Making Exhaust Quieter Without Comprimising Flow.

[NYTSKY]

Ok i got my exhaust tested for DB and it was 4db over.How can i make it quieter without comprimising flow.

I had to put a standard one on my r33 to pass a defect but i dont want to get pulled over again for my other exhaust.The standard one has robbed me of so much power.

People keep talking about the HKS dragger systems but are they 90Db?

CHEERS

[paulr33]

run a twin 2.25" in system

[R31Nismoid]

4db over is just a rear muffler... just get one that is quieter.

talk to an exhaust place. there will be something on the market

[Zas)-(]

i just cleared my defect same one a week ago

best thing is trying to get a muffler at the end with a silencer and see if that quietens it down but opt for expensive mufflers that does reduce sound no china made crap.

otherwise either way you'll lose power....

maybe other guys have ideas but its a bitch

[saliya]

Ok i got my exhaust tested for DB and it was 4db over.How can i make it quieter without comprimising flow.

I had to put a standard one on my r33 to pass a defect but i dont want to get pulled over again for my other exhaust.The standard one has robbed me of so much power.

The short answer is "go see a good exhaust shop" - preferably someone that has experience in making race exhausts.

Someone like that will be good at looking what you have and estimating accurately what to do to take out 4dB whilst

keeping as much performance as possible.

The long answer:

How big is the exhaust you have? Anything over 3.5" is hard to shut up.

Does your car have a 'trumpet' on the back can? You might get 1dB by removing it.

How many mufflers? Can you add another? That might get you 3dB back.

Are the mufflers straight-through or otherwise? If straight-through, try a muffler with different internals but same flow area.

Are the mufflers glass-packed? If so, can you repack (usually repacking means 'looser' but can mean 'tighter' depending

on how the internals are)?

Regards,

Saliya

[mad082]

what sort of exhaust do you have? if it is a cannon on the rear, change to an oval rear muffler.

[Nabil]

Ok i got my exhaust tested for DB and it was 4db over.How can i make it quieter without comprimising flow.

I had to put a standard one on my r33 to pass a defect but i dont want to get pulled over again for my other exhaust.The standard one has robbed me of so much power.

People keep talking about the HKS dragger systems but are they 90Db?

CHEERS

NYTSKY... you little adolescent!

I recommend everyone on this forum to steer clear from

trading with this member.

Gave me his word he will buy my SAFC

& make payment 2 weeks ago.

Does not reply to my PM's and has

ruined any other potential buyers as

I refused all other offers after he gave me his word.

Then again, only a real MAN can keep his word!!!

[NYTSKY]

NYTSKY... you little adolescent!

I recommend everyone on this forum to steer clear from

trading with this member.

Gave me his word he will buy my SAFC

& make payment 2 weeks ago.

Does not reply to my PM's and has

ruined any other potential buyers as

I refused all other offers after he gave me his word.

Then again, only a real MAN can keep his word!!!

Sincere apoligies.I have had bit of trouble with the law lately as you can see by my thread so all my money has been tied up in defects.As soon as i have the funds i will pay you in full.I did tell you that i am very interested and i mean it! As soon as my funds are back i will pay you in full garranteed.

I think your actions toward me are a bit harsh.Before you launch such an attack please send me another PM.I always answer my PMs on this occasion i might have deleted yours.

Sorry Bill

CHEERS

Dave

Edited December 23, 2006 by NYTSKY

[Thunderbolt]

ECV (exhaust control valve) should do the job for you.

If you don't know what these are check out the following link:

http://www.importscene.com.au/prod466.htm