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 Post subject: catch can setups
PostPosted: Wed Sep 10, 2008 6:23 pm 
First Gear
Joined: Mon Sep 24, 2007 6:21 am
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Location: Winnipeg, Manitoba, Canada
would either of these be good?

is one better?

alternate routing?

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PostPosted: Wed Sep 10, 2008 9:14 pm 
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You should use the first one.

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PostPosted: Thu Sep 11, 2008 1:25 am 
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Location: Winnipeg, Manitoba, Canada
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think this would work ok. 60 bucks from weapon r from the local speed shop. i think im gonna get it..

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PostPosted: Thu Sep 11, 2008 2:32 am 
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In my own personal experience, those don't work good at all. I had one like that, and a GReddy catch can (the old square one) and neither worked well at all. They would catch some oil vapors, but they didn't pull the water out like they should.

If you're going to buy a catch can, make it a one-time purchase. Believe me, even though these cost more, they're worth it.

http://www.eliteengineeringusa.com/Catch_Can.html

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PostPosted: Thu Sep 11, 2008 4:32 am 
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i agree that design would work better, but i am not going to pay that much.

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PostPosted: Thu Sep 11, 2008 9:17 pm 
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there are a few different ones out there that employ the same design and are around $100. It would be worthwhile to spend a bit more on something that actually works is all im trying to say.

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PostPosted: Thu Sep 11, 2008 9:39 pm 
Fifth Gear
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Be careful in the winter though. If you make a bunch of short trips they can ice up, blocking the ports in the catch can, and causing your motor to build pressure in the crankcase.


This happened to me, and my turbo spit out a quart of oil between the two ends of it. Its a BB Garrett, so it is still fine, but journal bearing turbos don't appreciate that so much. I also had a ton of fun cleaning all that oil out of my intercooler and charge piping. Thank goodness I didn't blow out any of my cam or crank seals. I might have been a little more upset.



I suggest you take off any catch can in the winter, so it doesn't turn your car into a smoke machine. It has happened to a few people I know. Its only an issue when you get down to the sub zero temps or below. The day it happened to me we had a high of 2°

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PostPosted: Fri Sep 12, 2008 2:22 am 
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I can say I haven't been impressed with the greddy one. I'll probably try to add some baffles and or some steel wool in there.

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PostPosted: Fri Sep 12, 2008 3:32 am 
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I wouldn't use steel wool unless it was stainless. I was thinking about using some of those copper scrubbies you find in the cleaning section at the grocery store.

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PostPosted: Fri Sep 12, 2008 7:05 pm 
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Yeah that's true....SS or copper.

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PostPosted: Sat Sep 13, 2008 2:57 am 
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What do the aftermarket ones usually run inside as a filtration unit? I read in Import Tuner recently that they actually gained 2 hp on an RX-7 by installing a oil catch can.

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PostPosted: Sat Sep 13, 2008 12:13 pm 
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The typical ones you see for sale everywhere are just an empty can. No baffles, no filtration, so it's basically whatever gets caught in there might stay, or it may get sucked right through to the intake like it normally would have.

2hp gain on an RX7 by putting a catch can on? that's bs. 2hp is well within any dyno's error range, so they could have seen a 2hp gain by waiting 5min and running the car again with no mods at all.

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PostPosted: Sat Sep 13, 2008 12:40 pm 
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supra90turbo wrote:
so they could have seen a 2hp gain by waiting 5min and running the car again with no mods at all.
Nope, they did a month long trial & test. It was catch can vs. open air breather with a mini K&N style filter vs. OEM breather system.

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'92 LSS "Trixie" - TD04, '06 WRX TMIC, Invidia D/P & TXS U/P, 3" APEX'i CBE, custom intake, TXS MBC & BPV
Perrin LCP, WRX & H6 brakes, S/S lines, Cusco H-brace & RSTB, AGX's, Progress springs, SimplySubie fender braces


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PostPosted: Sun Sep 14, 2008 1:59 am 
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But, my point being 2hp is well within any dyno's error range, so whether it was 2 hours later or 2 weeks later, it still doesn't mean crap. You can gain 2hp by driving 10 miles to a different altitude or a different temperature.

