Intercooler and CDR hose

[jhenegh]

On factory turbo trucks, the CDR hose just plumbs into the intake pre-turbo. With the (possible) addition of an intercooler on my truck, does that need to change? I feel like oil will eventually fill up the intercooler if I still plumb in in pre turbo and let the turbo blow that air through all the pipes. What are the other options?

Thanks

 

[Agnem]

You are correct. And that IS what happens to a lot of trucks, even factory intercooler setups. The oil can end up in the bottom of the intercooler and impact performance. Best option if you don't mind breathing like a dragon a little bit, is a road draft tube.

 

[jhenegh]

I know little about catch cans (or if this is one) but:

If I make a can that is mounted ABOVE the CDR and is fed from the bottom and is filled with a few baffles and some good steel wool, would the oil drain back down with gravity and stay where it is supposed to? So then then outlet hose could just be attached to the air pipe again?

 

[BDCarrillo]

I've seen the aftermath of venting the crankcase into the turbo... Gunk everywhere... Damaged boots (not all of them are oil resistant)... Crud cooked into the intercooler... Goo settled in every pipe...

I tried making a few catch cans for the 6.4 and didn't have much luck. Steel wool, pot scrubbers, air filter media, baffles, nothing worked to catch the oil mist. Off the shelf separators are wayyy too small.

Road draft or plumb it into the exhaust would be my top recommendation.

 

[Greg5OH]

road draft-way too stinky and nasty. into exhaust is best IMO, will always haze a bit. I was lookign into these, Mann oil mist seperators. Can get them for up to 600 brake hp, flows like 1500l/minute (way way way more than even the most worn idi will put out), a little procey aroudn 300 bucks but they are nice units. There is an oil return that will send the condensed oil back into the pan (just have to drill and tap a fitting.) Sorry I forgot the actual name.
As for oil in the intercooler-same thing, drill and put a bung on it, then you can have a petcock drain.
Right now I have a nice looking 4"x10" mist seperator. The crankcase fumes enter into the top, there is a 4" long piece of 1" pipe to avoid it getting drawn thru the outlet without having to go thru this little perforated stainless tube I have in there. No real pics of it. Ive been running it for a week, time to open the drain on the bottom and see what comes out.

 

[IDIoit]

X2 into the exhaust.
i love my set up.
venturied with a 1 way check valve into my DP

 

[jhenegh]

How is this accomplished in other diesel vehicles?

 

[jhenegh]

X2 into the exhaust.
i love my set up.
venturied with a 1 way check valve into my DP

What kind of check valve did you use? Got a link?

 

[BDCarrillo]

How is this accomplished in other diesel vehicles?

Crankcase venting? In all vehicles on the road since the mid 80s it's recirculated into the engine to be (hopefully) combusted. Some have a metal mesh it flows through to coalesce some oil vapor, some are just a simple baffle.

What kind of check valve did you use? Got a link?

Check on summit. It's very common on dragsters.

 

[jhenegh]

http://www.summitracing.com/parts/smp-av7t/overview/

These? Any way to know what they're rated to flow?

 

[IDIoit]

thats the ones.
dont know what they are rated at,
i run these on my boats and now on my 87,
they work great.

 

[TahoeTom]

http://www.oilburners.net/forums/showthread.php?67332-RDT-Into-Exhaust&highlight=
This thread is a good discussion on this topic.