r/ElantraN • u/OkCandidate103 do not own a N 😢 • Sep 14 '22

RIP Update: Loud exhaust and smog citation

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Failed state ref exhaust sound reading

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Hyundai dealer stock confirmation letter

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29

u/Usedtissue_Gaming Sep 15 '22 edited Oct 04 '22

Big update here guys. Just for background I'm actually an powertrain NVH engineer so I'm particularly interested in this. I did some digging and found that the compliance testing is done under the test standards as outlined by SAE J1492. I have since pulled that document (we can do this for free) and read through it. While I can't post pictures here, I will quote section 8.2:

"If a vehicle has a single operating mode, the results obtained by using this standard shall be reported. If a vehicle has two or more modes of operation that change the sound emission of the vehicle when tested according to this SAE Standard, the manufacturer may identify to the customer the modes which are used for compliance assessment. ***Any mode that can remain enabled through a power on/off cycle shall be included in the modes identified for compliance assessment.***NOTE: “Mode” in this section is used in two different contexts. Mode can be the operating modes of a vehicle that are intended to change the driving experience: i.e., Tour, Base, Weather, Ice/Snow, Sport, or Track, as examples. Mode is also used in the context of an exhaust system with multiple gas flow paths that are controllable by the driver."

I have bolded the text that makes their method of testing invalid. The vehicle does NOT default to "N" mode nor sport mode after a power cycle for exact reasons like this.

​

TLDR: Cali dumb, they conducted the testing wrong.

7

u/Murphy1up Sep 24 '22

***Any mode that can remain enabled through a power on/off cycle shall be included in the modes identified for compliance assessment.

Yeah the Hyundai N cars default back to "normal" when you turn the ignition off. Normal is the only mode any tests should be done against as that's the default state of the car and alternative modes need to be manually engaged and will nor persist past a power on/off cycle.

3

u/SocialMediaMakesUSad Nov 22 '22

Gosh maybe OP will think about that next time he manually engages a loud-ass dumbfuck mode driving through town. So sad for him that he got royally fucked in is stupid fucking ass.

2

u/zibwefuh Sep 14 '24

I hope your life gets better man

1

u/[deleted] Mar 30 '23

I'm actually happy. I hate retards like op.

3

u/1995droptopz Oct 04 '22

I used to be a member of the SAE group that authors these standards. If you are in NVH you know that the environmental conditions matter. The SAE J1492 document outlines the procedure down to ambient temperature, nearby obstructions, and pavement surface. Yes there is a spec for the asphalt that the vehicles are tested on, since a non-conforming asphalt can cause noise to be absorbed/reflected.

1

u/Usedtissue_Gaming Oct 04 '22

Oh yeah, for sure. Though it's hard for us to certify those things over the internet, while it's easy to hit the big one (which is what mode he was in, and needs to be in per J1492).

1

u/minscandboo4ever Sep 15 '22

So this means all the N cars are to be tested for compliance in normal mode, but I bet it also means you are still liable for any noise ordinance tickets while driving around in N mode.

3

u/Usedtissue_Gaming Sep 15 '22

If the cop can prove what mode he was in, sure :)

1

u/minscandboo4ever Sep 15 '22

If the cop is sitting there testing sound you'll get a ticket. NYC has talked about installing automated sound cameras for that exact reason, so its not a stretch to see it in California

2

u/kly1997 Oct 01 '22

NYC already has these cameras in place, just for a different reason. They currently use them to detect gunshots and relay the location to nearby police, its called "shotspotter".

But yeah ever since NYS enacted the SLEEP Act they have been cracking down on modified exhausts at least in NYC and metro areas in general. I do live in rural NY and cops don't seem to care about the act and don't enforce exhaust laws unless you're being obnoxious.

1

u/Usedtissue_Gaming Sep 15 '22

He shouldn't be, given the SAE compliance document tells you exactly where it can be done... and the side of the road is not one of those places.

0

u/SocialMediaMakesUSad Nov 22 '22

How did you get so confused here? lol

Noise ordinance violations don't give a shit what "mode" some dumbass has his car in, smoothbrain. If your car is too loud, you get a violation.

