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Performance Exhaust Vs Epa Legal Noise (92db) !

GTR34-Vspec
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GTR34-Vspec Apprentice

GTR34-Vspec

Posted
Posted

Hi all, my mate just got a yellow conairy by the men in blue for exhaust noise in his r33 gts-t. It's an 3'' from the turbo down, hot dog resonator and cannon type muffler. My mate and I didn't believe it was illegal, because it still quite compares to the others around. We took a day off, went to EPA to test it out. The result was 93db !!! watdaaa !!! :)

Well, my question is, how do the others get away with their systems ?? or how many day off they have to take just to (1) remove the illegal ones => (2) fit back the standards => (3) show EPA => (4) fit back the illegal ones => (5) get pull over => and back to step (1). sighhhhh...

Actually, im looking for a legal 3'' system from the turbo down (with dump pipes) which produces reasonable power and note. But so far, some said it can't be legal with 3'' systems in the GTRs, because they are even noisier than the GTS-Ts.

Well, if any of you using a legal 3'' system, please reccomend me and how many KW should i get ??

THANKS !!!

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RBFIRE Experienced

RBFIRE

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Posted

can u get a silencer to pass the epa?

i got on my 3.5" hks stainless,

i duno how loud it is but got defected as well, but well, my mechanic passed me,

hehe

soo yea, u just need to know some ppl...

silencer helps. then take it off.

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siksII Grand Master

siksII

Posted
Posted

it depends what u mean by silencer, it has to be permanent so nothing that just bolts in, ie those silencers that come with xforce exhausts wont do the job.

if u weld in another muffler that makes your exhaust quiet then that is fine.

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ctjet Grand Master

ctjet

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if you dont like that idea ^^^^

buy a second hand standard exhaust from cat back and if you get done then just swap over exhausts for the epa and swap it back wen you get home

you can do that as much as u like, i do!! bummer is the epa guys no me pretty well now.... say hi for me next time your down

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Savage Bliss Proficient

Savage Bliss

Posted
Posted

Had my R32 tested just recently. I've got 3 1/2 from turbo back, with cat. Thought it might be wise to put the silencer back on before I drove it up there. Pulled in the drive and the boys laughed at me.

So anyways, took to it to a mate and we put on a standard exhaust from a car just in from Japan, went and got it tested and just passed with 91. Now, what they also take into account is the engine noise. What mods has he had done under the bonnet?

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33GTT Collaborator

33GTT

Posted
Posted
Had my R32 tested just recently. I've got 3 1/2 from turbo back, with cat. Thought it might be wise to put the silencer back on before I drove it up there. Pulled in the drive and the boys laughed at me.

So anyways, took to it to a mate and we put on a standard exhaust from a car just in from Japan, went and got it tested and just passed with 91. Now, what they also take into account is the engine noise. What mods has he had done under the bonnet?

Yep, many moons (about25 years) ago I was pulled over by the epa and had my 4 cylinder morris tested,,they put a mic on the exhaust and one on the engine,,

now my car at the time had twin 1 and 3/4 inch SU's and it blew a healthy 115 db,,

they told me to get it fixed and get it retested or i would be fined,, so I put on a stock exhaust, took it down, they put a mic onto the exhaust but not the engine, and then passed the car,, two weeks later I got the fine in the mail anyway,,

pr*^#s,,,

cheers

John

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Savage Bliss Proficient

Savage Bliss

Posted
Posted (edited)
My car has a 3" cat back exhaust, i think its by Fujitsubo or someone. Anyone know if it'll be under 92db? Can i get it tested without fear of being defected?

Whom ever does the test can't legally book you. You can drive in and have the test done and drive out, all they can do is reccomend you have it done. The booking has to come from the Police or EPA equilvalent.

p.s. you won't pass.. :P

Edited by Savage Bliss
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insu Rising Star

insu

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Posted

There's a method of passing noise tests at defect stations involving steel wool and chicken wire.

You have to be careful about how you mount the wire in the exhaust though. One of my friends tried this when he had been pulled over and had been told to go to pineapple street (Lancer Gsr), revved the car too hard on the way there and shot the wire out the exhaust. Ended up pulling around 95db from memory.

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