers at a minimum or crank case vacuum pump.
#10
Team Owner
Don't forget to wash the grime off your engine once a month (minimum) because of the oil mist in the engine compartment.
#11
Race Director
Thread Starter
Maybe I need one of these. An LS1 vacuum pump. The reason I ask this is I'm afraid the PCV valve is creating a vacuum leak and the FI is seeing this as a leak and it is running lean. I am seeing a lean condition under cruise conditions. I am going to try and just plug the port on the throttle body and see if the lean condition goes away.
#13
Race Director
Thread Starter
Don't know yet. I have heard this is quite a popular vacuum pump and has been done before many times. You can plumb it anywhere the engine can vent. I was thinking at the fuel pump area since I have an electric pump now. You could fab up a cover with a breather tube. This also keeps the top of the engine clean looking. I don't know where the output goes but I can sure find out.
#14
No real performance motor has PVC. It is just a bad deal for lots of reasons.
Oil mist promotes detonation, back of the valve carbon build up, piston top buildup, lower life of plugs
It's a big variable vacuum leak depending on engine vacuum so correct jetting is never as precise. cylinder to cylinder A/F is always off because of the shot of foul air coming through a big 3/8th hole
The great thing about America is you can ask a question and get different answers from different people with different knowledge and experiences and then pick the answer you wanted to get!
#17
Race Director
Breathers on the 1970 LT1
No problems with my Street cars or Race cars. My opinion right or wrong there is zero octane in oil, keep it in the oil pan not recycle it....
This example has been working since 1970...and no oil outside the breathers either. If your blowing oil, the engine is bad, period...
blow the pictures up, no oil...and at different date periods of pictures
This example has been working since 1970...and no oil outside the breathers either. If your blowing oil, the engine is bad, period...
blow the pictures up, no oil...and at different date periods of pictures
Last edited by Ironcross; 04-13-2009 at 09:01 PM. Reason: A few more shots showing zero OIL
#19
Race Director
Most of them, But not All,
LTI, L88, LS6, LS7, L46, L78, L87, LS5 and of course the DZ302, Hemis, 440-6, 428 CJ, 429 SCJ, SD455, Ram Air IV, W30, W31, Stage 1-455 - I could probably list a couple dozen factoy cars that used it - from GM, FORD, MOPAR, AMC, etc. Not to mention a few hundred thousand home built hot rods. And I won't take the time to mention the modern ones being this is a C3 board.t!
Here is my favorite engine in my Cuda and low and behold, No PCV. The 1965 A990 Race Hemi.