Da Groj

Carracer wrote:Any chance of releasing the sound level information you have collected? I'm sure I'm not the only one that is a little curious how loud (or not) their car is.

Yours is one of the quietest.

So today I put the stock mufflers back on the #44 Mustang. From 10 yards DIRECTLY behind my car I am now 94.4 at wide open throttle. With that being said, I should be in the very low 90's/ high 80's in the trailer at the start line. So disappointed to let the Roush exhaust go... But it is what it is.

I should be good to go...See y'all on Saturday.

Carracer wrote:Any chance of releasing the sound level information you have collected? I'm sure I'm not the only one that is a little curious how loud (or not) their car is.

I bought a db meter to test my exhaust after switching back to stock. I will bring it Saturday if you would like to run your own tests.

vzwire wrote:So today I put the stock mufflers back on the #44 Mustang. From 10 yards DIRECTLY behind my car I am now 94.4 at wide open throttle. With that being said, I should be in the very low 90's/ high 80's in the trailer at the start line. So disappointed to let the Roush exhaust go... But it is what it is.

I should be good to go...See y'all on Saturday.

Yep, you'll probaby be all right. We'll let you know!

10 yards is only 30 feet. You should be good.

Quick update for those who are interested. There were enough loud cars at the Feb 13 event that we went ahead and scanned all of them. Of 105 drivers at this event, only 10 cars were "loud", a few of those were right at the 95 limit, and only 3 were 98+.

The start on this course had a kink in it that had almost every car (other than the really slow ones) easing off of the throttle before getting over about 5,000 rpm off of the start. That means that many of the sound readings were LOWER than the peak that we'll see with a straighter start.

We've decided to note the "violators" in the event results so that we'll have a permanent record to refer to. If you want to know who was loud, just look for a db reading in parenthesis after their last name in the results.

Thanks to those we were loud and have already taken steps or are preparing to take steps to get their exhaust quieter! We really appreciate it.

3T M1 47 Sean Schenck (95.0 dba) 2000 Honda S2000

Cool. Yet another goal. Equal Sean in a sonic drag race

Loren wrote:If you want to know who was loud, just look for a db reading in parenthesis after their last name in the results.

Sort of surprising...there are some cars in there that never struck me as loud. Must have lost some nerve endings earlier in life....

Jamie wrote:

Loren wrote:If you want to know who was loud, just look for a db reading in parenthesis after their last name in the results.

Sort of surprising...there are some cars in there that never struck me as loud. Must have lost some nerve endings earlier in life....

I bought electronic ear muffs for the next time I am the starter, I don't have enough nerve endings to lose any more.

jev61 wrote:

Jamie wrote:

Loren wrote:If you want to know who was loud, just look for a db reading in parenthesis after their last name in the results.

Sort of surprising...there are some cars in there that never struck me as loud. Must have lost some nerve endings earlier in life....

I bought electronic ear muffs for the next time I am the starter, I don't have enough nerve endings to lose any more.

At my previous job we were required to take a hearing test every year. One year I decided to ignore the beep until it was loud, later when I received the results it said my hearing was normal for my age. My ears have been ringing since I was a teenager and fired a 357 magnum snub nose without any protection.

I'm right there with you. Chronic tinnitus for somewhere near 30 years. From loud concerts, not wearing proper hearing protection around loud industrial equipment, and a backfire incident in a garage that blew up a muffler.

Tinnitus sucks.

Here's the loudest of the loud from the April 9th event at Brooksville. Only 3 of 89 entries broke our "hard" limit of 98 db:

Early Group 1:
Steven Brand Red Trans Am - 103.8
Chris Metzger Silver RX7 V8 - 101.6
Chris O'Hare Red Porsche 993 - 95.8
Bess or someone Infiniti G35 - 95.0
Sean Shenck Honda S2000 - 96.2

Early Group 2:
Floyd Schrammeck Datsun 510 - noted, but my handwriting stinks.

Late Group 1:
Les Davis Vee - 95.8, 96.1
David Lineberry - BRZ - 95.3 consistently

Late Group 2:
Kurtis Clauser - 95.3-96.0
Dave Day Mustang - 98.8-101.3 - new downward facing exhaust tips didn't work

We didn't stop anyone from running, but "repeat offenders" do run that risk. We did give several of you a heads-up, and emails will be sent out with polite requests to continue your efforts to quiet down your exhausts.

Oddly, some of you got louder compared to prior events, which may mean the start this time was a little more aggressive, or perhaps some experimentation / trial and error is going on. We do appreciate your trouble trying to quiet things down.

Link to policy:
http://drivefast.org/rules/exhaust-sound-level/

Good news, y'all!
We're raising the db limit, effective immediately. "Soft" limit will be 96, and "hard" limit will be 99.

And bad news, for some, as here's the list of car numbers and db levels from the May 6 Open at Brooksville:
EARLY
7/107 - 98.7
711 - 97.9
178 - 98.9
310 - 106

LATE
96 - 102.5
86 - 105.3
421 - 98.5
231 - 100.6
112 - 96
21 - 97
57/157 - 98.8

Now, we do realize that "loud" is dependent on many variables, and courses, which is why we try to be as permissive as we can in enforcing our rule. Still, if you see your number listed, well, we're asking you to do something to reduce your car's sound level before you come to your next event. We'll be checking, and while we don't want to poop on the party, we do reserve the right to shut you down if your car is just too darned loud.

Thanks for your support and understanding.

What part of the course do you check the db levels?

CaptainSquirts wrote:What part of the course do you check the db levels?

We measure from the start:
http://drivefast.org/rules/exhaust-sound-level/

Ah makes sense. I never use the rev control when launching until today, which bounces me off 5.5k. I guess doing that causes my levels to go higher than previous events.

Launching is bad, mmkay...

Mufflers are good.

Native wrote:Launching is bad, mmkay...

It's only bad if someone else does it