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Ben Lipman
Goo Roo
SA
Soarer TT manual, plus TT track car

Posts: 3279
Reg: 04-2006

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Monday, August 20, 2012 - 07:35 pm, by:  Ben Lipman (Ben12a)

G'day Daniel.

Mallala don't seem fussed with noise levels. Darwin had a rule, but never enforced it. Sydney tracks were more strict, being a 92 or 96Db limit. Qld is the same I believe. One of the track I visited (Wakefield or Darwin) had some policy about needing a muffler to prevent grass fires...

Most events I have entered state either 92 or 96Db measured at 30m, so I would aim to meet that standard.

I currently have custom dumps, 3 inch front pipe, 3 inch mid pipe into twin 2.5 inch pipes and Trust straight through mufflers. No cat. About as high flow as you'll get on a twin system.

I want to go 3 inch all the way through a single muffler. Mostly to save weight and increase noise. The car would easily pass emissions (noise) testing as a streeter, LOL. (this system plus a cat used to be on the road car).

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