05-23-2019, 02:33 PM | #29 |
Senior Member
Join Date: Oct 2013
Drives: 2013 BRZ, 2023 Model 3
Location: SF Bay Area
Posts: 2,298
Thanks: 1,219
Thanked 863 Times in 570 Posts
Mentioned: 15 Post(s)
Tagged: 0 Thread(s)
|
How far away from the exhaust are people doing these DB readings?
My buddy’s 2015 stock Z/28 blew sound at Laguna Seca @ 93db, but that’s also like 40 feet away from the sound booth. |
The Following User Says Thank You to norcalpb For This Useful Post: | Irace86.2.0 (05-23-2019) |
05-23-2019, 05:29 PM | #30 | ||
Senior Member
Join Date: Mar 2017
Drives: Q5 + BRZ + M796
Location: Santa Rosa, CA
Posts: 7,884
Thanks: 5,668
Thanked 5,806 Times in 3,300 Posts
Mentioned: 70 Post(s)
Tagged: 0 Thread(s)
|
The inverse square law states that the decibels will drop by 6 for every doubling of the distance
Quote:
This would suggest that an exhaust has to be pretty loud at distance to catch the attention of a cop, and that the distance measured from the tailpipe would matter too. The measurement goes like this: Quote:
__________________
My Build | K24 Turbo Swap | *K24T BRZ SOLD*
|
||
The Following 3 Users Say Thank You to Irace86.2.0 For This Useful Post: |
05-24-2019, 12:34 PM | #31 |
Lowly Cartuber
Join Date: Jul 2016
Drives: 2016 BRZ, 2005 Honda S2000
Location: California
Posts: 904
Thanks: 41
Thanked 422 Times in 281 Posts
Mentioned: 13 Post(s)
Tagged: 0 Thread(s)
|
Theres a bunch of youtube videos of people doing a db test and showing the Abarth showing a range of between 98-110 db depending on the video and equipment used.
Donut Media also did a video on the exhaust law and test one of their employees stock Fiat Abarth and they got around the number i mentioned. So yes while these arent official numbers, Donut Media did follow the exact procedure when doing the test (compared to someone standing behind with an iphone) and so i'm inclined to think they were pretty accurate on their findings. Thats the video with a timestamp where they test the stock Abarth. Actual number they got was 100db and some change so i was off by two, but fact of the matter is thats still illegal. The thing is, there isnt a universal sound compliance level. Not really. While most cars stay around the 90db range, a lot of manufactures dont make their cars to apply to this standard because it changes per state and per country. As i stated above, Oregon has a DB limit of 88. And since CA has a noise limit of 95db...who do car manufactures listen to? Thats usually why a lot of these laws come with modifiers. For example, one of the modifiers say that your car MUST have a working muffler. Which again the stock Abarth actually fails because it literally comes from the factory with a muffler delete. And now you begin to see the issue. Because a fully stock Fiat Abarth which can legally be sold in California by Fiat dealers, is immediately not compliant with noise AND exhaust laws in California on the showroom floor.
__________________
2016 Limited MT WR Blue BRZ | Delicious Flash n Go Tune | Delicious Flex Fuel Kit | Nameless 2.5" with 5" Mufflers | JDL UEL Headers | Bayson R Diffuser/Side Skirts | APR Front Splitter | VIS Racing GT Wing | ST Suspension Coilovers | Grammlights Rays 57CR 17x9 +38 | Sumitomo HTR Z iii 235/45/17 |
|
The Following 2 Users Say Thank You to Xxyion For This Useful Post: | Irace86.2.0 (05-26-2019), mgarcia707 (05-24-2019) |
05-24-2019, 01:05 PM | #32 | |
Senior Member
Join Date: Jul 2014
Drives: 2020 Hakone
Location: London, Ont
Posts: 69,845
Thanks: 61,656
Thanked 108,286 Times in 46,456 Posts
Mentioned: 2497 Post(s)
Tagged: 50 Thread(s)
|
Quote:
__________________
Racecar spelled backwards is Racecar, because Racecar.
|
|
The Following 2 Users Say Thank You to Tcoat For This Useful Post: | Irace86.2.0 (05-26-2019), mgarcia707 (05-24-2019) |
05-24-2019, 02:07 PM | #33 | |
Lowly Cartuber
Join Date: Jul 2016
Drives: 2016 BRZ, 2005 Honda S2000
Location: California
Posts: 904
Thanks: 41
Thanked 422 Times in 281 Posts
Mentioned: 13 Post(s)
Tagged: 0 Thread(s)
|
Quote:
Point being, even if you are under the db limit, if your car has a ton of pops and rasp and makes a ton of noise that most exhausts dont make, you'll be pulled almost guaranteed.
__________________
2016 Limited MT WR Blue BRZ | Delicious Flash n Go Tune | Delicious Flex Fuel Kit | Nameless 2.5" with 5" Mufflers | JDL UEL Headers | Bayson R Diffuser/Side Skirts | APR Front Splitter | VIS Racing GT Wing | ST Suspension Coilovers | Grammlights Rays 57CR 17x9 +38 | Sumitomo HTR Z iii 235/45/17 |
|
|
The Following 2 Users Say Thank You to Xxyion For This Useful Post: | mgarcia707 (05-24-2019), Tcoat (05-24-2019) |
05-26-2019, 07:37 PM | #34 | |
Senior Member
Join Date: Mar 2017
Drives: Q5 + BRZ + M796
Location: Santa Rosa, CA
Posts: 7,884
Thanks: 5,668
Thanked 5,806 Times in 3,300 Posts
Mentioned: 70 Post(s)
Tagged: 0 Thread(s)
|
Quote:
It definitely sounds loud (see video below for awesome sounds). Just like how the Euro model has a muffler, I thought the California model might come with a muffler. They obviously make Federal and California emission vehicles, so I figured there might also be different versions too or an exhaust valve like what Mustangs have. [ame]https://www.youtube.com/watch?v=wfQ73shGGoc[/ame]
__________________
My Build | K24 Turbo Swap | *K24T BRZ SOLD*
|
|
05-28-2019, 11:54 AM | #35 |
IG: @nickwiththefrs
Join Date: Sep 2015
Drives: 2016 Scion FR-S Halo
Location: Alameda, CA
Posts: 668
Thanks: 432
Thanked 305 Times in 205 Posts
Mentioned: 19 Post(s)
Tagged: 3 Thread(s)
|
I got pulled over the other night on 101 South in SouthSF by CHP. He said he pulled me over for exhaust and made me pop my hood. He didnt find anything. Also mentioned that my car is too low and mentioned something about headlight height from the ground, which i knew about. Didn’t cite me for anything, just gave me a verbal warning and let me off.
