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Location:
Hobart
Registered:
August 2004
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170-200dbi MA61
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Sun, 14 November 2004 03:10
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I am just after some surgestions on what size exhaust and extractors i should get cause i want to try to acheive around 200dbi from the exhaust. my mate has a mini which make 190dbi and that is pretty impressive
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Location:
Brisbane
Registered:
October 2002
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Re: 170-200dbi MA61
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Sun, 14 November 2004 03:39
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firstly your mates full of shit  , 150db CAN disrupt the normal beat of your heart and make it convulse {kill you}, and laying under a jumbo on take off is 160 and the space shuttle is 170-180.
there is a silvia track car down south with just a dump pipe on it, and it hit 140db,
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Location:
Kita-Ku, Sapporo, Japan
Registered:
January 2003
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Location:
Hobart
Registered:
August 2004
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Re: 170-200dbi MA61
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Sun, 14 November 2004 03:49
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well he took it to the RACT and had it sound tested and they put a mic 1M away from the muffler and the sheet said 190dbi
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Location:
Brisbane, QLD
Registered:
February 2003
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Re: 170-200dbi MA61
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Sun, 14 November 2004 04:26
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the sound measurment of dB is different to dBi
i only found that out by googeling 
| Quote: |
dBi and radiation that varies with direction
Radiation that varies in direction is called anisotropic: a source that emits sound (or something else) equally in all directions is called an isotropic source. When you want to emit in (or receive from) a particular direction, you want the ratio of intensity measured in that direction, at a given distance, to be higher than that measured at the same distance from an isotropic radiator. This ratio is called the gain; express the ratio in dB and you have the gain in dBi for that radiator. This unit is mainly used for antennae, either transmitting and receiving.
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I Supported Toymods
Location:
Lwr Templestowe, Melbourne
Registered:
August 2004
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Re: 170-200dbi MA61
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Sun, 14 November 2004 04:44
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Dude, don't ruin the Supra by putting on an exhaust thats too loud for it. Just something free flowing that will get you some power increase and a nice note. Thats better than something that'd make lots of noise. Just my 2c.
Yian
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Location:
Brisbane
Registered:
May 2002
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Re: 170-200dbi MA61
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Sun, 14 November 2004 05:44
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| TRD_Celica wrote on Sun, 14 November 2004 13:10 |
i want to try to acheive around 200dbi from the exhaust.
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You are hereby banned from owning a Supra. Go and stand in the corner.
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Location:
c'town, NSW
Registered:
May 2002
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Re: 170-200dbi MA61
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Sun, 14 November 2004 05:50
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should ban him from the forums as well
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Location:
Hobart
Registered:
August 2004
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Re: 170-200dbi MA61
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Sun, 14 November 2004 07:10
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y i want it to b loud there is nothing wrong with that. i mean over all i want performace that is hte main thing. I mean come on guys don't take it the wrong way, but u have to agree a loud car is nice
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Registered:
August 2002
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Re: 170-200dbi MA61
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Sun, 14 November 2004 07:13
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| Norbie wrote on Sun, 14 November 2004 16:44 |
| TRD_Celica wrote on Sun, 14 November 2004 13:10 |
i want to try to acheive around 200dbi from the exhaust.
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You are hereby banned from owning a Supra. Go and stand in the corner.
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I second this. NO SOUP FOR YOU!
| rob_RA40 wrote on Sun, 14 November 2004 16:50 |
should ban him from the forums as well
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I second this too.
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Location:
Hobart
Registered:
August 2004
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Re: 170-200dbi MA61
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Sun, 14 November 2004 07:15
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 bastards
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Location:
Hobart
Registered:
August 2004
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Re: 170-200dbi MA61
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Sun, 14 November 2004 07:16
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| Mr DOHC wrote on Sun, 14 November 2004 14:39 |
firstly your mates full of shit , 150db CAN disrupt the normal beat of your heart and make it convulse {kill you}, and laying under a jumbo on take off is 160 and the space shuttle is 170-180.
there is a silvia track car down south with just a dump pipe on it, and it hit 140db,
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well wat is the deal with sound comps. i was in my mates suzuki swift that pumped 163 db
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Registered:
August 2002
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Re: 170-200dbi MA61
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Sun, 14 November 2004 07:23
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| TRD_Celica wrote on Sun, 14 November 2004 18:16 |
well wat is the deal with sound comps. i was in my mates suzuki swift that pumped 163 db
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From a stereo, not an exhaust.
