Vented or Non-Vented Oil Catch Can?
#1
Vented or Non-Vented Oil Catch Can?
I currently have a small 1 pint Jazz Catch Can with a K&N breather filter on top. Lately, its been filling up pretty quickly with watery fluids and am moving up to a larger 1 Quart size. The larger cans don't have breathers on them and I'm wondering if its even necessary.
Can someone please enlighten me on why a breather would be needed on an oil catch can?
Would one w/o a breather NEED to be routed back to the UIM?
Thanks.
This is for an FD running twins.
Can someone please enlighten me on why a breather would be needed on an oil catch can?
Would one w/o a breather NEED to be routed back to the UIM?
Thanks.
This is for an FD running twins.
#2
Mr. Links
iTrader: (1)
You'll want to release some of the crankcase pressure somehow. So you can either keep the line going to the UIM, or you can vent the catch tank (whether that's with a filter or plumbing it back to the primary intake elbow). I haven't installed mine, but I'll be running the outlet back to the primary intake elbow.
#3
www.lms-efi.com
iTrader: (27)
You'll want to release some of the crankcase pressure somehow. So you can either keep the line going to the UIM, or you can vent the catch tank (whether that's with a filter or plumbing it back to the primary intake elbow). I haven't installed mine, but I'll be running the outlet back to the primary intake elbow.
+1
#4
Lives on the Forum
iTrader: (9)
I've got mine plumbed to the primary turbo so that it's constantly under suction. I'm pretty sure if you ru it just to the UIM, the boost with push back the wrong way.
My can is big enough, and the two inlets are positioned such that that no oil actually get's sucked into the turbo.
My can is big enough, and the two inlets are positioned such that that no oil actually get's sucked into the turbo.
#5
Hmmm...
I just have a tube coming from the filler neck to the catch can. It's basically the old Crispy style setup that has been on the car since the previous owner. The UIM nipple is capped off right now.
Another question:
Which larger sized catch can are you guys using?
I'm looking around and don't see many options that are easy to install in my cramped engine bay running the twins and all the accessories.
Thanks.
I just have a tube coming from the filler neck to the catch can. It's basically the old Crispy style setup that has been on the car since the previous owner. The UIM nipple is capped off right now.
Another question:
Which larger sized catch can are you guys using?
I'm looking around and don't see many options that are easy to install in my cramped engine bay running the twins and all the accessories.
Thanks.
#6
Mr. Links
iTrader: (1)
I will be using the Greddy catch can (when I get around to installing it).
http://mahjik.homestead.com/files/FD...eddy_parts.jpg
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#9
ArmitageFD3S
iTrader: (13)
I had the Gotham racing catch can and I couldn't for the life of me figure out where I was going to fit it in my cramped engine bay either... So I sold it.
Then I replaced my '93 filler neck with the RE-Speed baffled one, blocked off the breather line to the UIM, and figured that'd be that. The very next time I took the car out to an autox, not even a track event, under hard right cornering at near redline, oil particles started spewing out my BOV whenever I got off boost just like before. So now I guess it's time to reconsider that catch can. That or I've got residual oil built up in my I/C and it's coming out.
Sorry for the rant. I know it wasn't helpful at all, but I had to get that off my chest.
Then I replaced my '93 filler neck with the RE-Speed baffled one, blocked off the breather line to the UIM, and figured that'd be that. The very next time I took the car out to an autox, not even a track event, under hard right cornering at near redline, oil particles started spewing out my BOV whenever I got off boost just like before. So now I guess it's time to reconsider that catch can. That or I've got residual oil built up in my I/C and it's coming out.
Sorry for the rant. I know it wasn't helpful at all, but I had to get that off my chest.
#11
Lives on the Forum
iTrader: (9)
I put together a catch can made from a bicycle water bottle and bike mount. It's got one line going to what was the center drinking spout to the oil cap, and another line coming off the cap that goes to the turbo inlet. It's WAY better than the GReddy I tried, because the GReddy requires that you dissassemble the whole bloody thing to empty it. I was filling it ever run.