2hp isn't worth mentioning as a "gain". That's all I'm saying.

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PostPosted: Thu Sep 18, 2008 6:18 am 
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supra90turbo wrote:
But, my point being 2hp is well within any dyno's error range, so whether it was 2 hours later or 2 weeks later, it still doesn't mean crap. You can gain 2hp by driving 10 miles to a different altitude or a different temperature.

2hp isn't worth mentioning as a "gain". That's all I'm saying.


I agree. There's no way you gained power with a catch can.

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PostPosted: Thu Sep 18, 2008 7:50 pm 
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All catch cans suck.
All of them.

This on the other hand does NOT suck
http://www.mann-hummel.com/group/upload ... UCmOK5.pdf

I bet you'll gain some horsepower once the atomized oil has been removed.

Originally designed for large diesel trucks, so its quite large
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PostPosted: Thu Sep 18, 2008 8:19 pm 
Fourth Gear
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Ok, and where do you buy one in the US and how much?

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'92 LSS "Trixie" - TD04, '06 WRX TMIC, Invidia D/P & TXS U/P, 3" APEX'i CBE, custom intake, TXS MBC & BPV
Perrin LCP, WRX & H6 brakes, S/S lines, Cusco H-brace & RSTB, AGX's, Progress springs, SimplySubie fender braces


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PostPosted: Thu Sep 18, 2008 8:25 pm 
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Lots of places sell it. In fact the famous corvette tuner Lingenfelter resells it under their own name http://www.lingenfelter.com/Merchant2/m ... gory_Code=

There are better places to get it though. Look to pay between 100-200 new.

I heard about it in the built motor discussion section on Nasioc. Its probably the ONLY place on Nasioc not filled with idiots.


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PostPosted: Thu Sep 18, 2008 8:26 pm 
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ciper wrote:
I heard about it in the built motor discussion section on Nasioc. Its probably the ONLY place on Nasioc not filled with idiots.

Oh, how true! Thanks for the info!

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'92 LSS "Trixie" - TD04, '06 WRX TMIC, Invidia D/P & TXS U/P, 3" APEX'i CBE, custom intake, TXS MBC & BPV
Perrin LCP, WRX & H6 brakes, S/S lines, Cusco H-brace & RSTB, AGX's, Progress springs, SimplySubie fender braces


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PostPosted: Mon Sep 22, 2008 5:12 am 
Fifth Gear
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When I did have a catch can on my car it ended up with some stuff in there that definitely was not oil. It was rather nasty stuff too.

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PostPosted: Mon Sep 22, 2008 6:56 am 
First Gear
Joined: Wed Jul 02, 2008 10:35 pm
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Your buying a catch can because it looks cool, admit it.


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PostPosted: Mon Sep 22, 2008 5:01 pm 
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lol, not at all. I'd prefer to not have one, actually. The less clutter I have in the engine bay the better imho.

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PostPosted: Mon Sep 22, 2008 5:04 pm 
Fourth Gear
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They do serve a purpose and can only have positive attributes.

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'92 LSS "Trixie" - TD04, '06 WRX TMIC, Invidia D/P & TXS U/P, 3" APEX'i CBE, custom intake, TXS MBC & BPV
Perrin LCP, WRX & H6 brakes, S/S lines, Cusco H-brace & RSTB, AGX's, Progress springs, SimplySubie fender braces


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PostPosted: Mon Sep 22, 2008 6:46 pm 
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Could the HP gain come from the fact that oil isn't being sent through the intake and into the engine? Burning the oil would lower your octane rating and IC efficiency. Maybe enough for 2HP?

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PostPosted: Mon Sep 22, 2008 10:29 pm 
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n2x4 wrote:
Burning the oil would lower your octane rating and IC efficiency.


I agree with this.


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