Thread: resonator?

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  1. #1 resonator? 
    SE Level Member MikeGTP88's Avatar
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    well i have been wanting to do something to my exhaust for a while not and was thing about the high flow cat and removing the resonator? howdo you guys think think this will sound?
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  2. #2 Re: resonator? 
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    if u still plan to retain your stock mufflers it will sound decent. i have a hi-flo magno-flo cat and a 2.5" catback to the stock mufflers. removing the resonator will cause the exhaust tone to be a little raspier but, again, if u plan on keeping your stock mufflers it wont sound too bad.
    old setup-Z7 Turbo Kit w/T66, A2A I/C, stock cam & valvetrain/LS1 MAF/Ported 99TB/PowrTuner/AFC/Devils Own/LS1M Scanner/PRJ FP/42# Injs=12.3@118mph street tires -
    (Sold)BACK TO M90 Vs cam w/3.5" pulley/meth/25* timing+bolt-ons
    01 Z28 A4 HP-self-tuned, LTs, FTRA, 3600stall 12.3@112mph
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  3. #3 Re: resonator? 
    SE Level Member MikeGTP88's Avatar
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    yes i plan on keeping the stock mufflers.
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  4. #4 Re: resonator? 
    SS-DD Level Member IndeedSS's Avatar
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    I wish I had kept my stock catback. I did have my resonator removed on my stock catback and it sounded ok for a V6...the quieter the better.IMO
    04 Indy SS build #972 - Traded
    2010 Camaro SS LS3
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  5. #5 Re: resonator? 
    Donating Users GR8racingfool's Avatar
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    I gutted my cat, and kept the stock resonator, and changed the mufflers to some dual chamber flow masters.

    A stock resonator will keep the rasp down, while giving the car some great sounding attitude through out the whole RPM range. Not just at idle.

    ~F~
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  6. #6 Re: resonator? 
    SS-DD Level Member IndeedSS's Avatar
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    Quote Originally Posted by GR8racingfool View Post
    I gutted my cat, and kept the stock resonator, and changed the mufflers to some dual chamber flow masters.

    A stock resonator will keep the rasp down, while giving the car some great sounding attitude through out the whole RPM range. Not just at idle.

    ~F~
    Really? I've not heard a good sounding V6 yet. But then again, my first car with headers and full exhaust was a 72 Chevelle 350. I suppose what sounds good is relative.
    At Branson I most liked the sound of Reptiles car at idle and Trannymans Cutlass.

    Can the stock resonator be put on a 2.5" catback w/o causing restriction? My GMPP resonator took a dump. Meineke put another resonator in it's place, which I thought made little difference in sound. However the restriction was so great no matter the pulley, I was getting 6* of knock. Remove the resonator and removed the knock. Thanks to Dave for finding this.
    04 Indy SS build #972 - Traded
    2010 Camaro SS LS3
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  7. #7 Re: resonator? 
    Donating Users GR8racingfool's Avatar
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    Its hard to get a good sounding V6 I agree.

    The stock down pipe, stock cat and if equipped with a u-bend is the most restrictive parts of stock exhaust. Next closest thing is where the pipe splits at the back to go to the mufflers, its not a smooth transition, like a free flowing "Y" its more of a "T" shape.

    Reptiles commented on my cars exhaust, and has been in it with the cat back dropped at the track. I dont remember if it was a good comment or a bad.

    At idle...I have a pretty good rumble, and a "ting" here and there which I think has a lot to do with the cat being gutted. Hard to explain...you hear it, you can tell what I'm talking about. I can start my car for you at Branson this year if you like.

    A picture of my exhaust:
    Before:


    After being "refreshed" for this year:


    Old installed picture when it was redone after my car was rebuilt after the accident.

    I reused the mufflers, though the right one was bent, we made it work again. It only had like 1K miles on it before I was creamed, wouldn't you try to reuse it too. LOL

    After the resonator its 3" pipe, but because nobody in town has a nice bender...its done the old fashioned way, crushed and formed. So some of the bends can get narrow is why we did 3". The first time we did the exhaust, before the accident, we did 2.5" and when we made the bends, it was down the same size as a stock pipe. We learned, and made changes.

    ~F~
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  8. #8 Re: resonator? 
    SS-DD Level Member IndeedSS's Avatar
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    Nicely done, and that is the stock resonator?

    Of course I want to hear your car at Branson.
    04 Indy SS build #972 - Traded
    2010 Camaro SS LS3
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  9. #9 Re: resonator? 
    Donating Users GR8racingfool's Avatar
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    Yup, thats my stock resonator, bolted on with stainless steel bolts and anti seized so things can be taken apart later down the road if need be.

    ~F~
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  10. #10 Re: resonator? 
    GXP Level Member Iron Indian's Avatar
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    Quote Originally Posted by GR8racingfool View Post
    After the resonator its 3" pipe, but because nobody in town has a nice bender...its done the old fashioned way, crushed and formed. So some of the bends can get narrow is why we did 3". The first time we did the exhaust, before the accident, we did 2.5" and when we made the bends, it was down the same size as a stock pipe. We learned, and made changes.

    ~F~
    Exact reason why I did my exhaust in 3", because I can only get crush bent around here.
    Shawn W. Larsen

    2005 Pontiac GTO 6.0 LS2/A4... Stalled/Cam Only: 406 RWHP , 370 RWTQ

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  11. #11 Re: resonator? 
    Donating Users GeddyLee's Avatar
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    I do believe you can go through Hogan Performance. They have the piping you might be seeking.

    Mandrel Bends

    And if those don't work out for ya? I am sure you could probably email or call him and tell him what you are seeking and he could probably fab you a pair? You would have to ask him on that one directly on that one though.

    Just a thought.

    James Shafer
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  12. #12 Re: resonator? 
    SE Level Member Blue03GTP's Avatar
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    I had my resonator removed I think it sounds alot better, mine doesn't make any rasp noise that is talked about. I was worries when I did mine that it would sound like crap and it doesn't least to me.
    Blue 2003 Limited Edition.
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  13. #13 Re: resonator? 
    SE Level Member MikeGTP88's Avatar
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    thanks for all the replys one other question..i was looking at a few different downpipes and high flow cats. i was looking at a zzp one and random tec one. i also talked to someone at an exhaust shop and he said something about the high flow cat may trip the ses light..anyone have this problem.
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  14. #14 Re: resonator? 
    GTP Level Member Toasty's Avatar
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    Quote Originally Posted by MikeGTP88 View Post
    thanks for all the replys one other question..i was looking at a few different downpipes and high flow cats. i was looking at a zzp one and random tec one. i also talked to someone at an exhaust shop and he said something about the high flow cat may trip the ses light..anyone have this problem.

    there have been a few incidents with older designed dp's tripping the SES light, but there are at least 3 fixes for this:

    1. get a spark plug anti-foul bushing (right thread count/pitch is vital here), screw that into the o2 bung, annd put the o2 in the bushing.

    2. leave the o2 as is, and use a powertuner/similar to delete the code from the PCM

    3. get an o2 simulator, and block off the pipe's o2 bung (or if you want to be stealthy, hide the o2 sim, and leave the stock sensor in place, route wire as to not show that it's not connected.-- for visual inspection)
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