how about sourcing a quiet exhaust that still does the job and it passes emissions/pigs/epa :P
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how about sourcing a quiet exhaust that still does the job and it passes emissions/pigs/epa :P
nah...manQuote:
Originally Posted by XXpl0Sive
i got my exhasut enginneered he said the limit is 96db
that's weird, the engineer told you this?
yeap
he looked at the paper and it said
95.4
and he goes yeap all done mate..
my civic is far over 90DBs
probably around 96 ~ 98DBs ... a little higher when they back off in the EPA test
as far as i know no points are involved. Just a fine and the cost of fixing the defect ....
in fact i know for a fact, because a guy i know has 78 Defect notices for the one car ... its still on the road and he still has his licence
78 deftects??? why would u do nething to a car thats going to cost u 78 defects? every defect comes with a fine? correct me cos i dont know? I suppose if u have the money to pay for it ,who cares.Quote:
Originally Posted by Mitch M
to go up 1db is to double the volume..hope you know that
What about cars that dont achive 6000RPM????Quote:
96PB at 6000RPM is the limit
The limit in victoria is 2 thirds max RPM(talking Redline) so on my car, 4300RPM and its 90dB. 90dB in ambiant air is LOUD. and considering its not even Max RPM theres more noise to come!
1db = double the volume???
The human ear can only physically hear the difference of around 3db increments...therefore, the human ear can't tell the difference between 90 and 91db...that's all I know anyway....
You won't always cop a fine with a defect. I have been defected probaly 5 or 6 times with various cars and have only received a fine on one occasion...on that particular occasion I didn't get the defect notice (just the fine). When I asked the cop about it, he said it was at their discretion as to whether the issue fines, defects, or both. He just said he wouldn't bother issuing a defect notice because it would get checked at rego time...little did he know that the car was only 18 months old so I didn't have to get it checked until after the third year....
In NSW as far as I am aware the limit is 90db, tested at 2/3s max revs. There is also a certain angle and distance from the tip that the device has to be (but I can't remember what they are) - sounds similar to Victoria.
The key to the testing is open air. They often test in places surrounded by factories where you are going to get a lot of resonance from the exhaust bouncing all over the place. Basically it has to be tested in a paddock or something for a true reading, but then I guess it just depends on how you interpret it...
Who the hell told you that???Quote:
The human ear can only physically hear the difference of around 3db increments...therefore, the human ear can't tell the difference between 90 and 91db...that's all I know anyway....
Something I learnt from back in my car audio installing days doing testing and the like...
All I'm saying is that the human ear is unable to distinguish the difference between 90 and 91db, hence I do not believe 91db to be twice the volume of 90db, that is, unless I am simply misinterpreting what xxplosive is saying by 'volume'.
That's all.
sound intensity basicly doubles every db.