19Nova72
Nov 9th, 04, 12:11 PM
I just figured out why my car smokes when I get on it is because the PCV has no baffle, so when the rpm's are up oil splash's all over it and gets sucked into the carb. I have decided that a pcv is just a vaccum leak that sucks in warm, dirty air, so currently I don't have it hooked up. I was thinking I could do like race cars do and use my exhaust to suck out the crankcase. See anything wrong with this for a dialy driver? Only concern of mine would be noise coming back up the tubes.
Wolfplace
Nov 9th, 04, 12:53 PM
Evac systems don't work with full exahust systems.
Put a baffle in the valve cover, it's no big deal with a piece of aluminium & some epoxy.
chevydog66
Nov 9th, 04, 8:40 PM
EVAC systems also pull a lot of moisture into your oil, I've heard. I just use 2 breathers on mine. I have Dart aluminum valve covers and I had a local welding shop weld a splash guard on the inside of my valve covers. If you were to fold about 1/4" of both ends of a business card that is what I had welded under my breather holes on the inside of the valve cover. It is 1/8" thick aluminum, of course.
19Nova72
Nov 9th, 04, 9:05 PM
Is that cuase you build pressure in a full exhaust rather than pull a vaccum? So what makes more power, no PCV or a PCV? Hmm thats strange, when I have the PCV hooked up and I stuff the throttle it smokes, but you would think at WOT there isn't enough vaccum for the pcv to work. Strange. I did notice I can bump up my vaccum advance a bit without the PCV because the mixture is richer without it which makes it harder to ping.
iwantachevelle
Nov 9th, 04, 9:14 PM
At wot you have little vac., but the most blow by, you may have a ring problem blowing oil though the pcv.
Roadknee
Nov 9th, 04, 9:57 PM
With no valve cover baffles some oil can actually pool in the bottom of the manifold. This will get pulled into the cylinders under WOT and cause plenty of smoke. My old 327 did this.
Schurkey
Nov 10th, 04, 12:03 AM
The PCV system was the finest bit of emission control engineering ever devised. Three bucks buys you 80% reduction in total emissions, and there's basically no downside unless you go out of your way to screw up the system.
Put a baffle in the valve cover, call it a mechanical engineering thesis project.