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#74680 - 08/06/07 04:32 PM Resonator's and U-Bends...YIKES!
BlackTop Vinyl Offline
Member 		Registered: 05/14/07
Posts: 539
Loc: Chicago, IL
OK...so I plan to take out my resanator (SP?) and the u-bend and replace it with just some piping. But I have noiced the u-bemnd is there because of that 02 censor. If i remove that...do I have to replace it with another o2 censor, or what do I do?
Or, can I run fine without that censor at all?
HELP!!
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#74681 - 08/06/07 04:38 PM Re: Resonator's and U-Bends...YIKES!
D Offline
Member 		Registered: 03/02/06
Posts: 1059
Loc: Brooklyn, NY
No you can take out your o2 sensor and put it in the sriaght pipe its ok, but I would go out and by a D/P from ZZP or another site. IF you do it yourself you will need to make sure you put interflex in there b/c you can't put just a solid pipe. the eninge moves and needs to be able to flex also you would like to keep the resonator b/c with out it its Loud and there is no performance gains and takeing it out. its a striaght pipe to being with.
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1997 Grand Prix GT: ZZP SS M90 Kit--P&P Blower and LIM--3.8" Modular pulley--36# injectors--ZZP Wizair CAI--8.5mm MSD Wires--Autolite 103s@ .052--180* drilled T-stat--Tune Time Performance Tune--ZZP 2.5" D/P w/o Cat--ZZP Stage 1 HV TB--ZZP Power Log & Rear PEM--ZZP Poly Motor & Tranny Mounts--Flowmaster 40 Series Delta Flow Mufflers--Auto Meter Z Series Boost & Oil Pressure Gauges--Aeroforce Interceptor Scan Gauge

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#74682 - 08/06/07 04:41 PM Re: Resonator's and U-Bends...YIKES!
ordonez1307 Offline
Member 		Registered: 04/18/05
Posts: 8901
Loc: Bradenton, FL
if you remove your 02 sensor it will throw an SES code. just drill a hole and use the 02 bung.
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Corey Smith
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#74683 - 08/06/07 04:41 PM Re: Resonator's and U-Bends...YIKES!
BlackTop Vinyl Offline
Member 		Registered: 05/14/07
Posts: 539
Loc: Chicago, IL
Really...i was under the strong impression from many various sites that taking out the rasanator increaces hp baout 5 or 6. Also...what do you mean by interflex?
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#74684 - 08/06/07 04:42 PM Re: Resonator's and U-Bends...YIKES!
ordonez1307 Offline
Member 		Registered: 04/18/05
Posts: 8901
Loc: Bradenton, FL
and no, removing the resonator wont do anything. flex pipe is what comes on the 3" downpipes
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Corey Smith
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#74685 - 08/06/07 06:22 PM Re: Resonator's and U-Bends...YIKES!
ThunderBat Offline
Member 		Registered: 03/11/04
Posts: 5176
Loc: Virginia
there is no hoesrpower to be gained by taking out the resonator...its a straight pipe thru the middle of a tin can whose sole purpose is to kill the droning noise inside your car.
Most any exhaust shop that does custom exhaust can easily fabricate you a replacement pipe for your U-bend...they can weld the O2 bung onto the side so you can re-install the sensor.
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#74686 - 08/07/07 01:14 AM Re: Resonator's and U-Bends...YIKES!
drummerboy1307 Offline
Member 		Registered: 04/30/06
Posts: 3201
Loc: Groton, CT
I would just buy a whole replacement 3" downpipe if I were you. And yes, listen to these guys... keep your resonator in! Whoever said it frees up HP is completely ignorant. There is nothing to free up by removing it.

The ubend delete however is good for about 2-4 whp though, but a whole replacement downpipe will free up 10-15 whp.
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'97 SE with alot of mods
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#74687 - 08/07/07 02:32 AM Re: Resonator's and U-Bends...YIKES!
Chico Offline
Member 		Registered: 02/08/04
Posts: 3463
Loc: Gonzales Tx.
Quote:
Originally posted by BlackTop Vinyl:
Really...i was under the strong impression from many various sites that taking out the rasanator increaces hp baout 5 or 6. Also...what do you mean by interflex?
There is about a 5hp gain from the u-bend removal.Chico(pops)
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04 GTO stock,04 Titan,97 GP GT too many mods to list,90 Corvette & project cars, http://photobucket.com/albums/v206/chico1319
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#74688 - 08/08/07 12:51 AM Re: Resonator's and U-Bends...YIKES!
BlackTop Vinyl Offline
Member 		Registered: 05/14/07
Posts: 539
Loc: Chicago, IL
Quote:
Originally posted by ThunderBat:
there is no hoesrpower to be gained by taking out the resonator...its a straight pipe thru the middle of a tin can whose sole purpose is to kill the droning noise inside your car.
Most any exhaust shop that does custom exhaust can easily fabricate you a replacement pipe for your U-bend...they can weld the O2 bung onto the side so you can re-install the sensor.
So all i have to do, is get a small straight pipe replacement on the u-bend and have the o2 censor re atached to the straight piece?
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#74689 - 08/08/07 01:47 AM Re: Resonator's and U-Bends...YIKES!
drummerboy1307 Offline
Member 		Registered: 04/30/06
Posts: 3201
Loc: Groton, CT
For what that might cost, it would make more sense to just buy a whole 3" downpipe. The u bend is def. restrictive, but so is the rest of the stock downpipe and you'll see much nicer gains and reduction in KR, and for the price
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'97 SE with alot of mods
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