I have done many searches but can not find this particular answer.

On some of the cat back exhaust systems I have seen, such as the blitz, once the pipe comes to 1 and heads towards the cat there is another piece, kinda like a canister or a muffler (perhaps its a resonator of some sort) So my question is if I bought a cat back system but say took off this piece so from the cat to the mufflers it was just pipe, would I make the car sound louder and beefier? Would there be any losses?

Thanks for your help
JP

 

Will it be louder, yes.
Will there be a loss, possibly:

 

WOW......doesnt look good but what is that from? looks like an HKS system......

JP

 

The cap was taken off during a track event. That's RT's vehicle, he reported a loss of lap times with it off.

 

Oh ok, I would replace the piece I take off with a straight pipe. What is the purpose of these muffler resonator canister things that are located under the car?

JP

 

I beleive that would be a test pipe.

 

Jip69, you are correct, on every exhaust I've seen so far, that piece you describe is a resonator. Essentially, it's a device that cancels out (or at least minimizes) the sound of the exhaust at certain frequencies. If you take it out, would you ultimately get more flow? Probably. But, another thing to consider is that the exhaust engineers put it there to take out droning that can occur at certain engine RPM (usually in the 3000-4000 RPM range) which incidentally, is where most of the driving takes place. I've lived with a droning exhaust before, and believe me, it sucks.

Now take into consideration that removing the resonator will most likely NOT make a difference in power output, and you can quickly see that you might be better off just leaving it on there.

 

Thanks for all the info from both of you. If the cat back isnt enough for me I then may just look into headers...

thanks again
JP

 

On the stock exhaust, there are three noise canceling aspects to it.

First is the little side-pipe that sticks out at a right angle. This is a Helmholtz filter, and cancels out a certain frequency of sound without dampening the flow any. The Amuse dual titanium exhaust is the only aftermarket exhaust I know of that has one.

Second is the resonator - the little canister just past the Helmholtz. Nearly every aftermarket exhaust I've seen has one.

And finally is the mufflers, of Crouse. Some like the J's Racing have a straight through, motorcycle like muffler.

Removing the resonator probably would have an effect on the sound, but never having heard such a setup I cannot predict how it would sound. Removing it would involve cutting the aftermarket exhaust and welding on a replacement pipe. Add that to the cost of the exhaust itself and I think you'll save money by going with a custom setup from the beginning. Purchase some sort of muffler (Supertrapp, whatever) and have a muffler shop custom weld piping from the cat over to the muffler. It would probably be obnoxiously loud...

 

I heard a magnaflow muffler with piping from the cat to the mufflers of just piping....sounded nice as far as quality but as far as how loud I can not really tell cause I heard it over the internet.

JP