Just curious. Does blow-by burn? I always assumed it was exhaust gas squeezing by the rings. I know there is a little oil vapor in it. But a little oil vapor and exhaust gas doesn't seem good compared to fresh air and fuel.

 

Blow-by is a mix of gasses that force past the compression rings at and near peak pressure. Because of the high operating pressures, a diesel in excellent condition has substantial blow-by compared to a gas engine.

Does blow-by burn? Since it is a mix of gasses from near-peak pressure, there is usually a mix of completely burnt fuel (accounts for the soot that ends up in diesel engine oil), partly burned fuel, and perhaps some unburned fuel - combustion isn't quite finished at that point. Due to pressures involved, it gets mixed with engine oil mist, which will also burn, but which you don't necessarily want to burn.

So, if you can filter or condense out all the oil mist, then recycle the remaining gasses, they will burn fine.

Unburned and partially burned fuel hydrocarbons are a big contributor to photochemical smog. I live in smog town, so my desire not to vent CC gasses to the atmosphere is twofold - I don't like the smell, and I don't want to contribute unnecessarily to smog.

"Then don't drive a diesel" Well, properly running diesels don't contribute nearly as much to our type of photochemical smog as gas engines because of the type of combustion products they put out. In other places, diesels may be the primary cause of the type of smog there - but not here. Here it is gas engines.

But blow-by stinks, so I'm looking for a solution. I've designed one on paper and have some of the components. I'm still trying to figure out the best way to make a couple of parts - short of hiring someone to CNC it. After all, the point is to save money.

 

That looks like the Dynatech units they sell. What size hose did you use? One that fits directly into the "dog house" I'm curious because some have had the hose shoved into the 90 degree elbow coming out from the dog house. I have mine hooking into the dog house and going to the rear.

 

I think it's 3/4 inch hose. I am pretty sure it's the dynatech piece as well. At the doghouse there is a 90 degree elbow and the hose runs up for several inches then over the top of the motor and turbo zip tied up to the body sheet metal. Then down to the frame rail and back past the muffler. Mine has quite a bit of blow by. I used to vent it but now I just run it into the exhaust. The open vent was kinda nasty smelling and looked bad having "an extra exhaust pipe." Now you can just barely tell there is a hint of something in the exhaust.

Thanks for the info on the blow by too.

 

So you hooked the hose directly into the hose coming out of the dog house? IOW, you didn't slip it in and it is the same size? Just used a connector?

 

This is how it looks. I am not sure why I had some gaffer's tape on there. It's not needed...

 

OK. I bought the kit with the 90 deg elbow and it looks set up just like yours so it must be good. That way I don't have to change the hose. Thanx

 

If the Racor replacement filter is cheap enough it might be feasible to make you own housing out of some PVC pipe. You would just need a way to get the filter to seal inside the ID of the pipe so the gasses get filtered and not bypassed to the outlet.

Sounds easy enough to me. I'm going to call the Parker salesman we deal with at work and see what I can come up with.......

 

A lot of guys have had success running a hose down to the frame rail into a canister with ScotchBrite in it. Run another hose out of the canister and back into the intake. Install a drain valve in the bottom of the canister and you're done. The ScotchBrite is the "filter" medium. Some guys drain actual oil out. Some guys, well, ever heard the saying "There I sat broken hearted, tried to s**t and only farted." ?

 

I am an Engineer in training I have the ability to make cad models of complex systems and also have the means to get them prototyped. If somone has a really good idea send me some simple drawings and dimensions and I will see what I can do.

In not I plan on using a K&N breather at the end of heater hose back near the rear axel...

Let me know if anone has any I deas you wan to see in 3D
GTABurnout@yahoo.com

 

What process do you have access to to prototype parts?

 

The Racor filter is a great idea - and they charge as though the device is made of platinum. Hell, catalytic converters that CONTAIN platinum don't cost as much as the Racor filter.

 

In house CNC shop I just need to stay after a few days and beg the machinest who I am cool with any ways...

 

Cool, thought it might have been the resin/laser prototyping process. We might have aneed for that coming up at work with some new products we have coming out.

 

What do you guys make/do...