Jump to content
SAU Community

Recommended Posts

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

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

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?

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.

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

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

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

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now


  • Similar Content

  • Latest Posts

    • I appreciate the detailed explanation, think I understand now. I spent the better part of last night reading what I could about shuffle and potential solutions. I had replaced the OEM twin turbo pipe with an alternate Y pipe that is separated further away from the turbo. The current one is from HKS and I had a previous pipe that was separated even further away, both have shuffle. I had heard that a divider can be welded in to the OEM pipe to remove turbulence, and figure that aftermarket pipes that are more separated would achieve the same thing. From what I read, most people with -10 turbos get shuffle due to their size, though it's a bit less common with -5s on a standard RB26. I think Nismoid mentioned somewhere it's because OEM recirculation piping is common in Australia with -5 cars. It seems that the recommendation tends to vary between a few options, which I've ordered in what I think is most feasible for me:  1. Retune the MAP or boost controller to try to eliminate shuffle 2. Install OEM recirculation piping 3. Something called a 'balance pipe' welded onto the exhaust manifolds. I don't know if kits for this are available, seems like pure fabrication work 4. simply go single turbo My current layout is as follows: Garrett 2860 -5s HKS Racing Suction intake MAF delete pipes HKS racing chamber intake piping hard intercooler piping,  ARC intercooler HKS SSQV BOV and pipe Haltech 2500 elite ECU and boost solenoid/controller HPI dump pipes OEM exhaust manifolds HKS VCAM step 1 and supporting head modifications Built 2.6 bottom end All OEM recirculation piping was removed, relevant areas sealed off I'll keep an eye out for any alternative solutions but can get started with this.  Only other question is, does shuffle harm the turbo (or anything else)? It seems like some people say your turbo shafts will explode because of the opposing forces after a while and others say they just live with it and adjust their pedal foot accordingly. 
    • That worked out PERFECTLY! Thank you big time to JJ. He was able to swap me his stock diff. He drove all the way to me as well. Killer! Removal & install was pretty straightforward. The diff itself is HEAVY. So that’s a 2 man job.  Man does the car drive nice now! Couldn’t have worked out any better 👌
    • I'm interested,do you still have it?
×
×
  • Create New...