high flow cat
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high flow cat
I have a 1993 ss and am wanting to change out the cat due to a nasty rock accident. would a high flow cat benefit me in anyway?
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I'm currently in the market for an aftermarket downpipe. I've been debating between catless or high-flow catted.
Now, I've heard that our cars can pass emissions w/o a cat (with a proper tune), but the token environmentalist in me wonders just how much power a high-flow cat would actually rob.
Anyone know or have experience with catted vs. catless exhaust?
Now, I've heard that our cars can pass emissions w/o a cat (with a proper tune), but the token environmentalist in me wonders just how much power a high-flow cat would actually rob.
Anyone know or have experience with catted vs. catless exhaust?
93 legacy wagon L, 22T swapped (TW imitator) now with five forward speeds. (Gone, but never forgotten)
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It should not make much of a difference in HP vs. a decatted exhaust.
I'm thinking about catting my SS too.
I have a 3" inlet/3"outlet Catco cat. in the garage, I just have to go put it on.
I'm thinking about catting my SS too.
I have a 3" inlet/3"outlet Catco cat. in the garage, I just have to go put it on.
Last edited by BXSS on Wed Feb 13, 2008 2:27 pm, edited 1 time in total.
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Those laws are in effect across the entire country. Not all states or the counties within those states utilize the sniffer test yet. Most just have the visual inspection of the required parts for emissions control.lucas wrote:i kinda need the car to have a cat on it sense i live in California, gay ass emissions laws.
Jason
'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
'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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For the enviromentalist to use a cat is pure blasphomy. Catlytic converters change hydrocarbons and NOx into greenhouse gasses. The emissions inspection program is to improve air quality for HUMANS. Greenhouse gasses are very harmful to the environment, but not humans.
Take out your cat, prevent global warming. peace.
-Adam
Take out your cat, prevent global warming. peace.
-Adam
Kickin' it old-school.
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hA ha +1-ishArctic Assassian wrote:For the enviromentalist to use a cat is pure blasphomy. Catlytic converters change hydrocarbons and NOx into greenhouse gasses. The emissions inspection program is to improve air quality for HUMANS. Greenhouse gasses are very harmful to the environment, but not humans.
Take out your cat, prevent global warming. peace.
-Adam
we have more cows than people here so NO WORRIES!
Zach - Legacy Frankenstin
93forestpearl wrote:Keep up the good work. You'll never know what you are capable of unless you push yourself.
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cows farts = heavy methane concentration = green house gasses
Yep, I said cow fart...
Yep, I said cow fart...
Jason
'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
'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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Some state emission laws are more strict than others. California sets the highest standard and other states have followed: MA, CT, NJ, ME, MD, NY, OR, PA, RI, VT, WA. Surprisingly, the People's Republic of CO isn't in there! 16 states have challenged the EPAs denial that the state can set their own (stricter) standards in response to California's plan on regulating CO2 (which is really a way of regulating mileage).
Midnight in a Perfect World on Amazon or order anywhere. The first book in a quartet chronicling the rise of a man from angry criminal to philanthropist. Midnight... is a distopic noirish novel featuring 'Duchess', a modified 1990 Subaru Legacy wagon.
I'm guessing you're joking around....but in the event you're not...Arctic Assassian wrote:For the enviromentalist to use a cat is pure blasphomy. Catlytic converters change hydrocarbons and NOx into greenhouse gasses. The emissions inspection program is to improve air quality for HUMANS. Greenhouse gasses are very harmful to the environment, but not humans.
Take out your cat, prevent global warming. peace.
-Adam
Not that I'm condoning one way or another for cat use......your statement about emissions and green house gasses is very misleading and mostly incorrect in my mind.
NOx causes smog, and acid rain, pollution, etc. Last time I checked, those are bad for the environment. Excess HC & CO, again, aren't good for the environment either.
Josh
surrealmirage.com/subaru
1990 Legacy (AWD, 6MT, & EJ22T Swap)
2020 Outback Limted XT
If you need to get a hold of me please email me rather then pm
surrealmirage.com/subaru
1990 Legacy (AWD, 6MT, & EJ22T Swap)
2020 Outback Limted XT
If you need to get a hold of me please email me rather then pm
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ha ha i read both sides of that situation constantly and i'm still not sure what to believe... other than why would you put something in your car that will increase emissions.. like a cat. so i know that must be a point.dropdfocus wrote:Here it comes... The tree huggers vs. the speak freaks!
ish?
amen?
