Deleting resonators and muffler?
- Thread starter Jesse MS3GT
- Start date
dandydaniel
Member
- :
- 2008.5 Mazdaspeed 3
Just had the muffler and 2nd resonator removed. It sounds great but still too quiet in my opinion. I think I might go back and have the last resonator removed as well. Anyone have a video with all 3 gone?
Just this bad quality one where the guy for some reason had his stereo up louder than his exhaust.
http://www.youtube.com/watch?v=MCYES7tT_MA&feature=related
And yes, I'd assume you'd get the best of both worlds, but maybe a bit too loud...not sure though.
SharkDiver
Member
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- Speed3
I wouldnt remove it untill you install your DP because that will change the sound alot..I kinda wish I wound of left the muffler on now that I have a DP and test pipe with no cats..
MS3_Kendall
Member
- :
- 2007 Mazdaspeed 3
The very first mod I did on my 07 MS3 was a CPE CAI, custom mandrel bent 2.5" exhaust with both resonators deleted and muffler deleted. I kept just the muffler tip. I dyno'd 260WHP & 265WTQ at stock PSI.
Obviously the resonator delete and muffler delete helped with exhaust flow.
Obviously the resonator delete and muffler delete helped with exhaust flow.
I kept my old resonator, and even though its completely straight through, the baffles and chambers must have an affect on flow somehow. My guess is that all the componenets of the MS3's exhaust change flow some way or another, otherwise we wouldnt see an improvement in throttle response from these changes.
MS3_Kendall
Member
- :
- 2007 Mazdaspeed 3
So you still have one resonator on? It should not be too much of a difference in air flow. It will just help to muffle the sound on your exhaust.
I've only removed the middle resonator so far. I swear throttle response is improved. I can also hear RPM between shifts so I can drive the car smoother (I usually wear boots and I can't feel the gas pedal, at least I can hear the motor a bit now), but I'm not sure what to cut out next, the other resonator, the muffler on the end, or both.
I wanted to do this mod and debated for a long time. I ended up getting and installed my downpipe and midpipe first. Man, it makes quite a bit of difference in the way the car sounds. Warming up, idle is pretty loud... attention drawing loud. Once it warms up, idle is only noticeable outside the car. While driving, it's significantly louder outside. Inside there is always a bassy sound from the engine. I'm not going to say you can cruise quietly, because I can't anymore. If I'm moving, I hear my motor, and engine drone when off the gas is kind of annoying, but can be avoided by giving it a touch of gas.
The performance boost is fantastic (once the ecu relearns whats going on). Sorry guys, but I can't see how removing resonators can give you a big noticeable increase in power. Remember Mazda said 30 horsepower from their CAI and CBE, but they also said the CAI gave about 25 on its own.
I like what I've done, but wanted to be honesty about how much volume it adds, it seems like some people have said "it's only a little bit louder" but I don't think it's THAT tiny an increase.
Unfortunately, (being a musician
) I love the sounds my car makes almost as much as I enjoy driving it. The dp/rp don't give it the "sti burble" that I know a lot of us are aiming at. Does anyone know if removing the rear resonator/muffler could make that happen? I like my volume where it is, I'm just looking for burble.
Who said I was picky?? (butt)
The performance boost is fantastic (once the ecu relearns whats going on). Sorry guys, but I can't see how removing resonators can give you a big noticeable increase in power. Remember Mazda said 30 horsepower from their CAI and CBE, but they also said the CAI gave about 25 on its own.
I like what I've done, but wanted to be honesty about how much volume it adds, it seems like some people have said "it's only a little bit louder" but I don't think it's THAT tiny an increase.
Unfortunately, (being a musician
) I love the sounds my car makes almost as much as I enjoy driving it. The dp/rp don't give it the "sti burble" that I know a lot of us are aiming at. Does anyone know if removing the rear resonator/muffler could make that happen? I like my volume where it is, I'm just looking for burble. Who said I was picky?? (butt)
dukemoreau
Member
- :
- MSP 2003.5, 2004 Stage 3r SRT-4
when i took the cat and resonator off of my SRT...it got SOOO LOUD! it did help spool up a bit. it was to loud for the DD, so i now have a full 3" with a high flow racing CAT and a HKS Tri Carbon muffler. car is quiet now but still saw power gains out of it.
MS3_Kendall
Member
- :
- 2007 Mazdaspeed 3
I wanted to do this mod and debated for a long time. I ended up getting and installed my downpipe and midpipe first. Man, it makes quite a bit of difference in the way the car sounds. Warming up, idle is pretty loud... attention drawing loud. Once it warms up, idle is only noticeable outside the car. While driving, it's significantly louder outside. Inside there is always a bassy sound from the engine. I'm not going to say you can cruise quietly, because I can't anymore. If I'm moving, I hear my motor, and engine drone when off the gas is kind of annoying, but can be avoided by giving it a touch of gas.
