In our region, Los Angeles and San Diego (and i beleive it's an SCCA standard) is 95db from a certain distance at a certain angle, at a certain rpm in a certain gear...if i am to understand it correctly
1990 Protege 2.5L V6 - #98 SM Solo2 SCCA 2004 Mazda6 Wagon 2004 Mazda3 Sedan
Post by speedracer906 on Mar 22, 2003 8:37:25 GMT -5
Here is a link to the Pro Rally sound check site. www.scca.org/news/tech/prorally/PRTB103102a-sndchkdiag.pdf It's possible that we have alittle more tolorence to max allowability becouse it say's no more than 105db. The RPM was only 2500, just make sure to run the throttle smooth as to not cackel the exhaust. A glasspack sounds nice and helps keep it from sounding too loud.