Custom Split Exhaust System

[futurewa]

Hey Guys

I got my dream car but it's far too loud!

Some specs -

TRUST extended split dumps

EXHAUST TECHNOLOGY custom twin system with Apexi valve and custom cross over pipe...

Pic of split System

Pic of tail pipes

What is my best option for quitening the car down without ruining the performance?

I'd also prefer to keep the tail pipes rather than go for a single big drain pipe.

Thankyou..

Edited November 28, 2007 by futurewa

[R31Nismoid]

Get some decent mufflers mate, looks like you have two pissy cannons and thats it.

Which basically wont do anything... ! One of my mufflers is probably better than the two you have.

The cross-over's purpose doesnt reduce noise either, so not sure why you mentioned it

I have the same from section as you (Trust extensions), two BIG custom mufflers, 94dB 3.5" all the way and will flow over 350rwkw.

Done and dusted

There have been a few "exhaust noise" threads now, and ive posted pics of mine in there 2-3 times so have a search if you want a visual.

[Adz2332]

is that on a 32?

[1400r]

Im guessing 32 gtr?

[skiwhine]

nice exhaust man, worksmanship on the crossover is great

[EVIL TWIN]

You'll need a couple (one for each pipe) of centre mufflers or silencers/resonators. That's the only way you'll get it quieter without changing the rear mufflers, which look too nice to change.

[battery]

sorry, but whats the point of the crossover section?

[taynewguy]

Yeah I wouldn't be giving that exhaust up either. Couple of resonators are worth a shot.

[gotRICE?]

sorry, but whats the point of the crossover section?

I think it has a similar effect to a balance pipe in v8's.

If you didnt have it it would be like having two 4cylinder motors creaming their balls off, and you would loose the V8 grumble.

And in this case, two 3cylinder turbo motors.

I wonder what that would sound like

[STATUS]

The cross-over's purpose doesnt reduce noise either, so not sure why you mentioned it

it does actually but your right those rear mufflers wont control the noise, must admit though marky mark is without a doubt the best exhaust shop in aus. im sure if you go back and say i want it quieter he will do it.

i wish i had the oppurtunity for him to do my ltd exhaust he has done plenty of work for me in the past and shits on anything else i have seen from anywhere.

[Adz2332]

I think it has a similar effect to a balance pipe in v8's.

If you didnt have it it would be like having two 4cylinder motors creaming their balls off, and you would loose the V8 grumble.

And in this case, two 3cylinder turbo motors.

I wonder what that would sound like

Yer to start off wid in my torana i had a twin exhaust and it didnt crossover and it had a reali bark sound to it.. sounded reali bad especially when reving up higher... then it was rewelded with a cross over, it lost the bark sound and made the lower V8 rumble stand out more... is beautiful

[s13_Skyline_inside]

not a 100% sure but the purpose of the balance pipe on a v8 is to balance the back pressure between the two banks, so its not needed on a turbo car as the turbo's create the back pressue for the engine, not the exaust

but the system looks good, id just chuck a muffler on each side, should quiten it down a bit

[R31Nismoid]

You'll need a couple (one for each pipe) of centre mufflers or silencers/resonators. That's the only way you'll get it quieter without changing the rear mufflers, which look too nice to change.

silencers/resonators wont do a thing.

[R31Nismoid]

The cross over is something alone the lines of below, its probably not exact, but yeah... just a starting point.

To even the exhaust pulses/tone. (nfi the true term)

If you have 3 cylinders, and then 3 all the way to the rear without crossing, it sounds retarded as its not even (ie all 6).

So the cross-over lets this occur and giving it a good sound

That said, i had a ZJ fairlane many years ago no balance pipe and it sounded good.

[wiplash1]

ET did an awesome job as always!

[SirRacer]

ive got a 3.5inch system in the build with cannon and am struggling to find any 3.5 inlet mufflers without paying 500 each

[futurewa]

Yep, it's a GTR R32.

Ok, so it seems that I need to replace the existing mufflers with 2 decent big ones. The guy at the exhaust shop wanted to put in a single big muffler in the middle where the crossover is. Will that make the car sound wierd?

[R31Nismoid]

ive got a 3.5inch system in the build with cannon and am struggling to find any 3.5 inlet mufflers without paying 500 each

good mufflers cost money.

[futurewa]

Nismoid, what do you think of the centre muffler idea as opposed to your two new rear mufflers?

[DCIEVE]

nice looking exh....are you running cats? (i found one cat was enough in addition to a shitty cannon to get my 26 quiet enough to go over the pits) otherwise some chambered mufflers somewhere in the middle will do the job.

sir racer; I had the same issue and ended up going with a custom made 4" muffler.... couldnt find a 3.5" anywhere (3.5" thin wall stainless is not an easy thing to find either - i ended up paying double for a 3.5" bend what i coudl get a 3" one for, sort off explains the lack of local 3.5" mufflers also)- cheaper in the end to go 4" if there was the room