|
The Following 2 Users Say Thank You to thecarfilmer For This Useful Post: | mgarcia707 (05-29-2019), Tcoat (05-29-2019) |
05-29-2019, 03:41 PM | #36 | |
Member
Join Date: Jul 2017
Drives: 2015 FR-s
Location: Santa Clara
Posts: 32
Thanks: 4
Thanked 18 Times in 10 Posts
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
|
Quote:
Are your rear windows tinted? Cops hate tinted windows, monster chrome exhaust tips and big subwoofers. The MR2 in my sig was low and loud. I got away with it due to: luck, no window tint, boring looking exhaust tip, but mostly because I look like an old white dentist. |
|
The Following User Says Thank You to candygram4mongo For This Useful Post: | N8RH8R (05-30-2019) |
05-29-2019, 04:47 PM | #37 | |
Senior Member
Join Date: Feb 2013
Drives: Whiteout FRS
Location: San Francisco
Posts: 1,247
Thanks: 904
Thanked 414 Times in 296 Posts
Mentioned: 31 Post(s)
Tagged: 2 Thread(s)
|
Quote:
No more than 54" high or 22" low. iirc, Nick has a Tomei type-80. Not the best exhaust in terms of loudness (at 4.5k rpm it's def over 100 db w/o silencer). I have had mine on for about 5 years (catback only and 90% of the time w/o silencer) and have not been pulled over at all for it. I think it really depends on how you are driving and whether or not the LEO is looking for a target. |
|
The Following User Says Thank You to Bach415 For This Useful Post: | finch1750 (05-29-2019) |
05-29-2019, 05:18 PM | #38 | |
IG: @nickwiththefrs
Join Date: Sep 2015
Drives: 2016 Scion FR-S Halo
Location: Alameda, CA
Posts: 668
Thanks: 432
Thanked 305 Times in 205 Posts
Mentioned: 19 Post(s)
Tagged: 3 Thread(s)
|
Quote:
Im running 5% tint all around and rolled them down once i saw the cop put his lights on. Wasnt speeding at all, i was in the slow lane passing 280 on 101 exiting Paul Ave. |
|
05-30-2019, 01:04 PM | #39 |
Lowly Cartuber
Join Date: Jul 2016
Drives: 2016 BRZ, 2005 Honda S2000
Location: California
Posts: 904
Thanks: 41
Thanked 422 Times in 281 Posts
Mentioned: 13 Post(s)
Tagged: 0 Thread(s)
|
While there definitely is a difference, the problem is that the test for noise compliance is the car stationary and holding revs at the RPMs the car would be at for cruising. Which means the turbo isnt adding any sort of muffler effect which means its louder.
__________________
2016 Limited MT WR Blue BRZ | Delicious Flash n Go Tune | Delicious Flex Fuel Kit | Nameless 2.5" with 5" Mufflers | JDL UEL Headers | Bayson R Diffuser/Side Skirts | APR Front Splitter | VIS Racing GT Wing | ST Suspension Coilovers | Grammlights Rays 57CR 17x9 +38 | Sumitomo HTR Z iii 235/45/17 |
|
The Following User Says Thank You to Xxyion For This Useful Post: | Tcoat (05-30-2019) |
05-30-2019, 01:08 PM | #40 |
Senior Member
Join Date: Mar 2017
Drives: Q5 + BRZ + M796
Location: Santa Rosa, CA
Posts: 7,884
Thanks: 5,668
Thanked 5,806 Times in 3,300 Posts
Mentioned: 70 Post(s)
Tagged: 0 Thread(s)
|
Exactly
__________________
My Build | K24 Turbo Swap | *K24T BRZ SOLD*
|
06-01-2019, 02:58 PM | #41 |
Member
Join Date: Jul 2017
Drives: 2015 FR-s
Location: Santa Clara
Posts: 32
Thanks: 4
Thanked 18 Times in 10 Posts
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
|
That's messed up. Sometimes you do everything right and still get pulled over. Not anything you can do but roll with it I guess.
|
|
|
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
Popped a side marker? | Fever | Cosmetic Modification (Interior/Exterior/Lighting) | 7 | 08-22-2017 07:03 PM |
Tires popped | SquadRogue | Scion FR-S / Toyota 86 GT86 General Forum | 241 | 02-14-2015 12:25 AM |
Just Popped the Cherry...Now What?! | LowPhat 4g | Scion FR-S / Toyota 86 GT86 General Forum | 20 | 08-11-2013 08:29 AM |
FR-S cherry popped | NMMI89 | Scion FR-S / Toyota 86 GT86 General Forum | 8 | 10-11-2012 10:06 PM |
Popped out to buy some milk... | lordgrover | FR-S & 86 Photos, Videos, Wallpapers, Gallery Forum | 27 | 09-06-2012 07:31 PM |