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Road America dB limit 103

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Old 08-26-2010, 12:17 PM
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John H
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Default Road America dB limit 103

Wondering if I am going to have a problem running headers and a short pipe on my stock 993 3.6. Anyone feel confident in guessing? How do they measure it? I downloaded an app for my IPhone. Is it a 50 feet, 100 feet, 6 inches? I assume it's a drive-by type situation as well. I have turn downs, will that help? Should they be pointed in any specific direction? TIA
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Old 08-26-2010, 12:20 PM
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What group / region is forcing that rule?

The three vintage events alone surpass that level with every run group.
Old 08-26-2010, 12:32 PM
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John H
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from the PCA Club Racing email:

Thank you for registering for the Chicago Region's TRAC 2010.

Your registration is CONFIRMED.

Please note that your PCA Membership, PCA Club Racing License, and PCA Club Racing Medical MUST be up to date in order to complete registration at the track. This confirmation does NOT guarantee that your paperwork is up-to-date. Any questions regarding PCA Membership, PCA Club Racing License, or PCA Club Racing Medical should be directed to me at clubrace@pca.org

All Rookie Candidates and First Time Provisionals for whom this will be their first PCA Club Race and other invited guests must attend the Orientation Meeting in the Road America Registration Building at 6:30 PM on Friday evening, September 3rd.

The Rules of Road America are attached. Please review and share them with your crew, family and friends who will join you at Road America

The maximum Road America noise restriction level is 103 and will be enforced by the track during the event weekend

* * * * * *

We look forward to seeing you at TRAC 2010

Susan Shire
TRAC 2010 Club Race Registrar
Old 08-26-2010, 12:39 PM
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Spartan
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I've been there before and had zero issues with my setup. 993tt with straight pipes off the turbo's. Its gotta be louder than 103 but no one enforced it.
Old 08-26-2010, 12:46 PM
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John H
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A couple years ago a certain cup car screamed by me and almost made my ears bleed. I thought maybe this was something new for this year. Honestly, I don't even think I'll be over 103 anyway. Just wonderin'
Old 08-26-2010, 12:48 PM
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paradisenb
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Originally Posted by John H
Wondering if I am going to have a problem running headers and a short pipe on my stock 993 3.6. Anyone feel confident in guessing? How do they measure it? I downloaded an app for my IPhone. Is it a 50 feet, 100 feet, 6 inches? I assume it's a drive-by type situation as well. I have turn downs, will that help? Should they be pointed in any specific direction? TIA
Away from the meter. Only being half facetious.

Many race cars at Roebling use the method of installing a 90 degree angle adapter to the pipes and turn it away from the meter. Mornings more likely to be a problem than afternoons.
Old 08-26-2010, 12:59 PM
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Originally Posted by Spartan
I've been there before and had zero issues with my setup. 993tt with straight pipes off the turbo's. Its gotta be louder than 103 but no one enforced it.
They must have the DB meter mounted on the roof of the VIP tower

Or maybe it's on the patio at Siebkens.
Old 08-26-2010, 01:01 PM
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Jarez Mifkin
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Most clubs measure from 50 feet away. My 3.8 hits 106 at Barber unmuffled. With ssssupercraps its atleast below 104 because I've never been hit with a sound infraction.


Just find where they are measuring sound and point the turn downs away from the meter or shift gears at the meter. You could also get creative with brillo pads and chicken wire....
Old 08-26-2010, 01:09 PM
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Thanks guys. Hopefully the sound checker will be in an obvious location. I am never at more than 1/4 throttle anyway.
Old 08-26-2010, 01:25 PM
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Originally Posted by John H
Thanks guys. Hopefully the sound checker will be in an obvious location. I am never at more than 1/4 throttle anyway.
We know that's right!
Old 08-26-2010, 01:27 PM
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Originally Posted by John H
Thanks guys. Hopefully the sound checker will be in an obvious location. I am never at more than 1/4 throttle anyway.
Drive "flat out" like everyone else???
Old 08-26-2010, 02:50 PM
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Chipster
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John,

You shouldn't have a problem.

Your car has to be actually running for this test.
Old 08-26-2010, 02:58 PM
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Oh, it's running...and the graphics are straight this time
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Old 08-26-2010, 04:03 PM
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Traditionally sound station for SCCA is drivers left after T3 at Road America. Not sure what PCA will do.
Old 08-26-2010, 05:11 PM
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PCA uses the SCCA sound tester.

I had no problem last year with straight pipes off my '73 2.7 although no guarantees that they won't be enforcing this year. I was told by friends who were standing next to Siebkens that they could hear me back off as I turned back into Road America last year, after the Saturday night drive back from the Siebkens street concours.....

When I've stewarded there we only had one problem, when the sound tester inexplicably moved closer to the track, and after asking her politely to move back, the problems went away.

No guarantees but I doubt you'll have a problem.


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