test pipe= hp??

[nate93cb7]

does a test pipe really give you a bump up in hp and tq?

[Flatline]

i have heard that a test pipe will give you around 1 hp over the stock cat...

and you risk a fine seeing as it's illegal.

[93accordexcoupe]

you also risk losing low end tq becuase of the lack of back pressure, oh and the smell

[nate93cb7]

what about a high flow cat? its just basically a resignater isnt it

[92vig]

Get a high flow cat if you want to do anything but to be honest, the cost to power ratio is ridiculous. You want to spend $100+ on a high flow cat to gain MAYBE 1hp max? Not worth it. Just get a good catback system and a good header. Leave your cat alone, it's not going to do anything except make your car sound loud and pingy.

[deevergote]

what about a high flow cat? its just basically a resignater isnt it

It depends what you get. A high flow cat that doesn't do anything that a catalytic converter should do IS just a resonator (not resignater... that's not even a word). A catalytic converter has a purpose.

A test pipe is illegal in all 50 states, emission testing or not... though you usually won't be caught. You can gain SOME power, but not enough to really justify it. 1-2hp is about it.


If you want a good cat, go to www.sms-products.com and get one of their high-flow designs. SMSP is a well respected company, and they know what they're doing.

[GHOST 2.2]

you also risk losing low end tq becuase of the lack of back pressure, oh and the smell

do some reading

http://preludepower.com/forums/showt...t=backpressure

[deevergote]

How did I miss that?


YOU

DO

NOT

EVER

NEED

BACKPRESSURE!!!





When will the backpressure myth ever die?

[nate93cb7]

ya my cat is about to look like swiss cheese pretty soon, its rustin hardcore. its an ohio thing as you know. thats why i was interested in the subject. oh and thanks for the spell check i wasnt even payin attention. thanks for the help fellas....

[STL_92_Accord]

It depends what you get. A high flow cat that doesn't do anything that a catalytic converter should do IS just a resonator (not resignater... that's not even a word). A catalytic converter has a purpose.

A test pipe is illegal in all 50 states, emission testing or not... though you usually won't be caught. You can gain SOME power, but not enough to really justify it. 1-2hp is about it.


If you want a good cat, go to www.sms-products.com and get one of their high-flow designs. SMSP is a well respected company, and they know what they're doing.

SMS-Products is the shit. When I build my exhaust system there cat will definitly be there

[jdm92_accorn]

if you have the money get a chipped ecu so you can tune it and throw and gut the cat. it will look like you still have a functioning converter. they'll never pull your converter off to see if it works or not.

[deevergote]

SMS-Products is the shit. When I build my exhaust system there cat will definitly be there

If I didn't have my heart set on a Bisimoto header, the SMSP header would definitely be my choice. I know SMSP has Bisi's respect as well.

[deevergote]

if you have the money get a chipped ecu so you can tune it and throw and gut the cat. it will look like you still have a functioning converter. they'll never pull your converter off to see if it works or not.

A gutted cat provides unnecessary turbulence in the exhaust stream, and can actually result in LESS power.
Gutting a cat is about as smart as cutting your springs to lower your car.

[GHOST 2.2]

How did I miss that?


YOU

DO

NOT

EVER

NEED

BACKPRESSURE!!!





When will the backpressure myth ever die?

i dont know mike. some people like to base hearsay after what they hear often, even though when they dont know the right answer for sure. maybe if we get permission to quote this and add this to our tech Myth busters stickies then a tad bit more people in this website will be informed.

[Gotz Cb7]

My car ran better than it ever did, when I had the straight back exhaust. Noisy...but I loved it. My buddies all about this "back pressure" crap. Everytime I tell someone.."Man, my car feels like it's holding back because of the cat", they're all.."MAN, DON'T GET RID OF IT. YOU'LL LOSE BACK PRESSURE". I got this new engine put in the car...and still had the straight back exhaust, and ever since I put a Cat on it, and a muffler, it just doesn't run like it used to. Gas mileage went down, power loss. When I first got this engine, I ran 300 miles to Va. When I got the cat and shit put on, I went down to 240. (highway miles). So, this whole back pressure crap's gotta go. Very irritating.

If you wanna go straight back (test-pipe, etc), I say do it. There's mufflers out there that will kill your sound. Lets say...the Ws2 Apexi muffler. When I put my cat on...my car got LOUDER and HIGHER PITCHED, with the fart can on it. I got a Turbo Performance Muffler put on, and it's low...deep tone, and when I gun it, I hear more engine, than exhaust. But, I mean...if you want it loud, throw a fart can on it. There's ways to get around the sound. Now, if you have emissions, you're screwed. Wv doesn't have 'em, so I'm good.