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Tuna Can Muffler

rondofj

By rondofj,
in Engines & Forced Induction

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rondofj Veteran

rondofj

Posted
Posted

Well, umm not really a tuna can, but pretty close - thats my largish canon..

Just thinking of getting an oval XForce rear muffler on my R34GTT to replace the current 5" or something canon which is too loud for me. Have a full 3inch zorst all the way from turbo, 3" high flow cat, 3" oval resonator, then 3.5" pipe (I would rather have this as 3") then the canon.

I would like to have a nice quiet exhaust which is still a little bit louder than stock and gives that awesome sweet RB sound when booted. Definitely a lot less loud then my canon so I'm going for an oval muffler. And it must be FREE FLOWING.

Could anyone please give their opinions on the 3 options I have below, I like the look of the twin tip with the tapered pipes.

Which one would you go for? Please vote or whatever.. Does the twin tip mufflers restrict the 'free flow' a bit?? Please help..

thanx RON :)

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ClutchBurndout-:( Grand Master

ClutchBurndout-:(

Posted
Posted

imo the first one looks best, free flowing just means a straight through muffler, easily noticed by looking in the muffler.

i have an xforce canon, i dont know if the canons have the same sound as the ovels but i find the xforce is to deep and drony, not my thing

R31Nismoid Grand Master

R31Nismoid

Posted
Posted

Problem you have is not just the rear muffler.

The resonator is not helping either, they are near on useless.

To have a nice quiet exhaust, you need TWO mufflers of decent size.

Free flowing is simple enough, just look inside it. If its straight, its free flowing.

ClutchBurndout-:( Grand Master

ClutchBurndout-:(

Posted
Posted
Problem you have is not just the rear muffler.

The resonator is not helping either, they are near on useless.

To have a nice quiet exhaust, you need TWO mufflers of decent size.

Free flowing is simple enough, just look inside it. If its straight, its free flowing.

just on the offtopic for 1 sec

r31nismoid, im running 1 hotdog in my system with the end canon, its a bit to deep of a exhaust note at the moment and i would like it a touch louder, what would taking the hotdog out do? the hotdog is about 4.5" to 5.5" ??? (its a 3.5" zorst r33)

R31Nismoid Grand Master

R31Nismoid

Posted
Posted

Probably just increase the drone, tad louder, nothing massively, but noticeable.

Given your exhaust is probably already 94dB+

Go clean your ears out of drive around with the windows down. Its plenty loud enough and enoough to have a nice defect/EPA :)

rondofj Veteran

rondofj

Posted
  • Author
Posted

R31 Nismoid, are you sure that I need to run TWO mufflers to remain quiet? Well the factory muffler is the quietest of the bunch and its only one muffler and one resonator isn't it?

So would the xforce oval mufflers listed above in first message make a nice difference (quieter) compared to a largish canon? I like the twin tip tapered muffler, not sure if it would reduce power mmuch... :)

cheers Ron

R31Nismoid Grand Master

R31Nismoid

Posted
Posted
R31 Nismoid, are you sure that I need to run TWO mufflers to remain quiet? Well the factory muffler is the quietest of the bunch and its only one muffler and one resonator isn't it?

Is the factory 3" with a 3.5-4" cat? No :)

Larger diameter, freer the flow - the more the noise. Therefore you need mufflers.

So of course the factory pea shooter is going to be much quieter.

Obviously getting rid of the cannon will make a difference, however you might find it's not enough.

So im setting the expectation that you'll need more than just that as honerstly i think you will.

Everyone definition of "quiet" is different, so if you want something that is under say 90dB (which is a legal requirement), 9 outta 10 times you'll need dual muffler setup for 3" exhausts.

rondofj Veteran

rondofj

Posted
  • Author
Posted
Is the factory 3" with a 3.5-4" cat? No :D

Larger diameter, freer the flow - the more the noise. Therefore you need mufflers.

So of course the factory pea shooter is going to be much quieter.

Obviously getting rid of the cannon will make a difference, however you might find it's not enough.

So im setting the expectation that you'll need more than just that as honerstly i think you will.

Everyone definition of "quiet" is different, so if you want something that is under say 90dB (which is a legal requirement), 9 outta 10 times you'll need dual muffler setup for 3" exhausts.

Thanks R31 Nismoid, would you suggest a 3" free flow lukey oval muffler to replace my resonator beside the diff and the external muffler can be an xforce twin tip with the tapered tips (pic 2).. I'm just worried that the splitting into 2 tips will kill power a bit?

If u know a cheap muffler shop in Sydney that would be really helpful...............

cheers.... :)

simpletool Mentor

simpletool

Posted
Posted

You might want to go to a twin 2.5". More muffler surface area per flow area means quieter with good flow.

A truly good muffler 3" muffler with resonance chamber should do the trick for you though. There is 3" straight through, and there is 3"inch appears to be straight through - different things!

R31Nismoid Grand Master

R31Nismoid

Posted
Posted
Thanks R31 Nismoid, would you suggest a 3" free flow lukey oval muffler to replace my resonator beside the diff and the external muffler can be an xforce twin tip with the tapered tips (pic 2).. I'm just worried that the splitting into 2 tips will kill power a bit?

If u know a cheap muffler shop in Sydney that would be really helpful...............

cheers.... :)

NFI mate, my mufflers are custom made to suit (ie, big as possible).

twin tips wont pose a problem, plenty of systems out there with twin tips and perfect flow

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