Test Pipe

Corby · December 16th, 2007, 09:24 AM

What exactly does the test pipe replace and what does it do? i think its something to do with exhaust correct me if im wrong?

On my car now i have a duel tip stainless steel muffler and it sounds pritty mean what would the pipe do?

s8n · December 16th, 2007, 09:30 AM

You serious?

It replaces your catalytic converter. You'll free up about 5hp or so. If you get a non resonated TP your exhaust will be loud as hell. If you get a resonated TP it will help keep it quiet and reduce drone until you hit high RPM's.

Corby · December 16th, 2007, 09:36 AM

Should i go for a resonated one or a non?

sean22306 · December 16th, 2007, 09:53 AM

I have a resonated test pipe with a borla catback and it sounds pretty mean. Nice and quiet at idle and screams at high rpms. What year car do you have? For me it was a pain in the ass since I have a 97.

Corby · December 16th, 2007, 10:29 AM

i have a 96

2ndgengt · December 16th, 2007, 12:26 PM

obd2 it a little more complicated 2 make or buy a tp

sean22306 · December 16th, 2007, 01:01 PM

Actually its not more complicated for a 96 bc it has 2 o2's in the headers (after the cats in the headers) instead of one after the main cat. It doesnt have one downstream like the 97's. So it shouldnt be an issue or pull any codes like mine does.

dillinr · December 16th, 2007, 09:34 PM

And if you have to ask what it is I would suggest you pay somebody to put it in for you

Ryan

the_new_kid · December 16th, 2007, 09:39 PM

Would it work just as well to punch out the cat instead?

dillinr · December 16th, 2007, 10:11 PM

My first reaction is no. Now you have a hollow chamber in to which the exhaust gasses will expand, loosing velocity, and introducing turbulence into the exhaust stream, especially as it must exit the other end, getting squeezed back into the pipe size of your choice.

However, one advantage would be the expanding of the gasses would serve to keep the exhaust quiet...and very unlikely possibility, the expansion of the gasses could have a scavenging effect, sucking out gasses from the pipe into the chamber, actually increasing efficiency, however then it still has to get out of the other end of the cat...

But to put the whole thing in perspective...If you really don't need the cat, sell the bastard, or at very least take it to a metal recycler, I get $30 average for a still mostly intact converter.

Ryan

KLDEsoon2BTURBO · December 17th, 2007, 07:46 PM

My friend has a Audi twin turbo V6 that has 2 cats, he punched them both out a few years back and gained power and has had no problems since, so if you really want to just punch them out. Although he did it because it was an integrated cat-downpipe, so just bolting in a test pipe was expensive and a pain

Domino81 · December 17th, 2007, 08:00 PM

Quote:

Originally Posted by s8n

You serious?

It replaces your catalytic converter. You'll free up about 5hp or so. If you get a non resonated TP your exhaust will be loud as hell. If you get a resonated TP it will help keep it quiet and reduce drone until you hit high RPM's.

Oh, c'mon, Jin. You're tellin' me as a highschool senior you knew full well what a test pipe was?

That being said you coulda searched, kid.

I have a Borla + testpipe, it's really not that loud at all.

http://thumbs.streetfire.net/cbce88d...2d62afcd87.jpg 1995 Ford Probe GT w/Borla and a testpipe!

Resonated test pipes really will help mellow out the sound and eliminate the rasp you get with certain additions to an exhaust.

dillinr · December 17th, 2007, 10:58 PM

On the subject, here's a good comparo of testpipe sound Vs Stock Cat sound. Exhaust was Ebay Headers, 2.5" manderel bends and Magnaflow 22x4" round muffler in the stock resonator location, side exit exhaust:
http://videos.streetfire.net/video/b...9d004a9872.htm

Ryan

December 16th, 2007, 09:24 AM	#1
Corby Newbie Join Date: Dec 2007 Location: Dunnville Age: 19 Posts: 10	Test Pipe What exactly does the test pipe replace and what does it do? i think its something to do with exhaust correct me if im wrong? On my car now i have a duel tip stainless steel muffler and it sounds pritty mean what would the pipe do?

December 16th, 2007, 09:30 AM	#2
s8n Senior Member Join Date: Jan 2003 Location: Encinitas, CA Age: 28 Posts: 3,064	You serious? It replaces your catalytic converter. You'll free up about 5hp or so. If you get a non resonated TP your exhaust will be loud as hell. If you get a resonated TP it will help keep it quiet and reduce drone until you hit high RPM's. __________________ '93 Rio Red PGT - Dead and in the garage To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts. '93 Silver PGT - Temperamental and heavily modified '07 Black A4 - A turbo, exhaust gasses go into the turbocharger and spin it, witchcraft happens and you go faster.