Zach - Legacy Frankenstin
93forestpearl wrote:Keep up the good work. You'll never know what you are capable of unless you push yourself.
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It's six one, half dozen the other. I'm gonna die before the shit hits the fan anyways, call me selfish, but my car will forever be UHEV.Legacy777 wrote:
I'm guessing you're joking around....but in the event you're not...
NOx causes smog, and acid rain, pollution, etc. Last time I checked, those are bad for the environment. Excess HC & CO, again, aren't good for the environment either.
Kickin' it old-school.
I ran my car cat-less for about 2 weeks until I could afford a high flow cat. Once I got the high flow cat put on, I really didn't notice a difference in power.
Just throw on a high quality high-flow cat and you'll be fine.
Just throw on a high quality high-flow cat and you'll be fine.
-Aaron
2000 Audi S4 - 2.7L Twin-turbo, 6 Speed
[quote="evolutionmovement"]It was me. And those are my balls. Happy Sunday![/quote]
2000 Audi S4 - 2.7L Twin-turbo, 6 Speed
[quote="evolutionmovement"]It was me. And those are my balls. Happy Sunday![/quote]
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And don't throw out the old one - bring it to a recycler - you should get some decent money for it.
Midnight in a Perfect World on Amazon or order anywhere. The first book in a quartet chronicling the rise of a man from angry criminal to philanthropist. Midnight... is a distopic noirish novel featuring 'Duchess', a modified 1990 Subaru Legacy wagon.
I am definately not a tree-hugger-particularly when mountain biking or skiing. But, going into each "Earth Day", I avoid eating flatulent foods, or drinking beer.
Subtle (normally aspirated engines suck):
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05 Legacy GT Wagon with Cobb chip.
62 Alfa Romeo Spider- had a 1.6 L with 80 hp, now 2 L with 160 torque. Curb weight 2050 lbs.
93 Leg Twgn fmic, vf34, etc. ((sold))
Re: high flow cat
Sorry to bump up an old thread, but I just picked up an Invidia Bellmouth Catless DP for my '92 SS and am considering adding a hi-flow cat in the event that I manage to pass visual part of the CA emissions test. Of course I will hang on to the stock DP, but there is a possibility that the technician wont notice the aftermarket cat, and with it, the sniff test should pass fine. I don't want to have to change back to stock if I can help it.
Anyway, I have been doing a little internet searching, and most metal cats (not talking ceramic - too restrictive) are rated by the density of their stainless steel core, ie: 100, 200 or 400 (factory) cells per square inch. Will a 200cpsi cat be hi-flow enough for a forced induction application or should I find a 100cpsi cat?
Anyway, I have been doing a little internet searching, and most metal cats (not talking ceramic - too restrictive) are rated by the density of their stainless steel core, ie: 100, 200 or 400 (factory) cells per square inch. Will a 200cpsi cat be hi-flow enough for a forced induction application or should I find a 100cpsi cat?
Re: high flow cat
I didn't know there was a standard to which they were rated. Every I've seen with one just says its a high flow, some say metal. I doubt most people know how dense theirs is.
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05 Outback 2.5XT 5spd -- Now the wife can have her SUV and get in on the turbo Legacy goodness at the same time.
Re: high flow cat
This is a good article explaining CPSI.
http://www.carexhaustreviews.com/what-d ... stand-for/
If you can find a 100 cpsi high flow can that would probably give you the least amount of back pressure through the cat. Will a 200 cpsi work, sure. I couldn't however tell you whether you'd notice a difference in performance between the 100 & 200.
http://www.carexhaustreviews.com/what-d ... stand-for/
If you can find a 100 cpsi high flow can that would probably give you the least amount of back pressure through the cat. Will a 200 cpsi work, sure. I couldn't however tell you whether you'd notice a difference in performance between the 100 & 200.
Josh
surrealmirage.com/subaru
1990 Legacy (AWD, 6MT, & EJ22T Swap)
2020 Outback Limted XT
If you need to get a hold of me please email me rather then pm
surrealmirage.com/subaru
1990 Legacy (AWD, 6MT, & EJ22T Swap)
2020 Outback Limted XT
If you need to get a hold of me please email me rather then pm
Re: high flow cat
Thanks Josh!