My new crankcase evacuation system

[turboglenn]

Paul, can't wait to see the results. As for nit-picking the effects, remember that if you can have the hole to be scavenged flush with the inside surface so there's no turbulence and just high speed air causing a low pressure zone over it you will be better off. Lots of drag cars (V8's mainly over the years) have scavenged from the headers but they only run a header, we have back pressure building from the muffler and piping so i don't think that route is as effective for us so we use what we got.. I'm about to tig my new intake pipe up (filter to turbo) and it will have a -8 line tapped from a tube that's flush on the inside, and insce i also have an ECU that will allow me to log a second MAP sensor (and even has it built in) if i get motivated i shall do the same tests as paul just to see how it can vary from ones etup to the next and if my flush surface shows any change in effect over Pauls system where the fitting is physically inside the inlet tube

 

[turbobrian]

Finally got to installing the catch can. I haven't pulled the intake pipe to see if there is oil in it but from just the looks of it it works well. I filled the can with oil and hit it with the air compressor and zero oil was pushed through. I have about half as much oil in the can than running to atmosphere, the valve cover is not leaking oil like it did before either. Made about 15 pulls at 30-38 psi on the dyno yesterday. Made 462 on 93 pump gas on Mustang 1100 SE Awd. Id like to add another can for the other -10 on the valve cover.

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[99gst_racer]

Looks great, Brian.

 

[Calan]

Cool deal Brian!

 

[RipperXX]

Looks outstanding as always 99. I think your inspiring a lot of other DSMers on here.

















Any data yet?

 

[turbobrian]

Pulled off the turbo intake today to find zero oil. This set-up works very well. I have 2 off my valve cover and 2 off my intake, so if anyone wants this singe can I will sell it so I can have Calan build me a dual. Even though I don't think dual is necessary for most people I just want to utilize both since my car runs very high boost. Pm me if anyone wants to grab this from me.

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[Ludachris]

Not yet. The car has been down for the past 10 days due to a dampner issue. But, I should have it up and running again by tonight, and I just picked up an input buffer to use to wire up the 3-bar to the Baro input. I'll wire that up tonight as well, so I'll hopefully have some data within the next few days.

Waiting for those results Paul. This will help me determine the setup I'll be going with. So get to it!

 

[99gst_racer]

I did some logging with it last night, but I'm unsure if my 3-bar is working properly. It just isn't responding much at all. It mostly sits at .1 PSI while cruising and bounces between .1 and .3 PSI under heavy load. My spare MAP sensor may be junk, so I'm going to borrow my buddy's 3-bar on Friday and I'll re-test then.


The evac system seems to be working well though. I was pushing oil and crankcase pressure out everywhere last year, and it's completely under control so far this year. My valve cover is no longer an oily mess, and my dipstick is staying put even with 40-45 psi boost.

 

[Calan]

Paul...

Fire up Link and pump some shop air and/or vac into the sensor. That's a quick and easy way to see if it's working.

*****

Those numbers may actually be accurate...but I would expect a little less than that with your setup (ideally below 0 psi). FWIW, mine stays almost flat as well, between 0 and .6 psi.

I still want to hook up an isolated test port, in reference to what we discussed a couple weeks ago about how we are measuring it (the info that I added to the PCV article).

 

[99gst_racer]

Well, my 3-bar tested out fine, so those results are accurate. I'm going to do some more datalogging tomorrow, so I'll post a log tomorrow night.

It's probably also worth noting that I don't currently have an element on my intake pipe. I have a feeling that that could reduce the vacuum in the intake pipe and have less draw on the evac set-up. Might be why I'm not seeing a vaccum on the crankcase.

 

[Calan]

Well now you have a baseline to work with, and the good news is that you apparently have good flow through the CC and no excessive pressure build up, even with a small amount of positive pressure being measured across the filters.

How much oil are you collecting in the can, and how much is getting sucked past the filters and into the turbo inlet? Ideally the answer is "Alot and none".

I'm very interested to see what effect other things have, such as that missing filter, line size, tap orientation, etc.