I fill the water bottle ever run too (similar capacity), but all I do is lift it out of the mount, unscrew the bottle, dump, replace.
I fill the water bottle ever run too (similar capacity), but all I do is lift it out of the mount, unscrew the bottle, dump, replace.
#12
Searching for 10th's
iTrader: (11)
I put together a catch can made from a bicycle water bottle and bike mount. It's got one line going to what was the center drinking spout to the oil cap, and another line coming off the cap that goes to the turbo inlet. It's WAY better than the GReddy I tried, because the GReddy requires that you dissassemble the whole bloody thing to empty it. I was filling it ever run.
I fill the water bottle ever run too (similar capacity), but all I do is lift it out of the mount, unscrew the bottle, dump, replace.
I fill the water bottle ever run too (similar capacity), but all I do is lift it out of the mount, unscrew the bottle, dump, replace.
Can you post a picture of that setup?
#18
Found your pic you were talking about.
https://www.rx7club.com/showpost.php...65&postcount=3
https://www.rx7club.com/showpost.php...65&postcount=3
Last edited by gracer7-rx7; 02-14-08 at 01:40 PM.
#19
Rotary Enthusiast
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Join Date: Sep 2002
Location: FL
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I bought a JM Fab vent catch can listed here
http://www.maperformance.com/store/p...at=1368&page=1
Does anybody have a diagram of where this should be routed? I'm not really sure how to hook this up. I will be running a single turbo.
http://www.maperformance.com/store/p...at=1368&page=1
Does anybody have a diagram of where this should be routed? I'm not really sure how to hook this up. I will be running a single turbo.
#20
Rotary Freak
iTrader: (12)
How did this unit workout for you?.
I bought a JM Fab vent catch can listed here
http://www.maperformance.com/store/p...at=1368&page=1
Does anybody have a diagram of where this should be routed? I'm not really sure how to hook this up. I will be running a single turbo.
http://www.maperformance.com/store/p...at=1368&page=1
Does anybody have a diagram of where this should be routed? I'm not really sure how to hook this up. I will be running a single turbo.
#21
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Join Date: Jul 2003
Location: Edmonton, AB, Canada
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I have a hand built aluminum box sitting above the oil filler with AN-12 hose into the filler. The vent tube goes into the side of the can and it has a small breather to atmosphere on the front. While oil still gets pushed up in hard right hand corners it quickly drains back down once I straighten out. I used to fill two quart oil cans in about ten minutes before I built the drain back box. Now, no issues. I have a screw in AN 16 fitting the top of the box for adding oil to the engine.
-Trent
-Trent
#22
I have a hand built aluminum box sitting above the oil filler with AN-12 hose into the filler. The vent tube goes into the side of the can and it has a small breather to atmosphere on the front. While oil still gets pushed up in hard right hand corners it quickly drains back down once I straighten out. I used to fill two quart oil cans in about ten minutes before I built the drain back box. Now, no issues. I have a screw in AN 16 fitting the top of the box for adding oil to the engine.
-Trent
-Trent
Sounds cool. Post up some pics. I'd love to see this.
#23
Searching for 10th's
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I'm getting one of these:
https://www.rx7club.com/attachment.p...7&d=1203618024
From this thread:
https://www.rx7club.com/showpost.php...&postcount=708
It fits in the area formerly occupied by a vacuum chamber.
afgmoto1978 is fitting a vmount setup in my car, and I'm getting the custom catch tank as well. Oil will be routed back to the crankcase.
It's a pretty cool piece of fab work.
https://www.rx7club.com/attachment.p...7&d=1203618024
From this thread:
https://www.rx7club.com/showpost.php...&postcount=708
It fits in the area formerly occupied by a vacuum chamber.
afgmoto1978 is fitting a vmount setup in my car, and I'm getting the custom catch tank as well. Oil will be routed back to the crankcase.
It's a pretty cool piece of fab work.