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Location:
Kita-Ku, Sapporo, Japan
Registered:
January 2003
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Re: 170-200dbi MA61
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Sun, 14 November 2004 07:27
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| BlackSupra wrote on Sun, 14 November 2004 18:23 |
| TRD_Celica wrote on Sun, 14 November 2004 18:16 |
well wat is the deal with sound comps. i was in my mates suzuki swift that pumped 163 db
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From a stereo, not an exhaust.
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PML 
loud exhaust makes you sound like a complete dickhead... basically.....
and louder is not faster... a turbo will quiten down the exhaust but still faster than a fartmobile with milo tin exhaust..
if you want loud, just take off your exhaust manifold ... don't get much louder than that..
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I Supported Toymods
Location:
melbourne.vic.au
Registered:
May 2002
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Re: 170-200dbi MA61
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Sun, 14 November 2004 07:38
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| BlackSupra wrote on Sun, 14 November 2004 18:13 |
| Norbie wrote on Sun, 14 November 2004 16:44 |
| TRD_Celica wrote on Sun, 14 November 2004 13:10 |
i want to try to acheive around 200dbi from the exhaust.
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You are hereby banned from owning a Supra. Go and stand in the corner.
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I second this. NO SOUP FOR YOU!
...
| rob_RA40 wrote on Sun, 14 November 2004 16:50 |
should ban him from the forums as well
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I second this too.
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I do understand you want a loud sound system but it, have a subby in the back of the car whilst it is raining will make the tail gate rust... Trust me, my SA63 shows the after affects  thus my MA61 has got nothing in the boot at the moment.
Don't destroy the MA61 as it's rare enough as it is, keep it and preserve it, not abuse it and rice it...
That is my opinion for the moment till I wake up.
Cheers.
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I supported Toymods
Location:
Perth
Registered:
May 2002
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Re: 170-200dbi MA61
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Sun, 14 November 2004 07:38
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And you get pretty flashing lights from under the bonnet
I third that, give us the keys. No Supra for you. 
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Location:
Brisbane
Registered:
October 2002
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Re: 170-200dbi MA61
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Sun, 14 November 2004 08:30
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if i have misunderstood the difference between db and dbi, then i am sorry.
163db from a car stezza is very comendable, kudos.
dont fuck up the supra, just get the correct size exhaust for the car.
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Location:
Campbelltown
Registered:
November 2003
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Re: 170-200dbi MA61
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Sun, 14 November 2004 08:33
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I don't see the point, would a quiet exhaust ona heavily modified car be more fun, ie smoking lame arses at lights. Mate you are either a really really big ricer or just plain stupid. You would last about ten minutes if you were lucky before attracting the attention of cops from miles around. Go buy an excel stick your lame arse exhaust on it and leave the poor old toyota alone
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I supported Toymods
Location:
Epping, Sydney
Registered:
May 2002
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Re: 170-200dbi MA61
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Sun, 14 November 2004 08:37
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that's another question.. why would you want an exhaust like that?
isn't that just asking for a canary?
personally, I try for a quiet exhaust so as not to draw attention! (at low rpm anyhow)
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Location:
Hobart
Registered:
August 2004
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Re: 170-200dbi MA61
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Sun, 14 November 2004 10:07
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cause i like to cause trouble in old hobart town. i c yer point about preserving the toyota
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I Supported Toymods
Location:
Lwr Templestowe, Melbourne
Registered:
August 2004
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Re: 170-200dbi MA61
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Sun, 14 November 2004 10:43
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Then get an exhaust that suits the application. Seriously, at idle you can just hear the rumbling of my car. Its nice and docile, and old people and cops leave me alone coz I just look like a normal guy that spent some honest money doing up his car. Full throttle however  , now that's another story. My uncle took my car for a spin. I heard my car from a block away with the turb's spooling up. Heh. Gave me goosebumps.
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Location:
Hobart
Registered:
August 2004
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Re: 170-200dbi MA61
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Sun, 14 November 2004 11:41
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nice nice... how big is the zorst ?
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I Supported Toymods
Location:
melbourne.vic.au
Registered:
May 2002
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Re: 170-200dbi MA61
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Sun, 14 November 2004 12:02
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| Yian wrote on Sun, 14 November 2004 21:43 |
Then get an exhaust that suits the application. Seriously, at idle you can just hear the rumbling of my car. Its nice and docile, and old people and cops leave me alone coz I just look like a normal guy that spent some honest money doing up his car. Full throttle however , now that's another story. My uncle took my car for a spin. I heard my car from a block away with the turb's spooling up. Heh. Gave me goosebumps.
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And Yian, you can hear it? I thought you could hear your thrust bearing giving out?
