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      02-24-2013, 02:38 AM   #1
Alekshop
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If the Exhaust is too loud - Here is your solution

As some tracks have sound restrictions we had to make our Akrapovic GT4 system quitter to pass the sound ...

Here is your solution





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      02-24-2013, 06:15 AM   #2
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      02-24-2013, 09:05 AM   #3
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Supertrapps are real bad for power but depending on the disc setup can do a good job of quieting things down.We used them over 20 years ago on our racecar & went to Flowmasters to meet the noise regs.I am suprised that Supertrapps are still used.
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      02-24-2013, 10:50 AM   #4
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...In this order and that person shouldn't be allowed to mod cars again.
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      02-24-2013, 11:37 AM   #5
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That looks horrible
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      02-24-2013, 11:42 AM   #6
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looks pretty bad. if it was a quick disconnect just used at the track that would work. are the angled sideways to direct sound away from the db booth?
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      02-24-2013, 12:18 PM   #7
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They go on in minutes at the track. You guys who don't like them obviously never been to Laguna Seca. there are a ton of 90db limit days this year. My akra evo won't pass sound. And many stock cars don't pass either.
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      02-24-2013, 12:30 PM   #8
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I am not feeling it either, but at least it is only on for the track.
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      02-24-2013, 12:31 PM   #9
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      02-24-2013, 01:26 PM   #10
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I find it ridiculous to have noise restrictions at a race track...WTF, its a RACETRACK!!!
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      02-24-2013, 01:32 PM   #11
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      02-24-2013, 01:36 PM   #12
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is that beer can exhaust?
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      02-24-2013, 03:17 PM   #13
tbone28
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this is one part of the car scene in japan. It was the 1st thing that came to mind when I saw the original post









Quote:
Originally Posted by 1MOREMOD View Post
is that beer can exhaust?
Miller for car shows, Miller Lite for the track

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      02-24-2013, 03:23 PM   #14
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      02-24-2013, 04:39 PM   #15
///M Power-Belgium
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These can count also
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      02-25-2013, 12:41 AM   #16
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Quote:
Originally Posted by klammer View Post
I find it ridiculous to have noise restrictions at a race track...WTF, its a RACETRACK!!!
Agree 100%. Oktoberfest at Laguna this year would be great, but with 92 db what's the point? Rant over...
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      02-25-2013, 01:11 AM   #17
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Quote:
Originally Posted by klammer View Post
I find it ridiculous to have noise restrictions at a race track...WTF, its a RACETRACK!!!

This +1000000000
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      02-25-2013, 10:45 AM   #18
THE TECH
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It's interesting that they even need noise restrictions since Laguna Seca is nowhere near any housing tracts.
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      02-25-2013, 11:11 AM   #19
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Quote:
Originally Posted by THE TECH View Post
It's interesting that they even need noise restrictions since Laguna Seca is nowhere near any housing tracts.
Maybe they think the noise will bother the grapevines?
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      02-25-2013, 11:46 AM   #20
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^ this

All of the essence would be removed by sonic waves. <rolleyes>
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      02-25-2013, 12:00 PM   #21
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Quote:
Originally Posted by klammer View Post
I find it ridiculous to have noise restrictions at a race track...WTF, its a RACETRACK!!!
This is just the tip of the iceberg.I can think of a few tracks in our local area that have noise restrictions.Noise was a huge problem for our newest track to get goverment approval thanks to the local NIMBY's. that live around it.A loud street exhaust will pass with no issues.

Quote:
SOUND MANAGEMENT & RESTRICTIONS


All Participants must adhere to the mandatory noise restriction of 92 dB or lesser without exception. Calabogie Motorsports Park will measure noise levels of ALL vehicles and/or equipment prior to being granted access to the track.

In today’s Motorsport activities, sound management a joint task shared by all members including tracks, clubs, participants, promoters and even fans. As an established motorsports facility, Calabogie Motorsports Park (CMP) has imposed its own noise guidelines, testing procedures and maximums to ensure CMP creates a favourable environment for all.
1.Screening Test – After a brief visual muffler check, a stationary test is undertaken. Sound levels will be measured 15 feet in front and behind the vehicle while the engine is revved at the maximum allowable rpm or the red line of the tachometer. ◦Cars, the average should be no more than 100 dbA with no single reading over 104 dbA.
◦Motorcycles, the average should be no more than 98 dbA with no single reading over 100 dbA.

2.Pass-by Test – With the vehicle under full acceleration on the track, a reading will be taken from 50 feet. The maximum level allowed is 92 dbA. This level and standard is the most commonly used in North America and Europe and is where the entire industry is headed. Tests are valid for 9 months unless modifications to vehicle are made.

Cars and motorcycles that do not meet the noise criteria in the pass-by test will be black flagged and will not be allowed to run until modifications have been made and a re-test performed to ensure compliance with the guidelines. It is the driver’s responsibility to ensure their vehicle meets the noise restrictions that Calabogie Motorsports Park has in place.
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      02-25-2013, 12:53 PM   #22
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Quote:
Originally Posted by 1MOREMOD View Post
is that beer can exhaust?
Hmm, when I was little Dad used to have a 55 Chevy wagon which used metal cans from frozen orange juice concentrate as an actuall part of the exhaust. They were the right diameter, and held up pretty well.
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