 

[99gst_racer]

Well now you have a baseline to work with, and the good news is that you apparently have good flow through the CC and no excessive pressure build up, even with a small amount of positive pressure being measured across the filters.

Exactly. I'm happy enough knowing that my crankcase has less than a 1/2 psi even at 40-45 psi boost. That alone is a huge improvement from my previous configuration (which consisted of two 3/8" hoses ran to the ground). I only wish I could have tested the previous set-up to know how bad it was.

How much oil are you collecting in the can, and how much is getting sucked past the filters and into the turbo inlet? Ideally the answer is "Alot and none".

Good questions. I'll check it out sometime this weekend and I'll report back.

 

[Strm Trpr]

Well, my 3-bar tested out fine, so those results are accurate. I'm going to do some more datalogging tomorrow, so I'll post a log tomorrow night.

It's probably also worth noting that I don't currently have an element on my intake pipe. I have a feeling that that could reduce the vacuum in the intake pipe and have less draw on the evac set-up. Might be why I'm not seeing a vaccum on the crankcase.

I bet if you put a filter on the intake pipe you'll probably notice the evac system pulling more vacuum...

 

[99gst_racer]

I did some more datalogging with it on Sunday. I had to play with the elevation setting in Link to get it to zero out. I'm at 650 ft. elevation, but it didn't zero out in atmosphere until I inputed 800 ft.

With normal low-load driving, it bounces between 0 and .2 PSI. Under heavy load, crackcase pressure sits at .2 PSI. It jumps up to .4 PSI from 4900-6300, then back down to .2 PSI and then eventually settles to 0 PSI by 7300+. So far so good.

I'll be checking for traces of oil in the intake pipe and in the catch can later on this week.

 

[99gst_racer]

I pulled the intake pipe off and it's squeeky clean as expected. As is the compressor inlet.
And I drained a little less than a fluid ounce of mixed water/fuel/oil from the can. This tells me that the entire set-up is functioning perfectly.

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[Calan]

Cool deal Paul.

About how many miles was that?

 

[99gst_racer]

I haven't been tracking mileage in the least bit. I'd guess a few hundred hard miles. It's seen 40+ PSI many, many times this year.

 

[Blurred Talon]

Wow, very nice set up Paul. I might have to copy it for my car

Sadly, I decide to do my catch can set up after spending all the money to have it nicely powder coated.

 

[Ludachris]

Good to see the results Paul. So Craig, I guess this is what I'll have to go with as well - sent you a PM.

 

[turbobrian]

Just a quick update on the dual catch can. Made several 1/4 passes as well as 10 or so street pulls. Zero oil in the catch can! Just one drop or water.

I would say this is the best catch can setup I have used so far. I recommend this to everyone.

 

[Calan]

Just a quick update on the dual catch can. Made several 1/4 passes as well as 10 or so street pulls. Zero oil in the catch can! Just one drop or water.

I would say this is the best catch can setup I have used so far. I recommend this to everyone.

Cool deal Brian...

Did you mean no oil in the intake? Have you had a chance to log the CC pressure by any chance?

Thanks for the update!

 

[Ludachris]

Got mine on Friday! Can't wait to put it in... I have a pretty cool mounting point that I think I'm going to try. Something a little different than the typical solutions.

 

[snowborder714]

Can't wait to put it in...

So check back in 2012?

 

[Ludachris]

So check back in 2012?

Right? I actually pulled the turbo off this past weekend. Most work I've done on the car in almost two years!!!! I'm hoping to be in the garage more this fall/winter. We'll see.

 

[turbosax2]

It's cool Chris, we're almost as bad. Got my catch cans back in April and finally had the bracket welded on two days ago. I had Craig send me a 3.6" long piece of his generic mounting bracket (Z extrusion) so I could drill my own holes and have it welded on exactly where I needed. The cans are extremely tight where I mounted them, especially for clearance from the drain to the subframe. Now I just need to polish them up before I can install them. I really wish I had a buffing wheel!

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