Cheers.
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Location:
Castle Hill, Sydney
Registered:
February 2004
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Re: 170-200dbi MA61
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Sun, 14 November 2004 12:04
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mine is 94 db at 4000 rpm, i would not want any louder.
it sounds pretty tame on idle but once u open it up it roars, i wouldnt want it any louder, i feel like a dick as it is whenver i boot it
*hey everyone look at me
i'de gladly accept better mufflers any day!
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I Supported Toymods
Location:
Lwr Templestowe, Melbourne
Registered:
August 2004
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Location:
Hobart
Registered:
August 2004
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Re: 170-200dbi MA61
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Sun, 14 November 2004 14:03
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LMAO Gayline!!! HAHHAHAH thats funny.. well i want my supra to puto ut a bit of noise but that is just me
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I supported Toymods
Location:
Australia
Registered:
November 2003
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Re: 170-200dbi MA61
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Sun, 14 November 2004 14:16
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| jessetamsett wrote on Sun, 14 November 2004 20:04 |
mine is 94 db at 4000 rpm, i would not want any louder.
it sounds pretty tame on idle but once u open it up it roars, i wouldnt want it any louder, i feel like a dick as it is whenver i boot it
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94 dB @ 4000rpm is pretty quiet dude.
I'd hate to think what mine is.
I know Frank copped 7000rpm at about a 3m distance
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Registered:
June 2003
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Re: 170-200dbi MA61
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Sun, 14 November 2004 21:25
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The legal limit in NSW is 90dB. When I got my car engineered it was 89.84 dB @ 3500rpm. As far as I'm concerned, that's too loud. It might be funny at first to havea loud exhaust, but after 2 hours on a freeway you'll get REALLY sick of it.
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I supported Toymods
Location:
I renounced punctuation
Registered:
May 2002
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Re: 170-200dbi MA61
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Sun, 14 November 2004 22:47
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Please ban.
Thread reported to moderators.
Is it school holidays or is he just having some free computer time at playlunch?
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I supported Toymods
Location:
Perth
Registered:
May 2002
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Re: 170-200dbi MA61
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Sun, 14 November 2004 23:38
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| CrUZsida wrote on Sun, 14 November 2004 22:16 |
I know Frank copped 7000rpm at about a 3m distance
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It's loud....
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Location:
Adelaide
Registered:
September 2003
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Re: 170-200dbi MA61
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Sun, 14 November 2004 23:52
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| justcallmefrank wrote on Sun, 14 November 2004 18:38 |
And you get pretty flashing lights from under the bonnet
I third that, give us the keys. No Supra for you.
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4th that !!!
If you wanna do that sort of shit, browse hot 4's, not here
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I supported Toymods
Location:
Australia
Registered:
November 2003
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Re: 170-200dbi MA61
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Mon, 15 November 2004 00:26
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| joorsh wrote on Mon, 15 November 2004 05:25 |
The legal limit in NSW is 90dB. When I got my car engineered it was 89.84 dB @ 3500rpm. As far as I'm concerned, that's too loud. It might be funny at first to havea loud exhaust, but after 2 hours on a freeway you'll get REALLY sick of it.
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Isn't the legal limit 90 dB @ something like 1500rpm @ 1m?
Well, depends on state to state really.
Ours just says mustn't be noticably different from stock
But there is a difference between loud, and droney.
My original exhaust was really loud at WOT and high rpm, but almost silent at cruising speeds.
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Toymods Vice President
Location:
Sydney
Registered:
May 2002
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Re: 170-200dbi MA61
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Mon, 15 November 2004 00:56
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| gianttomato wrote on Mon, 15 November 2004 09:47 |
Please ban.
Thread reported to moderators.
Is it school holidays or is he just having some free computer time at playlunch?
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Sorry GT. As much as I'd love to be allowed to ban people for displays of "huge inteligence" such as this I'm just not allowed.
My advice to those in the thread thinking "How dumb is this guy?", if he doesn't get any replies he'll most likely ask different questions that may be of higher quality. If you don't want to see his posts, I wish I had this option but I should look at everything, go into your profile Click the ignore list tab and type in the username then click Add. Crisis averted.
My advice to TRD_Celica, the forums are a lot like other things in life. "You get out what you put in." At the moment you are only getting shit back from the forums. I'm sure you can figure out why that is.
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Registered:
August 2002
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Re: 170-200dbi MA61
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Tue, 16 November 2004 09:21
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| CrUZsida wrote on Mon, 15 November 2004 11:26 |
Isn't the legal limit 90 dB @ something like 1500rpm @ 1m?
