Gutting A Catylic Converter

[EclipseDriver95]

yes i have a magnaflow pipe tip! I was jus wondering if i take every thing out of my factory catalyc converter, and just make it holow, if there will be any difference, in my motor performance, sound, any differences , etc....

Is it a bad or good idea????
Is it hard to do????
Will it mess any thing up, valves, etc, (back pressure)???

[Import2nr99]

Honestly never heard of anyone "gutting" a cat. Just buy a cheap high flow. Or get rid of the thing, if you're brave enough and have a cool mechanic that does your inspection. I think you'd be safest just buyin a high flow cat off ebay, if not a whole exhaust

[JoeWagon]

Ive been told it's not hard, I think RockinWRX used a tire iron.

[EclipseDriver95]

thanx guys for all the info.. Do yaw think it will help out on my hp???

[BoostedSpyder]

i think i even saw gutted cats on ebay, or somewhere... dsmreviews:

"Ryan - 1997 Mitsubishi Eclipse GS-T Catalytic Converters


Gutted stock cat

The car was bone stock when I got it for my brother. The first thing I did was drop out the cat (which is what I do to every car I get), knock out the ceramic discs, then I cram fit a cut piece of exhaust pipe and welded it in place. The reason for doing this is if the cat is gutted, then the exhaust gasses bow out in the cat chamber (creating some back pressure), so by having the pipe in place, it gives it the whole stock look, but test pipe functionality. Immediately the car ran cooler, and the turbo spooled up a lot faster, it is a real noticable HP gain. Then I added a performance stainless steel muffler, seems to be a bit much carbon build up on the muffler, and now the O2 sensors are throwing codes back. No worries on the O2 sensors, talked to the service technition, he suggested just taking them off, then cleaning them well with carb cleaner whenever I get check engine light codes."

[EclipseDriver95]

thanx bud, i was just thinking about gutting the whole thing and just putting it back on, or just replacing it with a piece of str8 pipe!

THANX FOR THE INFO.

[BoostedSpyder]

o ya, do you have a turbo? if you do, check this out

rre

look for the 2g FWD test pipe. it's only 60 bucks and it should bolt right on. that way you can save your cat for whenever you may have to smog it. when i got my first exaust, it cost me 50 bucks for the pipe and the flange, and these guy's make highly recomended down pipes too.

[95_GSX]

RRE is a great performance shop. i bought my DP from them. but i wouldn't pay $60 for a TP. plus i believe all their TP,DP, and and high flow cats are all 3".so if you are running a stock exhaust it wont bolt right in. and they only use apexi flanges. another reason why it wouldnt bolt in to a stock exhaust. buy some flanges and get yourself a piece of aluminized exhaust and build your own. that is of course if you have access to a mig-welder or oxy-acetalene torch. if you dont i am sure a shop would weld it together for no more than $10. that is if you jack the car up and allign the flanges to the pipe and mark them yourself. you can expect to pay apx. $3.50(probably less, since that was the price for 3", and you sound like you will be running smaller) a foot for aluminized exhaust pipe. i wouldn't expect you to use more than 14" of pipe.plus flanges. a TP of up to 3" should be able to be had for less than $20. i built my whole exaust myself for less than $450. hope that helps you out.

[BoostedSpyder]

we still don't even know if this guy has a turbo or not...

[EclipseDriver95]

my bad, no i have a gs, i do not have turbo, sorry for the mistake!

[mitsu_eclipse95gst]

gutting your cat just pull it off and get a 2by4 and a tire iron or some thing you can beat the crap out of it with. 2by4 is at the bottom so u dont screw up the cat. Worked for me when i had mine still on there.

[BoostedSpyder]

there wasn't any mistake, you just don't have the trim [rs, gs, gs-t, gsx] in your profile.

with non-turbo cars, the need of some back pressure is there.

· What is the best Exhaust to get?
This depends on several things: cost, sound and appearance. You will have to decide which exhaust system has the properties you are happiest with. One thing to keep in mind is that the exhaust system from the catalytic converter back (cat-back) is identical in setup to the GS-T. Any GS-T cat-back should bolt right in. Consider, however, that a turbo exhaust will not provide the ideal exhaust gas velocity for your engine. Reducing the exhaust gas velocity can reduce low-end torque.

The cheapest exhaust to get is the stock one from a GS-T. You can usually obtain them from 1995-1998 GS-T owners who are upgrading. Prices range from $20 to $100. This unit bolts on easily within an hour, flows better, looks better and sounds better than stock; and is still a "factory" part. This is highly recommended as a first mod.

this is from 2gnt.com

that is a little more info, kinda off topic. i'm not too sure how well a NT will do from doing the cat work. i'd say to go ahead and get a test pipe made from alum. tube and flanges, bolt it on and run it. like 95 gsx said, it's really cheap, and you can take it off or put it on yourself...

[EclipseDriver95]

goooooddddd iiideeaaa about the stock gs-t exaust pipe, thanx thanx, will u look for me, or find one, and tell me if so, thanx man

[Spectrum]

gutted cats = bad idea.

[JoeWagon]

Why?