.....Legal DB limit for Exhausts
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Re: Legal DB limit for Exhausts
on roads there is no limit, on track its usually 98 or 100db
mines 104db bung out
97 with bung in
mines 104db bung out
97 with bung in
'02 VX220 2.2 n/a Daily driver - Exige Size TD 1.2 - TAT shorty Diffuser - HardTop - Chris Tullet 4-1 Manifold.'97 mk1 Mazda Eunos Turbo track car with 260bhp/ton - soon more as Chris Wilsons going to build me an engine over the winter 
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karammander
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Re: Legal DB limit for Exhausts
what revs and how close to the exhaust should you measure the volume?
thanks karam
thanks karam
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Lauren
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Re: Legal DB limit for Exhausts
karammander wrote:what revs and how close to the exhaust should you measure the volume?
thanks karam
As a rule
(though this may only work for Combe & Goodwood these days), you should hold 4500rpm and measure 0.5m diagonally away from the exhaust tip. Combe is 100db, Goodwood 98 driveby.Donny for example operates a 98db driveby limit.
This is simply impossible to test for though. I don't think any MR2s on the last Donny track day failed the noise test.Different circuits operate different noise limits.
though i'd say to be safe ie so you can go on any circuit getting the noise under 95db static is the way to go. My old SC ran at 88db @4500rpm, so i could take it anywhere with no worries of failing noise tests.