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Sound Control Exhausts

scotty nm35
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ironpaw Veteran

ironpaw

Posted
Posted (edited)

Was having a read in the Vic EPA thread...

Are the JASMA exhaust (Legalis/Kaki/Blitz etc etc) all rated under 89db @ say, 4-5krpm?

Seems like with the RB's EPA is testing the noise @ a certain RPM and people are failing left and right....so being under 89db at idle doesn't help...:dry:

Not interested in getting defected again...so yeah, just curious...

Edited by ironpaw
PN-Mad Grand Master

PN-Mad

Posted
Posted (edited)

Yeah, as I was saying; they seem to be well clued up on them over here, and they're really starting to target them.

Which is outrageous considering the standard muffler is variable too. Don't get me started on the HSV's, and the italians that have these "sports exhausts" from factory which would never get down to 90db with the valve open.

I'm fortunate- Mine is quiet ~90db. I have no idea if it flows heaps- Scotty might know- didn't you have a fujitsubu?

Exhaust looks the goods Scott. Hope 11's come your way! Think I'm in for a mid 13. Have to go check it out soon.

Ironpaw- FYI a bone STOCK R32 GT-R fails the EPA test on noise. Our get out of jail card is that I bet they haven't done a mean brake power reading or whatever its called on our cars- so for a 6 cylinder they default to 3600rpm or something like that. RB26's have to be tested at 5600rpm or something relatively quite high. Thats why they fail.

Edited by PN-Mad
ironpaw Veteran

ironpaw

Posted
Posted

Which is outrageous considering the standard muffler is variable too. Don't get me started on the HSV's, and the italians that have these "sports exhausts" from factory which would never get down to 90db with the valve open.

I'm fortunate- Mine is quiet ~90db. I have no idea if it flows heaps- Scotty might know- didn't you have a fujitsubu?

Exhaust looks the goods Scott. Hope 11's come your way! Think I'm in for a mid 13. Have to go check it out soon.

Ironpaw- FYI a bone STOCK R32 GT-R fails the EPA test on noise. Our get out of jail card is that I bet they haven't done a mean brake power reading or whatever its called on our cars- so for a 6 cylinder they default to 3600rpm or something like that. RB26's have to be tested at 5600rpm or something relatively quite high. Thats why they fail.

For real? WTF is the user supposed to do?

iamhe77 Grand Master

iamhe77

Posted
Posted

Was having a read in the Vic EPA thread...

Are the JASMA exhaust (Legalis/Kaki/Blitz etc etc) all rated under 89db @ say, 4-5krpm?

Seems like with the RB's EPA is testing the noise @ a certain RPM and people are failing left and right....so being under 89db at idle doesn't help...:dry:

Not interested in getting defected again...so yeah, just curious...

LOL, no.

Jasma compliance means the exhausts have to under 95dB.

PN-Mad Grand Master

PN-Mad

Posted
Posted

Yup. Claim it was complied into Australia that way? idunno.

Bob- the bloke with the impossibly showroom ADM R32 GTR said somewhere they had to mod the aus spec cars exhausts because they were too loud!ohmy.gif

Daleo Grand Master

Daleo

Posted
Posted

Which is outrageous considering the standard muffler is variable too. Don't get me started on the HSV's, and the italians that have these "sports exhausts" from factory which would never get down to 90db with the valve open.

I'm fortunate- Mine is quiet ~90db. I have no idea if it flows heaps- Scotty might know- didn't you have a fujitsubu?

Exhaust looks the goods Scott. Hope 11's come your way! Think I'm in for a mid 13. Have to go check it out soon.

Ironpaw- FYI a bone STOCK R32 GT-R fails the EPA test on noise. Our get out of jail card is that I bet they haven't done a mean brake power reading or whatever its called on our cars- so for a 6 cylinder they default to 3600rpm or something like that. RB26's have to be tested at 5600rpm or something relatively quite high. Thats why they fail.

Yep; totally with you on that, it's fine to have a "loud" override button on your Bi-modal Maserati or your Bogandore; but if you do it on anything else you're a criminal.:rolleyes:

Like you'd ever have it on quiet.:whistling:

Might have to give the sound meter widget on my phone a go; I'm curious now...

Should we try to do a WSID Stagea meet sometime soon? I'm keen to get down again; just need it to stop raining for a few days...pinch.gif

PN-Mad Grand Master

PN-Mad

Posted
Posted

Yep; totally with you on that, it's fine to have a "loud" override button on your Bi-modal Maserati or your Bogandore; but if you do it on anything else you're a criminal.:rolleyes:

Like you'd ever have it on quiet.:whistling:

Might have to give the sound meter widget on my phone a go; I'm curious now...

Should we try to do a WSID Stagea meet sometime soon? I'm keen to get down again; just need it to stop raining for a few days...pinch.gif

Put it on a milk crate (or something similar height to exhaust) @ 45 degrees from your exhaust outlet at a distance of 0.5 metre.

http://www.ntc.gov.au/filemedia/Reports/NatStatExhaustNoiseTestSept2006.pdf

Down like a clown for WSID- propose a date, make a thread, and we'll see if we can get some interest!

I know there is a SAU NSW WSID day sometime this year, but I don't need more than 3 runs- flogging the car all day doesn't really appeal to my mechanical sympathy wub.gif

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