Well, depends on state to state really.
Ours just says mustn't be noticably different from stock
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Its <=90db @ 75% of max power (or 3500rpm) @ 45degrees downwards to the exhaust @ 1m distance.
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I supported Toymods
Location:
Australia
Registered:
November 2003
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Re: 170-200dbi MA61
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Tue, 16 November 2004 09:28
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| BlackSupra wrote on Tue, 16 November 2004 17:21 |
| CrUZsida wrote on Mon, 15 November 2004 11:26 |
Isn't the legal limit 90 dB @ something like 1500rpm @ 1m?
Well, depends on state to state really.
Ours just says mustn't be noticably different from stock
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Its <=90db @ 75% of max power (or 3500rpm) @ 45degrees downwards to the exhaust @ 1m distance.
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Damn thats some fucked up rules over there
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I Supported Toymods
Location:
south Melbourne/KL
Registered:
June 2004
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Re: 170-200dbi MA61
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Wed, 17 November 2004 03:11
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i heard from a mechanic that exhaust is the loudest at around idle <2000 rpm unless u have some sort of variable valve system.
having said that, i believe its beneficial that noise level is measured @ 3500 rpm
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Location:
Kita-Ku, Sapporo, Japan
Registered:
January 2003
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Re: 170-200dbi MA61
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Wed, 17 November 2004 03:40
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how do you figure that??
it should be measured the way the authorities deem fit (ie those that will issue the fines  )
from COPofLVM
in NSW:
for pre ADR vehicles;
noise limits are 100dbA for bikes, and 96dbA for other vehicles.
emissions are no more than 4.5% carbon monoxide at engine idle rpm.
for ADr'd vehicles..
a)NO noise or other emission control feature required by any applicable ADRs may be removed or made ineffective.
b) a vehicle with substitute engine of a different design must meet the intent* of the later ADR applicable to either the original vehicle of the substitute engine.
* (summarised) meeting the intent = if engine comes from vehicle that fits the same or better ADR is okay as long as ALL noise and emission control features are retained unaltered.
from Appendix A (3.1) (for STATIONARY NOISE TEST)
max noise levels for cars:
96dbA for before 1 Jan 1983
90dbA for after 1 Jan 1983
(or you can apply test procedures of ADR 28, 28A or 39 instead)
site must be level for 3m in all directions from exhaust. no obstructions within this space except: vehicle, driver, person measuring, one observer. surface must be concrete, asphalt, or other rigid paving material.
background noise must be more than 10dB quieter than the vehicle being tested.
microphone must be within 35-55 degrees "to the direction in which exhaust gases are projected", at a distance of 500-600mm from exhaust opening. the height of micrphone must be min of 200mm off ground, and within 100mm of exhaust outlet height.
if you have two exhaust pipe seperated by more than 1m, each pipe is considered seperately! hmmmmm
engine speed shall be at least 75% of of engine speed that corresponds to maximum power. where speed of max power cannot be ascertained, rpm shall be not less than 3000rpm. auxilary equipment (air con) shall be operating at time of test. test is done in neutral (ie no load).
four consecutive tests are done (according to the test procedure provided) and difference between highest and lowest is less than 2 db. the average shall be considered the noise level.
there is however an optional driveby test that can be applied as well.
so there ya go... i can't be bothered typing any more
this is how it is done in NSW for engineering purposes..
200dbA? i want what he's smoking
Cya, Stewart
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Location:
Canberra, ACT
Registered:
September 2002
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Re: 170-200dbi MA61
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Wed, 17 November 2004 09:05
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The exhaust in my ke26 broke completely just after the 2-1 merge, before the resonator, while I was out driving the other day. It was fecking LOUD with any more than a poofteenth of throttle opening, yet purred surprisingly quietly at idle. Scared the poo out of some group of kids on the way home.
There's no way I'd want it like that every day, even though it did actually sound quite nice with WOT It's extremely antisocial, for starters. I've had the local Neighbourhood Watch coordinator visit my front door for a quiet chat, after a friend had visited a few times in his BMW Alpina, and that thing has a stock (Alpina) exhaust!
Happy neighbours are good neighbours. Don't underestimate them!
