Changed the exhaust a couple months back, update...

Car: 2006 S2000 AP2

Header: PLM (about 11 lbs)
Cat: Berk 63mm HFC
Cat Back: T1R Sparrow, 63mm, dual exhaust
SCCA Sound Rating: ?? dB measured at 2010 Nationals on West course


This catback is definitely not as high-pitched as the First Racing F1 catback. There is less drone as well.

 

Did you use any shielding gas?? If so what mix?

Thanks,

Rob

 

Just a note that at the DC Prosolo they were taking sound from many different locations and we had 3 drivers so I got lots of data on sound from the Greddy RS single 70mm exhaust. Car is an AP2 with PLM header, Berk 70mm cat, Greddy RS exhaust, K&N FIPK, and lightly tuned with hondata. Not using the silencer. Dunlop tires (that probably factors in, I think they're louder than hankooks).

Most of the readings were 90-93 dB but there were a couple 94-95.0 dB readings.

 

DJon,
Where did you see the db readings listed? I'm very curious on the readings of my car.

Thanks

 

At national events they have a binder in the red tent where all the results were posted. You could try emailing one of the DC people and seeing if they'll tell you a couple of your numbers or see if they have it digitally somehow. For nationals they actually post them online typically but I don't think they do for the smaller events.

 

At national events they have a binder in the red tent where all the results were posted. You could try emailing one of the DC people and seeing if they'll tell you a couple of your numbers or see if they have it digitally somehow. For nationals they actually post them online typically but I don't think they do for the smaller events.
[/quote]

I see. I did see the one person taking readings on the left course, but thought they'd be posted online somewhere.
Would they have warned us if my car was too loud at FedEx Field? I'm curious if the 76mm exhaust will be a problem at Lincoln.

Thanks

 

At national events they have a binder in the red tent where all the results were posted. You could try emailing one of the DC people and seeing if they'll tell you a couple of your numbers or see if they have it digitally somehow. For nationals they actually post them online typically but I don't think they do for the smaller events.
[/quote]

I see. I did see the one person taking readings on the left course, but thought they'd be posted online somewhere.
Would they have warned us if my car was too loud at FedEx Field? I'm curious if the 76mm exhaust will be a problem at Lincoln.

Thanks
[/quote]

Yes, the sound guy in DC....we'll say he takes his job very seriously. A bunch of XP people got warnings I know.

So you definitely had no runs over 97dB or you would know. Lincoln has the same limits, 97 warning, 100 means fix it.

 

At national events they have a binder in the red tent where all the results were posted. You could try emailing one of the DC people and seeing if they'll tell you a couple of your numbers or see if they have it digitally somehow. For nationals they actually post them online typically but I don't think they do for the smaller events.
[/quote]
I see. I did see the one person taking readings on the left course, but thought they'd be posted online somewhere.
Would they have warned us if my car was too loud at FedEx Field? I'm curious if the 76mm exhaust will be a problem at Lincoln.

Thanks
[/quote]

Yes, the sound guy in DC....we'll say he takes his job very seriously. A bunch of XP people got warnings I know.

So you definitely had no runs over 97dB or you would know. Lincoln has the same limits, 97 warning, 100 means fix it.
[/quote]

Glad to know. I just emailed Perry to find out if there will be readings at NNJR divisional.

Thanks for the info Jon.

 

I did sound for the first heat. Only the L2 (SSM) RX7 and L2 (DSP) BMW blew over 97 (not over 100). I thought AJ's STC civic would be close but it was 95-96 all weekend. If that car didn't blow sound, none of the STR cars did most likely. That said, I was 96-97 all weekend...with a high of 97.8 on Sun morning.

If you had gone over 97, you would have been yelled at by the Chief of Sound during impound on top of the warning as well.

 

Very interesting. Thanks for the information, greatly appreciated.