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removing centre muffler

2BNVS

By 2BNVS,
in Engines & Forced Induction

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4 Doorz Rising Star

4 Doorz

Posted
Posted

Is your rear muffler straight thru? I have two mufflers - rear one has an S bend in it to help keep down noise, but have set it up so I can take off the rear one at track for less back pressure. If both are straight thru, prolly not much power advantage removing either, (but will sound heaps good) - that is if mid one is like a hot dog, apparently, if it's really big, turbulence may be removed if you take if off and there will be more power there.

2BNVS Veteran

2BNVS

Posted
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Posted

yer the rear is a straight thru, i went and got a quote today on how much it would cost to replace it with a 3'' pipe and was 100 bucks, so ill most likely go thru with it, so when i take it off Zman ill let u know, not sure how much it would be for u to install it on to an existing exhaust, probs round the same as for me replacing it with a pipe...

cheers...ben.

sumfatchin Enthusiast

sumfatchin

Posted
Posted

my old system used to have a center muffler and a rear muffler, first i took of the center one cause it wasnt loud enough, that made a difference, but not enough for passangers to even notice it...

finnally i pulled of the rear muffler and replaced it with a smalish 3 inch cannon muffler, with very little baffling material (whatever its called).

Its definatly alot louder, but the problem with skylines (moreso ones with stock turbos), is that they are impossible to make loud, i got the dude at the exhaust shop to start it up with the system off and it still wasn't all that loud...

improvment in power is very minimal, maby a couple of kws?, but more than likely, you wont notice it.

GILTY Collaborator

GILTY

Posted
Posted

I got mine done aswell, and it cost me $40 as well...$100 is a complete rip off!!!

Mine sounds sweet, a little droney between 2200rpm and about 2500 rpm, but nothing I can't deal with!

The RB series engines sound great, so in my books the louder the better. Sounds gold on full noise whilst drifting with the BOV going off all over the place.

Revhead Grand Master

Revhead

Posted
Posted

I had the same dilemma a while ago - I had a 3" dump, 3" cat, and two straight-through 3" mufflers. I had a shop remove my centre muffler and replace it with a flaged piece of 3" pipe. Also had them make a dropped pipe, which comes out under the passenger seat and eliminates the cat too, for drags etc.

Anyway, after removing the centre muffler, my car was certainly louder and had a deeper note, but doesn't drone and has quite a nice note. With the dropped pipe on, it's not "that" loud at idle, but you can hear the turbo spool from about 1200rpm, and it sounds like a Nascar when the revs build up around 5k :P But yeah, whether it's too loud or not will depend on the muffling qualities of your remaining muffler. Mine seems to have been perfect, yours might make it too loud or too quiet. Just try it and see. Don't expect a massive power difference though.

  • 1 month later...
benm Grand Master

benm

Posted
Posted

Interesting... I too have the 2 mufflers. My exhaust consists of:

3" Custom front/dump pipe -> 3" Cat -> 3" Nismo exhaust with a middle and rear muffler -> 4" Nismo Tip.

I'm thinking of getting this middle muffler cut out and replaced with just a 3" straight through pipe (or possibly getting it done so that i can swap between a muffler or straight through pipe, daily driving vs track/drag).

So about $40 and 30mins and it should be done eh?

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