Need Help With "controllable" Exhaust/muffler

[Japav]

Hey V owners,

Thinking of first mod on the GT8 for the 'sound' system, need some help here to get start

Wanna add some evil feeling on the car with exhaust mod....

Considering the noise pollutions in the quite neighbourhood, looking at some 'controllable' muffler to do both at diff situation

Been looking at the XForce Varex - price range from 399+ on ebay...

and they've got store in Nunawading VIC~

Anyone got/seen one of this kind muffler before?

If so what would you rate the product in terms of the difference with the loud/quite.

Cheers

[dannyw]

youtube.. search for videos for it. very different with full open, half and closed.

[Japav]

also any idea how long will get it fit on the car?....and roughlly the price to get it done?

does new pipes required?

Any1 can refer caryard in Melb eastern suburb(Doncaster, Box Hill area)

Cheers

[scathing]

A mate had one on his S14.

With the valve closed, it was as quiet as stock but on his FI car he lost like 20rwkW compared to when its open. When open, it wouldn't be noise legal.

[dannyw]

lolz, not to forget, it is already illegal to put it onto the car..

pretty sure, coz u r in vic.. no controllable allowed~

*but it isnt likely the popo can find out? hrrmmm

A mate had one on his S14.

With the valve closed, it was as quiet as stock but on his FI car he lost like 20rwkW compared to when its open. When open, it wouldn't be noise legal.

[scathing]

The illegality of the active muffler comes from it being user controllable. If you have it completely automated, and only set to open at a legal point, then technically it should pass (which is how all those modern supercars meet ADRs with their active mufflers)

Hyperflow sells a (very expensive) butterfly valve with control unit that allows for tunable automation. If you don't install the in-cabin switch and set it to completely automatic, technically you could get it engineered if its tuned correctly.

[dannyw]

The illegality of the active muffler comes from it being user controllable. If you have it completely automated, and only set to open at a legal point, then technically it should pass (which is how all those modern supercars meet ADRs with their active mufflers)

Hyperflow sells a (very expensive) butterfly valve with control unit that allows for tunable automation. If you don't install the in-cabin switch and set it to completely automatic, technically you could get it engineered if its tuned correctly.

but who will b willing to spend that amount of money for just engineering? Unless you can do it yourself...

[Japav]

but who will b willing to spend that amount of money for just engineering? Unless you can do it yourself...

its depends on how u define 'expensive'~

i just got mine fitted with xforce Varex muffler...gotta say 'ITS AWESOME'.

need to get my cam charge up for demo on youtube~

but still got some dodgy pipe work on it from mechie who never seem a V before, so i guess the sound still with-in the 'legal limit' (85dB?).

Compare with the stock muffler it does sound much better, and the sound on 'close' is almost the same, prob just slightly, very slightly louder than stock~

[dannyw]

it is not about the noise legal limit, check again, it is about the 'control-able' of the muffler that makes it illegal

the varex isnt expensive i know of course.... but read bout Alan's better idea-automatic stuff.. =engineering..

[scathing]

but who will b willing to spend that amount of money for just engineering? Unless you can do it yourself...

Someone who wants to modify their car legally? Doing something properly, and ensuring that its road legal, has always been more expensive than a slap-dash job.

Compare with the stock muffler it does sound much better, and the sound on 'close' is almost the same, prob just slightly, very slightly louder than stock~

So it's illegal then, putting your setup outside the scope of our discussion.

The ADR is that the car at its loudest possible, user-controllable, state is how they test it. If you ever get pulled up for a proper noise test, they'll test it with the valve open if you can open it in-cabin. If its pretty much stock volume closed, then from my experience with the Varex mufflers there's no way it's going to be legal open.

Edited April 18, 2009 by scathing

[dannyw]

as ALAN explained... i think u still don get wat we r trying to say..