500+ bhp trackdayers, how are you passing noise regs ?
17 October 2009, 07:55 PM
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500+ bhp trackdayers, how are you passing noise regs ?
As above really, i'm assuming you guys are de-catted and running ext wastegates but how are you passing the noise regs ??
18 October 2009, 10:04 AM
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I run a large silenced midpipe and a super silent kakimoto rear box on my RX7, its around 92db on light throttle idle but theres no way of measuring the sound level once on full throttle as I have a external wastegate and side exit screamer pipe, Im pretty sure Hayward and Schott could put something together for you and possibly modify the EWG to vent back in to the exhaust system ???
Last edited by Jam Performance; 18 October 2009 at 01:20 PM.
18 October 2009, 10:07 AM
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I am running no cats at all and an external wastegate but it is fine with the noise regs.
Paul who works in the Enginetuner workshop made my 3 inch exhaust for me. As far as I am aware the only silencer is at the back.....
Paul who works in the Enginetuner workshop made my 3 inch exhaust for me. As far as I am aware the only silencer is at the back.....
Last edited by screechy; 18 October 2009 at 10:08 AM.
18 October 2009, 10:24 AM
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I suppose plumbing the wastegate back into the exhaust system would be a start,but to be honest i think the exhaust system would still be too loud.
Its a Hayward and scott system straight through with just the rear silencer, i'd change it for something different if i knew it would'nt be restrictive
Its a Hayward and scott system straight through with just the rear silencer, i'd change it for something different if i knew it would'nt be restrictive
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