December 16th, 2007, 09:53 AM	#4
sean22306 Senior Member Join Date: Sep 2006 Location: Northern KY Posts: 2,054	I have a resonated test pipe with a borla catback and it sounds pretty mean. Nice and quiet at idle and screams at high rpms. What year car do you have? For me it was a pain in the ass since I have a 97. __________________ To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts. too many mods to list here

December 16th, 2007, 12:26 PM	#6
2ndgengt Turbo Member Join Date: Feb 2005 Location: oregon Age: 22 Posts: 1,908	obd2 it a little more complicated 2 make or buy a tp __________________ Rio Red To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts. mtx Mods - To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts. , Probinator chip, Bomz cai, 2.5 To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts. catback, 2.5 custom tp, ACT, Fidanza, ss line, ssac headers, poly inserts, Intrax, illuminas, cusco camber plates de-t coming soon'ish To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts. zoom-zoom to the max To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts. GrpJuce is up and running

December 16th, 2007, 01:01 PM	#7
sean22306 Senior Member Join Date: Sep 2006 Location: Northern KY Posts: 2,054	Actually its not more complicated for a 96 bc it has 2 o2's in the headers (after the cats in the headers) instead of one after the main cat. It doesnt have one downstream like the 97's. So it shouldnt be an issue or pull any codes like mine does. __________________ To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts. too many mods to list here Last edited by sean22306; December 16th, 2007 at 06:01 PM.

December 16th, 2007, 09:36 AM	#3
Corby Newbie Join Date: Dec 2007 Location: Dunnville Age: 19 Posts: 10	Should i go for a resonated one or a non?

December 16th, 2007, 10:29 AM	#5
Corby Newbie Join Date: Dec 2007 Location: Dunnville Age: 19 Posts: 10	i have a 96

December 16th, 2007, 09:34 PM	#8
dillinr Senior Member Join Date: Nov 2002 Location: Salt Lake City, Utah Age: 27 Posts: 2,443	And if you have to ask what it is I would suggest you pay somebody to put it in for you Ryan __________________ Ryan '94 Mazda MX6 V-6 STX Prep: MFactory LSD [] TEIN [] Enkei 17x9 RPF1 [] Toyo R1R [] Hawk HP+ [] Schroth [] Corbeau [] AWR [] HotShot [] Headers [] Magnaflow [] Side Exit []

December 16th, 2007, 09:39 PM	#9
the_new_kid Donating Member Join Date: Feb 2005 Location: Fond du Lac WI Age: 22 Posts: 633	Would it work just as well to punch out the cat instead? __________________ Just another run of the mill probe enthusiast. I own a 93 626 with a thrown rod.

December 16th, 2007, 10:11 PM	#10
dillinr Senior Member Join Date: Nov 2002 Location: Salt Lake City, Utah Age: 27 Posts: 2,443	My first reaction is no. Now you have a hollow chamber in to which the exhaust gasses will expand, loosing velocity, and introducing turbulence into the exhaust stream, especially as it must exit the other end, getting squeezed back into the pipe size of your choice. However, one advantage would be the expanding of the gasses would serve to keep the exhaust quiet...and very unlikely possibility, the expansion of the gasses could have a scavenging effect, sucking out gasses from the pipe into the chamber, actually increasing efficiency, however then it still has to get out of the other end of the cat... But to put the whole thing in perspective...If you really don't need the cat, sell the bastard, or at very least take it to a metal recycler, I get $30 average for a still mostly intact converter. Ryan __________________ Ryan '94 Mazda MX6 V-6 STX Prep: MFactory LSD [] TEIN [] Enkei 17x9 RPF1 [] Toyo R1R [] Hawk HP+ [] Schroth [] Corbeau [] AWR [] HotShot [] Headers [] Magnaflow [] Side Exit []

December 17th, 2007, 07:46 PM	#11
KLDEsoon2BTURBO Newbie Join Date: Dec 2007 Location: Colorado Age: 22 Posts: 19	My friend has a Audi twin turbo V6 that has 2 cats, he punched them both out a few years back and gained power and has had no problems since, so if you really want to just punch them out. Although he did it because it was an integrated cat-downpipe, so just bolting in a test pipe was expensive and a pain

December 17th, 2007, 10:58 PM	#13
dillinr Senior Member Join Date: Nov 2002 Location: Salt Lake City, Utah Age: 27 Posts: 2,443	On the subject, here's a good comparo of testpipe sound Vs Stock Cat sound. Exhaust was Ebay Headers, 2.5" manderel bends and Magnaflow 22x4" round muffler in the stock resonator location, side exit exhaust: http://videos.streetfire.net/video/b...9d004a9872.htm Ryan __________________ Ryan '94 Mazda MX6 V-6 STX Prep: MFactory LSD [] TEIN [] Enkei 17x9 RPF1 [] Toyo R1R [] Hawk HP+ [] Schroth [] Corbeau [] AWR [] HotShot [] Headers [] Magnaflow [] Side Exit []