In case anyone was still in denial, here's a shot of what came out of my Elite catch can after 3000 miles: Keep in mind this is a Ziploc brand sandwich bag, I would guess there to be at least a quarter cup of oil in there: Shot of my Elite can installed:
What have you changed recently? Six weeks ago you were only getting between 1 and 1 1/2 tablespoons every 3k miles.
Wowza, thats a bunch of oil. Looking at possibly getting wifey a GCSRT8 - is that the stock intake manifold? Looks covered with something? DJ
the manifold is thermalcoated if i am not mistaken...... the catch can is a must with these motors imo......
That amount of oil in 3,000 miles is equal to one 2,647th of one 1,000th of one gram for every combustion.
I switched to Motorcraft synthetic 5w-50 instead of Mobil 1 0w-40, other than that, nothing. I beat the snot out of my Jeep (never until it's warm) but I also maintain and take care of it. Trying to figure it out myself.
GotStroke, Do you think I'll get as much in my catch can with an airhammer as my old mopar cai? Wasn't sure if add'l flow would induce more oil like yours. Not sure what CAI you have, tough to tell in the pictures.
This might be better off in it's own topic but as long as we're talking catch cans..... I emptied mine (BT) for the second time on Friday. Even though it seems like I had put on a lot more miles and two trips to the track, it had the same amount of oil in it as the first time, about 1/3 full. This peaked my interest as to whether it catches less oil (or stops completely) as the reservior gets fuller. Has anyone had their can really full? I have no reason to think it's not working perfectly. Just one of those wacky physics things might be at work. I'm tempted to fill it up 1/3 with water and run it for awhile and make sure oil is still getting trapped.
No. If there was any difference it would be immeasurably small. I have a BWoody CAI and will be testing a Thorhammer in the near future.
My Elite can (should have taken a pic of it full) was filled to about 1.25-1.5" from the top portion of the bottom of the can.
The catchcan (and PCV system) is picking up liquid vapors. Most of this is coming off the oil in the pan as it gets hot. More intake flow, more power, may result in more combustion blow-by but that's pretty "dry" gas and solid particulates. You wouldn't expect this to end up as liquid vapors that would condense coming out of the crankcase. (Blow-by will turn your oil black though.) I don't think you could measure the difference the resevoir level might make in the amount the catch can catches. If the vapors circulate through the reservoir then as the reservoir fills the air/gas/vapors going through there would spend a minutely less amount of time passing through there. Theoretically, more condensation would occur the longer the vapor is in there... Seeing as the overwhelming amount of condensation takes place as the vapors pass over the much greater surface area of the mesh/screen/stainless steel wool it's not going to make a difference. I forget, but vacuum though the pcv system is limited at 13? lbs. I'd say the largest effect on what you catch will be the temp your oil reaches and how often.