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I supported Toymods
Location:
Australia
Registered:
November 2003
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Re: 170-200dbi MA61
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Wed, 17 November 2004 09:10
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| indigoid wrote on Wed, 17 November 2004 17:05 |
I've had the local Neighbourhood Watch coordinator visit my front door for a quiet chat
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That is so sad that ppl take the job THAT seriously
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Location:
Canberra, ACT
Registered:
September 2002
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Re: 170-200dbi MA61
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Wed, 17 November 2004 09:18
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Nah I thought it was fair enough. 6 or 7 different households had separately and independently had a whinge at him about it. If I was him I'd probably have done the same. The Alpina sounds like God shouting (it really shrieks and wails like any decent inline 6 should ), but it is a bit antisocial
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I supported Toymods
Location:
Australia
Registered:
November 2003
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Re: 170-200dbi MA61
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Wed, 17 November 2004 09:24
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But how many times did he come around?
And what time of the night?
Was it like ever day for a week at 10pm?
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Location:
cronulla
Registered:
September 2002
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Re: 170-200dbi MA61
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Wed, 17 November 2004 10:00
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I had an RX7 with an exhaust that scored 107 Db I felt physically very ill after driving it for more than 20 mins and the headache lasted for hours, I was defected and fined on the way to the exhaust shop to have it replaced,
My MA61 with twin T3's on the 1J had twin dumps to a 3.5 x pipe then 2 parrallel 3 inch h-flow cats and then out into 3.5 inch with a straight through 3.5 inch muffler, that was about as loud as was legal and it was too loud. loud sucks, id much rather hear a crazy induction noise or turbo spool coming from a car than exhast, any dick with a 5 inch tip can make noise.
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Registered:
August 2002
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Re: 170-200dbi MA61
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Wed, 17 November 2004 11:12
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| JAZE wrote on Wed, 17 November 2004 21:00 |
I had an RX7 with an exhaust that scored 107 Db I felt physically very ill after driving it for more than 20 mins and the headache lasted for hours, I was defected and fined on the way to the exhaust shop to have it replaced,
My MA61 with twin T3's on the 1J had twin dumps to a 3.5 x pipe then 2 parrallel 3 inch h-flow cats and then out into 3.5 inch with a straight through 3.5 inch muffler, that was about as loud as was legal and it was too loud. loud sucks, id much rather hear a crazy induction noise or turbo spool coming from a car than exhast, any dick with a 5 inch tip can make noise.
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No no, that would have be well illegal according to my ears.
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Toymods Social Secretary
Location:
Sydney
Registered:
July 2002
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Re: 170-200dbi MA61
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Wed, 17 November 2004 11:53
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i like the part where you asked to do something outside the bounds of physical possibilities.
Contact Sir Isaac Newton. He can help you.
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I supported Toymods
Location:
Epping, Sydney
Registered:
May 2002
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Re: 170-200dbi MA61
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Wed, 17 November 2004 12:03
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that is all (I liked that pic so much I had to share it, and while this poor sod is getting flamed, I thought it oddly appropriate )
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I supported Toymods
Location:
Perth
Registered:
May 2002
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Re: 170-200dbi MA61
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Wed, 17 November 2004 14:21
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| BlackSupra wrote on Wed, 17 November 2004 19:12 |
| JAZE wrote on Wed, 17 November 2004 21:00 |
I had an RX7 with an exhaust that scored 107 Db I felt physically very ill after driving it for more than 20 mins and the headache lasted for hours, I was defected and fined on the way to the exhaust shop to have it replaced,
My MA61 with twin T3's on the 1J had twin dumps to a 3.5 x pipe then 2 parrallel 3 inch h-flow cats and then out into 3.5 inch with a straight through 3.5 inch muffler, that was about as loud as was legal and it was too loud. loud sucks, id much rather hear a crazy induction noise or turbo spool coming from a car than exhast, any dick with a 5 inch tip can make noise.
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No no, that would have be well illegal according to my ears.
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And after seeing it tonight, I can imagine, it's f'ing HUGE!
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I Supported Toymods
Location:
south Melbourne/KL
Registered:
June 2004
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Re: 170-200dbi MA61
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Wed, 17 November 2004 14:44
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| JAZE wrote on Wed, 17 November 2004 21:00 |
I had an RX7 with an exhaust that scored 107 Db I felt physically very ill after driving it for more than 20 mins and the headache lasted for hours, I was defected and fined on the way to the exhaust shop to have it replaced,
My MA61 with twin T3's on the 1J had twin dumps to a 3.5 x pipe then 2 parrallel 3 inch h-flow cats and then out into 3.5 inch with a straight through 3.5 inch muffler, that was about as loud as was legal and it was too loud. loud sucks, id much rather hear a crazy induction noise or turbo spool coming from a car than exhast, any dick with a 5 inch tip can make noise.
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i have a 5" tip but its not that loud. practically nothing at idle and lots of 4age ENGINE noise 5000rpm onwards!!
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