OK, well we all know that the EGR is something the computer is completely blind to us disabling to better our air flow and keep our intake manifolds from getting caked, but has anyone else tried rerouting the PCV??? I had mine, for a short time, on just a hose running down to just under the firewall (after all the big guys get away with it all the time) and plugged the PCV inlet on the elbow from the filter and it is a very impressive gain not only in power, but cooler operating temps, lower IATs/EGTs and has to be good for the engine right? But i need a better place to reroute the line, the smoke coming under the hood at idle was just not good for my cool points, and my wife told me to 'fix it'. I've heard of a guy who ran a garden hose to the tail pipe and let it exit there, but I'm not sure thats the route I want to go either. Does anyone on here have any other ideas where to get rid of this hot/expended/oil filled blow-by??? Maybe dump it before the air filter and let it constantly oil up my K&N??? Edited by: Texas Diesel Guy

Racers use to channel it thru the exhaust as a poor man's evac system. Still see it on some mud boggers. System will actually pull a vacuum. Need open exhaust for that. Any restriction and it won't work well. Lots of boaters use a vent system from Racor to keep the engine room clean. You know Racor I'm sure. From what I am told they work good.

Morroso and Mr. Gasket offer the EVAC system, but to be effective the outlet must be in venturi or restricted cross section where a vacuum might occur. To do it otherwise would just be blowing smoke with no negative crankcase pressure.

When I run the supercooler on the '93 it condenses the oil right out of the intake air.
I figured the next logical step was to return it to the crankcase for lubrication.

If I were to reroute it I wouldn't want it adding to my ehaust emmissions.
The only thing that comes to mind is to burn it in an "afterburner".
If you've ever looked at a homemade turbojet, that's close.Edited by: quantum mechanic

What? Now we need a PCV cooler with a catch tray? A beer cooler sounds like a better project.Problem I have with mine is keeping it full. Need an auto-loader I guess.

Well, what does that CDR (PCV valve) really buy you anyway? I understand it keeps your oil fill from smoking like a smoke stack and blow by, but is that the only thing it does? Does it need a vacuum source (turbo inlet) to work best, or can it just be vented atomspherically and work well. You aren't going to run into any problems with the engine with re-routing it?

all engines have some amount of blow by, and if the crankcase were completely sealed the pressure would build and blow seals, most likely dipsticks and valve cover gaskets. PCV does just what it say, Vents Positive Crankcase pressure to keep it very close to atmospheric pressure so you dont blow your seals out and create a leak. As I mentioned earlier, a lot of the semis run with just a PCV valve and a hose running toward the ground, dumping pressure there. Works OK for them, but I think we can all agree these 6.5s generate a great deal of volume of air in blow by, mostly because of the high compression ratio.


I have a possible solution that I think I'm going to try on mine, I'm going to buy a breather filter and try and fix it to my filler neck in place of the filler cap. This will let some pressure leak out at idle so it doesnt all get sucked in to the turbo/motor, and should let air in and through the crankcase to the turbo when under load. This should increase my effective air filter media (very slightly) making it easier for the turbo to get air. Although I realize this will be causing a higher overall volume of air to be going in to the engine from the PCV, I'm hoping that cool outside air drawn into through the breather will maintain or even lower current IATs. I'll let yall know...Edited by: Texas Diesel Guy

TDG,
I have one of those breather filters and it fit the oil cap spot.
my dad's trying it out on his '96 L65.
http://www.dieselplace.com/forum/uploads/B1F_breather1.jpg

Beat me to the punch, so how long have you had it? does it make any difference?? Where did you get it and what is it supposed to fit on? Edited by: Texas Diesel Guy

TDG,
That's an aftermarket breathercap. It should be on the shelf at autozone or o'riely as an aftermarket performnce part ( It's with the edlebrock manifolds and chrome stuff.
I didn't think to try it till I read your post.
Always ready for a test run.
My dad says it didn't hurt performance any.

Alright well it was my idea but I guess I'm following in suit now...


http://www.dieselplace.com/forum/uploads/C36_edelbrock.jpg

Tell me what you think of it. My dad says his truck is to the point that he has to be careful of the fuel pedal least he push it too much at once, it might get away from him.
I didn't do his optical because I have to have another software install and an OBDII cable to read it.
he has the 7' of extension on his same as mine and a #1 fuel resistor that I might switch for a #7 for awhile.

I noticed that at idle it vented vapor out and under acceleration it sucked air in.
i put on on the '94 also so I can test it too.Edited by: quantum mechanic

OK, so I tried it, and well it was great for a while, but I'm pretty sure IAT's were really getting up there as power was very diminished with the hot spell we had here and engine temps were climbing. Solution, a second breater in place of the PCV valve and plug the inlet in front of the turbo, results : mo power, mo cooler, mo betta. So now I'm running dual Edelbrock breathers and no PCV so theres no dirty hot air going in the engine and nothing but lots of horsies coming out, love it.

I got the '94 going again. I've plugged the hole and have two breathers going.
I'm going to drive around with the scantool and see what IAT's look like.

The readings I was getting from the tool are subjective I'm sure but here goes.
at startup I had 98. 3 deg. F
engine warm 123.1 deg. F
acceleration w/ 10K 175 deg. F (peak)
going 65 w/ 10K 160 deg. F
acceleration 20K 200 deg F (peak)
going 65 w/ 20K 160 deg F

I can really see the heat build when I accelerate hard.

I did my second breather a little different than your TDG.
I have the breather with the hose attachment. I run the hose around my a/c receiver, a basic oil vapor condensator.
I didn't want to coat my engine with oily combustible material. I recovered about two teaspoons of vapor oil on my little test.
Edited by: quantum mechanic