Anyone catching stuff in their's?
I have read several posts where nothing is being caught in the can, but residue on pipes and sensors has still been eliminated! Some have speculated that the vapors are being condensed in the tubes..especially LONGER TUBES of MPX set up.

So I have 3 options for accumulation. Basically: (1) in the can...(2)Somewhere (hoses?)...3) No Accumulation at all..not working.

PLEASE NOTE!!
THIS IS FOR TC CARS ONLY. ANYONE MAY MAY POST, BUT ONLY TC'S MAY VOTE ON THIS!

 

hmmm...

 

i have no catch can and have never seen a drop of oil in the charge pipes, intake or on sensors

 

I had about 1/2 oz in the intake pipes after 60k miles of flogging. No can.

 

Pretty good...does that include charge pipes/sensors and IC too ?
Thing is, you're not not be seeing the vapor deposits that are burned onto the back of the intake valves. That's one of the primary reasons I want one in there...to at least reduce those.

 

subd

 

Oh, I saw those when I had the intake mani off, it wasn't from the intake piping though. I used zero oil every 5k miles. I scrubbed them off the stems with solvent and a stiff brush. The buildup on the valve stems is from blowback from the cylinders. Even those with catchcans have that on a DI engine as the intake valves never see any raw fuel to clean them, but you know that already.

None in the IC, lower cp or on any sensors as I had all that apart when it went stock for the sale.

 

ill post it in ur thread too

 

Well I guess that says a lot about how well the pcv system works in this car. You mentioned blowback (AKA BLOW BY)...well some of that will also get sent back into the PCV system and intake. If you can vent that blowback with a catch can set up, it should reduce the valve exposure. Certainly can't hurt to use one in our application and we are getting some reports of less deposition on sensors and pipes using one. I wanted to take this poll to shed more light on this.

From Perrin web site..lots of info here too:
Perrin Performance - Oil Catch Can / Overflow Tank

Blow by mentioned....

Why do I need an Oil Catch Can?
Lets look at your engine for a moment. Every engine during the normal combustion process, has blow-by. Engine Blow-by is excess combustion gases that leak by the piston rings and escape into the engine crankcase. During each compression or power stroke of a normal engine cycle, a very small amount of gases leak by the piston rings. This happens because the piston rings do not create a perfect seal. This Blow-by of gases is very small, but the higher the RPM and the more pistons, the more the blow-by starts to create pressure in the crank.

This pressure needs to be released, and is done so by crank case vents. Because manufactures have to keep environmental issues in mind, these gases can’t just be vented to atmosphere. So the OEM’s vent these gases back to the intake system to be re-burned. This all sounds good, but Blow by is nasty stuff!

Engine blow-by contains gases and oil from the crankcase. The gases aren’t really a problem, but the oil is. This oily mess coats everything in its path as it makes it way back to the combustion chamber. This nasty oil mess gets into the turbo, then boost tubes,then intercooler, into the intake manifold, and finally back into the engine. As the oil creeps in between couplers and boost tubes, it can cause the connection pop off under boost. This oil then gets into the intercooler, coating all the cooling fins. This greatly effects the ability of the intercooler to cool, and the efficiency of it will drop! This will cause a huge loss in power and can cause detonation. The last place this oily mess sees before the combustion chamber is the intake valves. Because of the temp differences and the oil impacting them, the oil will start to build up and form sludge. This adds up over time, and can cause many other problems, and hurt performance.

From this you can see, blow-by is bad, and it needs to be dealt with

 

I wasn't talking about ring blow by ronn.

 

Gotcha.
You're talking valve blow by? Anyway...isn't *blow by blow by*? Any blow by is going to go back through PCV..correct?

 

No, just crankcase blowby does. Positive Crankcase Ventilation.

Exhaust valve leakage goes out... the exhaust, intake blow back ends up in the intake mani and sucked in to the next valve that opens...or deposits on the stem, ect. Intake valve leakage, turbulence from the intake/exhaust valve overlap & resulting scavaging, or lack of it, all come into play with the intake stem deposits. If you are getting it from turbo seal leaks, the Upper CP & IC would be loaded. If the rings have a good seal the PCV won't see much.

A catch can is a good idea if you need one. I just didn't.

 

Yeah..I know you had a pretty aggresive set up too. That's what's really surprising. I haven't had a chance to peek in anywhere, but figure it's insurance.
Thanks for feedback.

 

Moderate boost from the time I drove it off the lot to 200 miles. Ridden hard from 200 miles on the odo on and put up wet.
Best way to seat the rings IMO. YMMV.

 

No oil or anything in catch can, but haven't blown a map sensor since i put it on so its doing something right

 

My mpx can has been on for a year now. I noticed no oil accumulation anywhere when I installed it and my charge piping. At this point, the can is still empty.

 

i had some oil on my MAP sensor that caused reduced boost pressure and my car ran like crap.

i was wondering if it was PCV oil or the valve blow back. im making my catch can just in case.

 

Thanks..but this is for TCs only (LNF). You prolly didn't need one..turbos have more blow by under boost. If you voted *N0* please post that here..it doesn't *count* and I will adjust that when I tally results.

EDITED:
Sorry..I see you have a TC..I wasn't looking at your SIG!

 

i get alot in the winter, but nothing really in the summer

 

Where do you put the hose for a catch can? I really don't know anything about them or how they work. I wonder if thats why i get a lil smoke out the exhaust sometimes when i'm in boost?

 

Thanks..I edited my post.

 

common now..SEARCH here!
Here's a hint:
Two from can go here..to Turbo outlet and Valve cover outlet:



Here's MPX can and hoses going to it (from locations shown above) with stock air box set up:

 

Thanks ronn!

 

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