Is there any downside of performance if I have the resonator cut out of the factory exhaust and replace it with a straight pipe? All I'm trying to accomplish is a bit more sound from the exhaust, without loss of power or performance. Any advise would be appreciated. btw, I want to stay stock, no aftermarket exhaust. Thanks in advance.....

 

you're taking out a restriction... how could is make you lose power?

 

https://honda-tech.com/zerothread?id=1504933

 

What is the inside of the stock muffler like? Is this a twin loop type of system or are there baffles?

 

That's great, But I already know that it CAN be cut out. What I want to know is the effects, if any, on performance or mpg.

 

I'm not sure, but it's most likely a 2 or 3 chamber muffler, why?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by TL1000R &raquo;</TD></TR><TR><TD CLASS="quote">That's great, But I already know that it CAN be cut out. What I want to know is the effects, if any, on performance or mpg.</TD></TR></TABLE>

performance gains questionable.....

it does bring the exhaust note up a level.....

if it gives any gains the only way to measure would be on a dyno, and that might not show an accurate representation, with all of the variables

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by cmdr430 &raquo;</TD></TR><TR><TD CLASS="quote">

performance gains questionable.....

it does bring the exhaust note up a level.....

if it gives any gains the only way to measure would be on a dyno, and that might not show an accurate representation, with all of the variables</TD></TR></TABLE>I'm not really looking for gain, it's loss I'm concerned about.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by TL1000R &raquo;</TD></TR><TR><TD CLASS="quote">I'm not really looking for gain, it's loss I'm concerned about.</TD></TR></TABLE>

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Mike C &raquo;</TD></TR><TR><TD CLASS="quote">you're taking out a restriction... how could it make you lose power?</TD></TR></TABLE>

 

Does anyone have a sound clip or an idea of the sound difference?

 

Your not going to gain any power and your car will sound like ****. Yes, it will increase noise levels but they are not the kind of noises you want to bring out. Believe me, the resonator is there for a reason:

Often times a single muffler design can not eliminate all sound frequencies so cars use both main mufflers and resonators. Most of the time the resonator is just a straight through perforated core muffler which does not affect flow.

A car without a resonator sounds really raspy and has rattles in the exhaust ; the resonator also absorbs a lot of vibration.

Keep your exhaust intact, all the good sounds come from the intake anyways

 

Maybe if all you are looking for is a little more sound, a used average exhaust would be the way to go. Does not need to be a T1R or something like that, b/c hp gains are not the goal.

on the intake. Maybe a V2 (good sound, ~ same hp, less $$) would satisfy your need for more volume?

 

I'm not sure, but it's most likely a 2 or 3 chamber muffler, why?


Some of the Mustang guys have thier stock mufflers opened up, gutted, then re-welded. I was wondering if it would help the factory mufflers on our cars to do the same. Just thinking of other ideas or approaches to mods.

 

its a twin loop

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Jamez &raquo;</TD></TR><TR><TD CLASS="quote">Your not going to gain any power and your car will sound like ****. Yes, it will increase noise levels but they are not the kind of noises you want to bring out. Believe me, the resonator is there for a reason:

Often times a single muffler design can not eliminate all sound frequencies so cars use both main mufflers and resonators. Most of the time the resonator is just a straight through perforated core muffler which does not affect flow.

A car without a resonator sounds really raspy and has rattles in the exhaust ; the resonator also absorbs a lot of vibration.

Keep your exhaust intact, all the good sounds come from the intake anyways </TD></TR></TABLE>

Have you actually done this mod? It sounds like your impressions are based on hearsay. I had my resonator removed on my 2005 GPW and it simply sounds a little bit louder in terms of exhaust sounds. There is NO rattling or additional vibration. It doesn't sound like **** either. I think it sounds quite nice for the $45 that it cost me to pay the exhaust shop.

FYI--the resonator doesn't prevent rattles in the exhaust. It's not even physically touching the car except for the hanger. It only amplifies or reduces certain frequencies of sound waves/exhaust pulses. If you had a bad cat or rattles to begin with, it would increase the rattles. Otherwise, simply removing the resonator only makes this particular exhaust louder with a slight associated rasp. YMMV.

