axngen

What the heck is it?! What kind of gains do you get from it?! I hear it mentioned once every blue moon, and still have no idea what it is, or what the purpose of it is.

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99 5spd

ImagePree

it's a pipe that replaces the catalytic converter.

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See ...

WDW

yep from what alot of people tell me you get alot of gains from it but the check engine light comes on (thats the sucky part )

axngen

how much do these go for? do any companies out there make one or do you have to have one custom made? replacing the cat..hmm...can't you get in a LOT of trouble for that? ....wait a sec..i already did w/ my exhaust system

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99 5spd

DYI01

godspeed makes a nice test pipe that has an o2 sensor bung and a little bit of cat material so you dont get a check engine light, Its like $150 though

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1999 Premium pearl white SS Prelude (sold)
2002 Celica GT-S 6spd (current)


www.honda-motorcycles.org
honda civic forum

soloLude

you can get them custom made at muffler shops for about $200. companies such as random technology and focuz make "high flow cat converters," which are basically legal straigth pipes (test pipes). you cant get in trouble for it unless you get caught with it right

the HP gain is good for the $. my car pulled so much harder with the straight pipe (test pipe) combined with intake and exhaust. the only reason i took it off is because i get a check engine light and its a really big fine here in CA for having one. using it for track, however, will prove to have good results. i improved by more than 2 car lengths while racing a friend who i usually lost to...and with the pipe on i won the race.

cons:
the smell is really bad! it smells like gas is coming from your exhaust pipe. cars behind you would have to roll up their windows to resist the odor. also, there will be white smoke coming from your exhaust. this is how cops in CA assume that you have this illegal mod. next, if this is to any of your concerns, the check engine light does come on, but not becuase there is a problem. also, in low RPMs below 3000 it sounds kinda like a rock in a tin can, but after 3000 rpm its gone. i think its juss the sound of the air being freed oh and one more thing, it may be illegal in some states!

pros:
it frees up the exhaust system to gain the extra HP that the stock cat restricts. the exhaust tone is enhanced, and since i have a GReddy PE, which is somewhat quiet to me, the test pipe made the exhaust a bit louder and more enjoyable. overall, if there was not any check engine light, i would keep my test pipe. i was only concerned about the check engine light b/c my car is still new. stupid obd2. but hey! the obd2 workaround wil cure the check engine light problem

if any questions juss post

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01 Sportshift Prelude VTEC
eibach prokits
F/R strut bars
Apexi VAFC

soloLude

is godspeed a person or a website? if there isnt a check engine light i might get one

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01 Sportshift Prelude VTEC
eibach prokits
F/R strut bars
Apexi VAFC

xtal

It shouldn't be too big a deal to make a simple circuit that fakes the signal to the ECU.. then no light.. assuming it's a sensor the ECU uses to detect it. Haven't looked myself.

Steve

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...don't panic

DYI01

http://godspeed.hack.net/ Dan Ponze's a very reputable guy, a lot of people from the ht.com boards get stuff from him

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1999 Premium pearl white SS Prelude (sold)
2002 Celica GT-S 6spd (current)


www.honda-motorcycles.org
honda civic forum

soloLude

yeah its called the obd2 workaround...frees up 1 or 2 HP also! ntpog.org has the info check it out

and thanks DYI01...and u said it does not turn on a check engine light?

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01 Sportshift Prelude VTEC
eibach prokits
F/R strut bars
Apexi VAFC