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09-19-2007, 03:22 PM
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Bathroom + Laptop = <3
Drives: Audi Join Date: Aug 2006
Location: Dorchester
Posts: 1,009
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Benefits of Removing Cat and Running Straight Pipe?
Just wondering what everyone thinks of cutting out the cats and running straight pipes. Will it add more power, because of it being more free flowing(I know its not a turbo vehicle but hey). Will it sound nicer or more annoying, does anyone have any vids or sound clips. Any comment is appreciated...
I don't have to worry about inspection or anything and global warming is BS so please no tree hugging splurs... It's not that I don't care about the environment I yell at people for littering. |
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09-19-2007, 03:26 PM
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#2 |
 Drives: Yaris Join Date: Jun 2007
Location: Pittsburgh
Posts: 136
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you might lose
compression |
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09-19-2007, 03:28 PM
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46 and 2, just ahead...
Drives: 07 Yaris sedan Join Date: Jun 2007
Location: Johnstown, PA
Posts: 533
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Plus, it will sound like a crappy motorcycle, from wht I've seen; also, I can't imagine there's much HP to gained from this. Between noise and environmental concerns, I really don't see the sense in doing this. But then, I rarely see sense in anything
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Zero to Sixty in just fifteen minutes... |
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09-19-2007, 03:29 PM
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#4 |
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The Man In Black Lives
Drives: Black Sand Pearl L/B 'o7 Join Date: Jul 2007
Location: SF Bay Area
Posts: 477
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Don't u run the risk of burning the exhaust valves with no back pressure with a straight pipe ? as they would heat up to much ...
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black2yaris The Man In Black Lives! 2007 2 door hatchback in Black Sand Pearl, A/T,rear spoiler,front & rear JDM badges,TRD CAI,TRD rear sway bar,exhaust tip,sill protectors,heximats,under dash blue LED's,short rubber ant,rear bumper protector,Toyota thin 7 spoke alloy wheels,pwr pkg,ABS,side curtain airbags,rear defogger,fog lights,mud guards,TYC tail lights,shift knob,tint all windows,security sys,keyless entry,clear paint protection all exposed front surfaces,TRD fuel cap,rubber dash & g/b mats |
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09-19-2007, 03:44 PM
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#5 |
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Bathroom + Laptop = <3
Drives: Audi Join Date: Aug 2006
Location: Dorchester
Posts: 1,009
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ahhh then no go then thats all i wanted... now what if i downsized the exhaust!!! more compression muahahaha.... pure NA POWA
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09-19-2007, 03:47 PM
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wacky broadway nightmare
Drives: Willow is a '07 Red Yaris LB Join Date: Apr 2007
Location: dallas
Posts: 621
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Power? You're driving a Toyota Yaris.
Just sayin.
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"it's always complicated and at some point someone has to draw the line and that is always going to be me. you get down on me for cutting myself off but in the end the slayer is always cut off" Buffy 
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09-19-2007, 03:58 PM
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#7 |
 
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I have seen a lot of 4 Cyl cars running straight pipes and believe me if this is done right there si no way you will loose compression so go figure.
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 It's a Vitz! |
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09-19-2007, 04:00 PM
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Steals terrorist's lunch
Drives: 2007 Yaris Liftback Join Date: Mar 2007
Location: Reno, Nevada, USA
Posts: 1,299
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The catalytic converter serves many valuable purposes, but mainly the severe reduction of noxious emissions. Not only does this greatly help the environment but it is also mandated by Federal law.
To remove it is one of the most irresponsible and selfish things an automobile owner can do, and it is my sincere hope that anyone that does so gets caught and punished for it.
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- Brian Share the Road I often carry 2 carpool passengers and mountain bikes or snowboards/skis over a 4,500 foot elevation difference. Click the graphic above to see my detailed mileage logs. |
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09-19-2007, 04:05 PM
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#9 | |
Drives: 2005 Scion xB Join Date: Nov 2006
Location: The Black Hills of South Dakota
Posts: 1,059
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Quote:
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09-19-2007, 04:08 PM
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Modded Moderator
Drives: 07 Toyota Yaris, 71 Galaxie Join Date: Mar 2007
Location: Wenatchee, WA
Posts: 3,670
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On my turbo lebaron I upgraded to a 3" exhaust and kept the cat. You can get performance cats that filter out the emissions their supposed to while providing high-flow. I purchased one for cheap on ebay from a seller that sold catco brand. Worked great. There is NO testing where I live, but I wanted to keep it legit.
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09-19-2007, 04:08 PM
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Quote:
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It's a Vitz! |
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09-19-2007, 10:12 PM
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Spool'd
Drives: 07 yaris, 16 gen coupe rspec Join Date: Aug 2007
Location: Toronto, Canada
Posts: 161
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A lot of people around here with loud mufflers on their civics get their exhaust shops to cut a hole at the top of the cat and hollow it out then wield the top back on so from underneath unless you look really close, it looks normal. But really inside it's just a straight pipe through the cat's outer shell.
In Ontario we have really strict emissions testing, but it isn't too hard to get emissions faked. When I got my first car I didn't know it was so badly beat up as it was, and I was told by a few mechanics the best and easiest solution to solve the emissions problem was to get a new car, which I couldn't do. When I ran out of temp plates the DMV would give me, I finally had to get the papers done. Still had the car 4 months after that till it totally died. I even replaced the cat on that car and ALL of the o2 and no2 sensors on the exhaust...still didn't fix the emissions. Kept failing on what the place called "nox". Limit was 200 and something and my car was doing in the 2500's |
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09-19-2007, 10:30 PM
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Steals terrorist's lunch
Drives: 2007 Yaris Liftback Join Date: Mar 2007
Location: Reno, Nevada, USA
Posts: 1,299
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Quote:
1) GHG (greenhouse gases - Carbon Dioxide and Nitrous Oxide) 2) Nox (noxious emissions - Nitrogen Oxide, Carbon Monoxide, Sulfur Dioxide, various carcinogenic (cancer-causing) hydrocarbons... all the stuff that acid rain is made of) 3) Passive (paint flakes and fumes, leaking fluids, etc.) A catalytic converter helps mostly with the "nox" group.
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- Brian Share the Road I often carry 2 carpool passengers and mountain bikes or snowboards/skis over a 4,500 foot elevation difference. Click the graphic above to see my detailed mileage logs. |
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09-19-2007, 10:33 PM
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der Zeck
Drives: '05 Audi A4 1.8t quattro Join Date: Sep 2006
Location: Toledo, OH
Posts: 5,231
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Quote:
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I was going to wait to go catless, but just because of that comment from Brian/BailOut, I am getting them bitches cut out and throwin another resinator in. I wish I lived near him, I would blow those noxious emissions right on his door step.
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09-19-2007, 10:35 PM
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der Zeck
Drives: '05 Audi A4 1.8t quattro Join Date: Sep 2006
Location: Toledo, OH
Posts: 5,231
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Quote:
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09-19-2007, 11:08 PM
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Spool'd
Drives: 07 yaris, 16 gen coupe rspec Join Date: Aug 2007
Location: Toronto, Canada
Posts: 161
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Quote:
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09-19-2007, 11:12 PM
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Medium Pimpin
Drives: 07 Gerbil Powered Hatchback Join Date: Sep 2007
Location: Wichita
Posts: 107
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Quote:
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09-19-2007, 11:14 PM
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Spool'd
Drives: 07 yaris, 16 gen coupe rspec Join Date: Aug 2007
Location: Toronto, Canada
Posts: 161
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Quote:
Haha, I like your response. |
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