Thread: Exhaust dB data
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Old 12-07-2004, 09:54 PM   #13
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Originally Posted by Jon [in CT]
I think you should take measurements at the distances and angles specified by CA regs (which, so far, have not been presented here).
Throw a brother a bone here Jon! You are the .pdf/regulation Guru, hook a brother up if you know/can find the real info!

From my limited research, I would need a sound level meter complying with ANS S1.4-1971 (mine isn't and the real things run ~$300) and would have to comply with SAEJ1169 Testing Procedures:

And the Engine RPM must be held steady at 75% of rated peak horsepower RPM. Given the latter figure is 6,000 RPM for the US spec WRX/STI, the test speed is 4,500 RPM for these vehicles.

This is all too much of a pain for me to think of doing, so sorry California Scooby owners.
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Last edited by Unabomber; 12-07-2004 at 10:55 PM.
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