Custom Exhaust Help - Club4G Forum : Mitsubishi Eclipse 4G Forums - 2006-2012 Eclipse Authority

NWood92 · June 30th, 2011, 02:31 AM

Alright, I have a custom Exhaust set-up where i'm running a Header-back Exhaust, but I have replaced the Stock Cat Converter with at 2.5" Vibrant Performance High Flow Converter. Although it sounds good revving, at some points, it doesn't sound good.

For Example: If I switch to slapshifting, everytime it slows down, I hear a "Grinding" noise. I'm not sure if it's the Cat Converter moving around, or what, but it doesn't sound good going down the road.

Just need some advice, and I'm not removing it (wish I could but I really don't want to get in trouble with cops) and not getting another converter. So, do you think it would just be best to put the stock Cat Converter back in or will I just have to end up buying another converter. Please help if possible. thanks

DustinH · June 30th, 2011, 02:37 AM

Have you been under there to see if your exhaust is hitting anything? When you replace the converter after you cut it out you have to get the exhaust back just right like it was from the factory or the exhaust at the bend before the axle will hit or rub on the axle. I'd check it out towards the rear of the car.

NWood92 · June 30th, 2011, 02:39 AM

I will check it out tommorrow. I was thinking of taking it to a Exhaust shop. Hopefully, they would know something lol

DustinH · June 30th, 2011, 02:45 AM

They should....I've heard the sound your describing. Mine did it when the engine torqued. I screwed up when i did my exhaust the first time and it was hitting on the rear end. Nothing major though!

NWood92 · June 30th, 2011, 02:46 AM

well, mine sounds like it's coming from the cat itself or somewhere near the front, not the back

Ricoswave · June 30th, 2011, 07:57 AM

I would venture to guess its smacking the crossmember, mine did this when I first had mine done and I had to make some changes. Any kind of metal on metal noise is just contact/vibration. The heat shields suck!!

JoeyC · June 30th, 2011, 10:45 AM

somethings loose!

NWood92 · July 29th, 2011, 11:46 PM

well, can anyone show me what their custom exhaust underneath their car looks like. I think my cat converter is in the wrong place

June 30th, 2011, 02:31 AM	#1 (permalink)
NWood92 Member Name: Nick Join Date: Jan 2010 Location: Parsons, Tennessee Vehicle: 2008 Eclipse GT Posts: 89 Rep Power: 3	Custom Exhaust Help Alright, I have a custom Exhaust set-up where i'm running a Header-back Exhaust, but I have replaced the Stock Cat Converter with at 2.5" Vibrant Performance High Flow Converter. Although it sounds good revving, at some points, it doesn't sound good. For Example: If I switch to slapshifting, everytime it slows down, I hear a "Grinding" noise. I'm not sure if it's the Cat Converter moving around, or what, but it doesn't sound good going down the road. Just need some advice, and I'm not removing it (wish I could but I really don't want to get in trouble with cops) and not getting another converter. So, do you think it would just be best to put the stock Cat Converter back in or will I just have to end up buying another converter. Please help if possible. thanks

June 30th, 2011, 02:37 AM	#2 (permalink)
DustinH Amarillo 4g Name: Dustin Join Date: Apr 2010 Location: Amarillo Tx Posts: 2,026 Rep Power: 5	Have you been under there to see if your exhaust is hitting anything? When you replace the converter after you cut it out you have to get the exhaust back just right like it was from the factory or the exhaust at the bend before the axle will hit or rub on the axle. I'd check it out towards the rear of the car. __________________ You've got questions, We have answers -->http://club4g.org/board/search.php

June 30th, 2011, 02:39 AM	#3 (permalink)
NWood92 Member Name: Nick Join Date: Jan 2010 Location: Parsons, Tennessee Vehicle: 2008 Eclipse GT Posts: 89 Rep Power: 3	I will check it out tommorrow. I was thinking of taking it to a Exhaust shop. Hopefully, they would know something lol Last edited by NWood92; June 30th, 2011 at 02:43 AM.

June 30th, 2011, 02:45 AM	#4 (permalink)
DustinH Amarillo 4g Name: Dustin Join Date: Apr 2010 Location: Amarillo Tx Posts: 2,026 Rep Power: 5	They should....I've heard the sound your describing. Mine did it when the engine torqued. I screwed up when i did my exhaust the first time and it was hitting on the rear end. Nothing major though! __________________ You've got questions, We have answers -->http://club4g.org/board/search.php

June 30th, 2011, 07:57 AM	#6 (permalink)
Ricoswave Lathe Master Join Date: Nov 2007 Vehicle: 05 Lancer Evolution Posts: 3,726 Rep Power: 10	I would venture to guess its smacking the crossmember, mine did this when I first had mine done and I had to make some changes. Any kind of metal on metal noise is just contact/vibration. The heat shields suck!! __________________ Mods: Progress Lowering Springs, Fujita CAI, Full 2.5" Stainless Exhaust, Aero Turbine 2540I Muffler, Ripp Long Tube Headers (SES Free), Dynomax High Flow Cat, Thrush Stainless Resonator, Ripp Poly Motor Mounts, Glowshift Gauge Pod and Gauges, GTech SS, Custom Glass Radiator Hose, TWM GS Short Shifter w/ custom reverse lockout, TB Bypass, Red Neon Decklid

		Club4G Forum : Mitsubishi Eclipse 4G Forums - 2006-2012 Eclipse Authority > Performance and Technical > Eclipse Performance
Custom Exhaust Help

June 30th, 2011, 02:46 AM	#5 (permalink)
NWood92 Member Name: Nick Join Date: Jan 2010 Location: Parsons, Tennessee Vehicle: 2008 Eclipse GT Posts: 89 Rep Power: 3	well, mine sounds like it's coming from the cat itself or somewhere near the front, not the back

June 30th, 2011, 10:45 AM	#7 (permalink)
JoeyC -cruzer- Name: joeyc Join Date: Nov 2010 Location: AZ Vehicle: 2006 ECLIPSE GT Posts: 1,579 Rep Power: 3	somethings loose! __________________

July 29th, 2011, 11:46 PM	#8 (permalink)
NWood92 Member Name: Nick Join Date: Jan 2010 Location: Parsons, Tennessee Vehicle: 2008 Eclipse GT Posts: 89 Rep Power: 3	well, can anyone show me what their custom exhaust underneath their car looks like. I think my cat converter is in the wrong place

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