The performance boost is fantastic (once the ecu relearns whats going on). Sorry guys, but I can't see how removing resonators can give you a big noticeable increase in power. Remember Mazda said 30 horsepower from their CAI and CBE, but they also said the CAI gave about 25 on its own.
I like what I've done, but wanted to be honesty about how much volume it adds, it seems like some people have said "it's only a little bit louder" but I don't think it's THAT tiny an increase.
Unfortunately, (being a musician
Who said I was picky?? (butt)
Well, to make it clear, removing the resonators does not mean HP increase. However, it helps more in exhaust flow and it is mostly to take the muffle noise away from your exhaust. I have a TBE exhaust setup, without the resonators and muffler, just muffler tip and the car sounds mean as F****. It has a nice grumple to it and yes you can almost compare it to an sti sound. The mazda has a very distinctive sound compared to the sti & srt4 when having a free flow exhaust. I enjoy the sound of my little beast. All I can say is V8's don't sound to intimidating anymore, the 4 cyl mazda sounds just has mean and nice also.
I will try to post up some video/sound clips of my car in WOT, idle, & revs. That would be after I put in my new turbo. E.T.A- 2 weeks.
Did you do it step by step (downpipe then exhaust, or all at once)? If so, how much volume gain from downpipe to full exhaust?
Btw, looking into a FMIC too, yours looks hot, which one is it?
MS3_Kendall
Member
- :
- 2007 Mazdaspeed 3
I started with a catback exhaust (no resonators, no muffler) and then DP. I noticed a good amount of power low end with just the catback. I believe I dyno'd 275WHP and 291WTQ (inatke, 17-18PSI, catback). After installing the DP, I dyno'd the car immediately which I regret because I had just literally finished installing the DP and did not give the car (ECU) a chance to learn the exhaust flow, also reseted the ECU which makes your car act funny for a couple of miles. I believe I dyno'd then 285-290WHP & 300WTQ (FMIC kit w/ram air intake (TM replacement), 17-18PSI, & TBE).
I had many things going against me on the last dyno I did. I just finished installing the DP, reseting the ECU, it was 97 degrees w/ 48% humidity, and I had boost leaks with the FMIC kit. I still needed to adjust the t-bolt clamps because the company sent me the wrong size. I had worm hose clamps at the time, which sucked big time. Hopefully after installing the turbo, I will re dyno the car. I should be able to eclipse the 300WHP range if not really close with simple bolt-ons. Keep in mind that I still have not tune.
By the way, the FMIC is from Corksport.
Also, I have a Corksport DP. The design of the DP is slightly different from the other DP out for the MS3. It has a smaller bell mouth that connects to the turbo. It is joint with two tubes making it to one end point. I am not sure if I explained myself well. The fact is I believe that the CS DP are not producing a whole lot of power compared to other DP (ex: TXS DP). I did talk to the techs of CS about the small HP gains with the DP and they did mention to me that they were not so satisfied with the DP gains (HP) when they manufactured the DP. However, it is still a great piece to buy don't get me wrong. I just believe if the bell mouth of the DP would be bigger, more air flow would occure, hence helping to produce better HP #'s.
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OK just went and got an estimate at a muffler shop for deleting the two resonators and replace with straight pipe and they told me $100, Is that to steap?? Some of you stated that it was like $50 or $60. Was that for just one or two deleted? Also I am running SU testpipe and stock downpipe so it should sound pretty sick!
I paid $195 to have a professional race car oriented exhaust shop remove the stock DP and cats, install the Turbo XS catless DP/RP, to have a third reso installed in the middle of the RP, to cut off the stock exhaust tip and weld in a more stealthy and smaller thin walled stainless tip.
I guess it depends on where you live and what you are willing to pay. Sounds like you are getting ripped off.
Sorry, but I can't draw that "obviously" conclusion from your post. You changed more than one thing before you dynoed. The CAI is known to be worth at least 15-20 whp, and you added it at the same time before you dynoed.
The catless DP/RP into the stock CBE is quite a bit louder than completely stock. Those cats do reduce sound volume. The thing not only got loud but boomed badly, droning at 60 mph so bad I got a headache driving to work and back each day. I ADDED a third reso - a very big 3 inch straight through design (see sig) in the middle of the RP and everything really changed for the better, even quieter than stock. More imporantly the exhaust is more European and less rice, much more -- refined sound with no appreciable loss in power.
I can now consistently hit 100 mph in the mid 11 second range and run 13.5 quarters at 107 (one 13.4). Look up comparisons to see what kind of power it takes to hit 100 in the mid 11's. We're talking about knocking off two full seconds or better from stock. Messing with the resos or muffler is not going to make your car faster or quicker. That ain't where the problem is located.
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AIGHT!, I went to another place yesterday and got both the resonators deleted for $50. I am very happy with the results!!! SOUNDS VERY MEAN!!! Screw paying $500 for an after market cat back exshaust. My set up = Stock downpipe>SU testpipe>straight pipe(2 resonators out)>stock muffler. (headbang)
