Gonzogonzilla

My .1 GT3 is unfortunately too loud for AMS track in AZ and I'm told, too loud for Laguna Seca - a track I'd like to drive before I die. Any quick fixes to get my factory exhaust down to 95db or below so I can run this car?

lowbee

What do you use to measure 98dB ? or are you quoting the spec Porsche provide ?

user 72902

Wow they are busting your chops over 3db? With a stock exhaust? Maybe the exhaust vendors have some kind of temporary solution to get you past their inspection like different tips. GL

Hella-Buggin'

I drive Laguna fairly often and can tell you that the key is to short shift and take it easy coming up the hill between T5 & T6 as that's where the sound meter is. I've also seen loads of cars with Laguna Pipes.

Devil Boy

Arizona Motorsports Park (AMP) has a sound limit of 94dB. Before you're allowed to drive on the track you have to pass sound check.

Louis de Funes

a race track with sound restrictions ?

that is strange

I read a little about it and know understand the reason about Laguna Seca

gasongasoff

95dB at what distance?

ColoradoMark

Every 3db is twice as loud.

gasongasoff

3dB is twice the power, but a small, but audible difference in perceived volume
10dB is a doubling of perceived volume.

Gonzogonzilla

A sound check I got black flagged for. The draconian penalty for busting the limit was so penal that I pulled out of the event rather than short shift the car and have zero fun. Laguna pipes, eh?

Devil Boy

Blame the ******** who live in neighboring Litchfield Park. I believe it's a city ordinance or something to that effect that track has to abide by or they receive a fine. The asinine thing is Luke AFB (an active fighter jet base) is adjacent to the track. If you have a stock exhaust, typically you'll pass and I've seen GT3s run out there plenty of times. They'll give you a sticker to put on your door jam when you pass sound check.

Hella-Buggin'

Audio Engineer here...

+/- 1db represents the smallest incremental change detectable by the average human ear.

bkovac

cheapest fix is to lift and short shift at turn five. We race recently and my car passed on saturday. Sunday had no cloud cover but the direction of the breeze had my car fail on Sunday. Had to remove supertraps.