If you have done the mod, maybe we just have different tastes about what sounds good.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Mike C &raquo;</TD></TR><TR><TD CLASS="quote">you're taking out a restriction... how could is make you lose power?</TD></TR></TABLE>
Go take a stock S2k and remove the header. Then dyno. I'll bet that it'll be less restrictive and less powerful. Wiseguy. Exhaust flow on N/A cars is not as straight forward as with a turbo car.

 

Boonielander, i think we are dying for sound clip and dyno

 

Search "Resonatorectomy" on S2ki.com, you'll come up with a couple sound clips.

I did this mod. You will not gain any performance from it. The resonator is not a restrictive muffler-type resonator, it's a baffle. You can see straight through the resonator. I would bet money you will not see any measurable horsepower gains on a dyno.

The sound it produces is nice though. It doesn't sound too much different than stock, just a tad louder. You can actually hear the mufflers. I eventually went with a single exhaust, but the resonatorectomy served me well for the short time I had it.

Just make sure you use 304 stainless piping, 2.5", with sleeves on the end so it wraps around the stock piping.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by boonielander &raquo;</TD></TR><TR><TD CLASS="quote">

Have you actually done this mod? It sounds like your impressions are based on hearsay. I had my resonator removed on my 2005 GPW and it simply sounds a little bit louder in terms of exhaust sounds. There is NO rattling or additional vibration. It doesn't sound like **** either. I think it sounds quite nice for the $45 that it cost me to pay the exhaust shop.

FYI--the resonator doesn't prevent rattles in the exhaust. It's not even physically touching the car except for the hanger. It only amplifies or reduces certain frequencies of sound waves/exhaust pulses. If you had a bad cat or rattles to begin with, it would increase the rattles. Otherwise, simply removing the resonator only makes this particular exhaust louder with a slight associated rasp. YMMV.

If you have done the mod, maybe we just have different tastes about what sounds good. </TD></TR></TABLE>

Yes, I have actually done this. I removed it when I had my old D16Z6 engine and I have also heard it done on a classmate's Chevy Beretta (that one was actually the cat but it serves the dual purpose of a resonator as well on these cars). In both cases the muffler's sheet metal would vibrate and rattle at certain RPMs and the sound was just awful. Right now I'm driving with a burnt out Cherry Bomb replacing the resonator (might as well not be anything there at all) on my B16A and it still sounds awful. This is not hearsay, I have to deal with this stupid exhaust everyday until I can replace it this spring

 

Some of you guys might be mistaken on what is the resonator. The pipe that sticks out the side is the resonator, the actual first can that's there is the presilencer. The difference between the two is that the resonator is not packed with any sound dampening material; it is just an expansion space to cancel out certain frequencies. The presilencer does the quieting.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ProjektSlideways &raquo;</TD></TR><TR><TD CLASS="quote">Some of you guys might be mistaken on what is the resonator. The pipe that sticks out the side is the resonator, the actual first can that's there is the presilencer. The difference between the two is that the resonator is not packed with any sound dampening material; it is just an expansion space to cancel out certain frequencies. The presilencer does the quieting. </TD></TR></TABLE>Okay, so the can that looks like a small cat. and is located before the split to the mufflers is the presilencer? How does it sound to remove it instead of the resonator?

 

I'm guessing a bit throatier and louder. On a stock exhaust with 2 twin-loops, it won't be much. As loud as an invidia or comptech dual, if that.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ProjektSlideways &raquo;</TD></TR><TR><TD CLASS="quote">I'm guessing a bit throatier and louder. On a stock exhaust with 2 twin-loops, it won't be much. As loud as an invidia or comptech dual, if that.</TD></TR></TABLE>In your opinion, doing so wouldn't impede performance would it?

 

BUMP

 

No bumping in the Tech forums please.

Performance wise, you might be able to gain some throttle response. I don't suspect any losses though, so go ahead with it, but don't forget to update us with results/pics.