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How loud is your aftermarket exhaust? A call for decibels

Originally Posted by XwChriswX Fast Intentions Long Tube Headers Fast Intentions 2.5" CBE w/ 18" Resonators and SS Cans 94dB @ 50 ft. at WOT, measured at Arizona Motorsports Park

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Old 11-25-2013, 10:54 PM   #1 (permalink)
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Originally Posted by XwChriswX View Post
Fast Intentions Long Tube Headers
Fast Intentions 2.5" CBE w/ 18" Resonators and SS Cans

94dB @ 50 ft. at WOT, measured at Arizona Motorsports Park

What's not passing?
50ft behind? The side as you blow by?
Whats WOT? Like WOT at 2k? 3k? Redline? In what gear?
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Old 11-26-2013, 02:26 AM   #2 (permalink)
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Originally Posted by synolimit View Post
What's not passing?
50ft behind? The side as you blow by?
Whats WOT? Like WOT at 2k? 3k? Redline? In what gear?
Some tracks have a limit of 95db. If you are over, you're done. The ones I have seen are usually positioned at the starting line or close to it so they can measure at WOT as you pass by close to redline. Doesn't matter what gear you're in.

You should know this stuff from doing motorcycles. Same set-up. Or don't you? If you raced motorcycles like you said. You've been through it.
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Old 11-26-2013, 07:06 PM   #3 (permalink)
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What's not passing?
50ft behind? The side as you blow by?
Whats WOT? Like WOT at 2k? 3k? Redline? In what gear?
Anything above 94dB fails.

Mic placed 50ft to the side of the track perpendicular to the straight.

Close to redline in 4th gear.
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Old 11-26-2013, 10:51 PM   #4 (permalink)
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Anything above 94dB fails.

Mic placed 50ft to the side of the track perpendicular to the straight.

Close to redline in 4th gear.
I'll have to try it on a country road.
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Old 02-05-2020, 02:04 AM   #5 (permalink)
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Sad to see this thread has died, I think it could have been a good sticky. A buddy of mine was messing around with his reader (I don't know if it was dBA or C) and we got up to 103dB in my cabin with the windows up.

I removed the cats and put on Beluga resonated test pipes, and I've also had a muffler delete... I'm planning to go to an exhaust shop soon to get the car quiet downed a bit as people in the area aren't too happy about my car at 2am. I'll see if they have a reader by any chance and update...
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