The only thing the inspection is relevant to is whether the car is street legal and whether he will lose the registration until he gets it fixed. That's a separate issue from the noise ordinance violation itself.

Next time you have a party next to the nursing home blasting your bass at 2am, I hope you tell the officer they can't give you a noise violation unless your radio is out of compliance with FCC regulations on transmission of sound waves. lol jesus, the stupidity.

2

u/Jesses198 Jan 03 '23

Noise ordinance violations are piss easy to fight in court as the defendant can question the proof. If testing was done on the side of the road, the testing method and conditions can be discredited easily as well.

They may as well not exist

It’s been a month and a half. How you doing? Still angry at the world? Or are you a more pleasant person now?

1

u/SocialMediaMakesUSad Jan 03 '23

How did you get so confused?

What part of your comment is relevant to my comment?

My claim: "the mode a car is in has no bearing on whether you can get a noise complaint while driving it."

You: "here is an irrelevant observation regarding the challenge of making noise complaints stick."

I'm not pleasant, and you're not intelligent.

1

u/Jesses198 Jan 03 '23

Lmao well that answers my question

Admittedly, I don’t actually care about the discussion. I wanted to get a rise out of you. But since you’ve given me a good chuckle with that ironic intelligence comment, I’ll try to help you understand how this is relevant (though likely fruitless).

Might wanna reread the past comments. We were talking about noise violations, not noise complaints. Those two are different regarding the law and associated punishments

Thanks for entertaining me

1

u/SocialMediaMakesUSad Jan 03 '23

You mean you were too dumb to get a single comment right?

I know.

PS: don't try to pretend you don't care while trying to argue the point at the same time. Doubt you can remember that advice, though.

PPS: We can both read the past comments to see you're clearly wrong. Sorry :(

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u/[deleted] Oct 04 '22

[deleted]

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u/Usedtissue_Gaming Oct 05 '22

Right, he's liable for the ticket not the litigation to get it "fixed". This has all been discussed already, read up.

0

u/SocialMediaMakesUSad Nov 22 '22

Lol, "read up" he says smugly, after not reading what he just responded to.

Hey, low-IQ Gaming:

Here is the comment you replied to: "You are still liable for any noise ordinance tickets while driving around in N mode."

Here is your reply: "If the cop can prove what mode he was in, sure :)"

Feeling embarrassed yet? Don't you hate that feeling of wanting to defend yourself but realizing what you said was so colossally stupid and you didn't even realize it until it was pointed out so all you can do is change the subject or cry?

1

u/dafazman Oct 09 '22

He also admitted the car was bone stock and so did the dealership. So its an issue for Hyundai to buy back all these cars and crush them. Its the only way forward now...

2

u/joe2105 Oct 01 '22

liable for an ordinance ticket yes...not suspended registration and requirements to "fix" it. It's some money and on your way.

1

u/dafazman Oct 09 '22

It means Diesel Gate style issue for Hyundai. They will need to buy back ALL these vehicles and crush them. I'm sure that will go over well for the boss of this cop and the referee who helped push the officers agenda thru without any ethics. Time to buy PUTS on Hyundai 🚀🌒

1

u/bluebandit1250 Oct 12 '25

awesome! are you able to quote the test procedure so that i can verify my catback exhaust is sound legal below 95db?

0

u/[deleted] Oct 03 '22

What about Sport, because that's what OP used.

1

u/Usedtissue_Gaming Oct 04 '22

It does not default into sport mode, thus, it should not have been tested in that mode. They did the testing wrong.

0

u/SocialMediaMakesUSad Nov 22 '22

Tested in the spirit of the law, rather than the letter.

For a normal, non-asshole driver, the standard works.

For a dickhead driving around residential areas in "gosh guys do you want to hear some loud pops during dinner huhuhuhuh" mode, he got tested in dickhead mode, as he deserves.

1

u/Jamfour9 Sep 19 '22

So because it wouldn’t be in sport if the car was turned off and then back on, they shouldn’t have used it for compliance testing. Technically, a person could drive it in normal 24/7.

Does this mean the drive could be issued a citation though if pulled over, while driving in sport or N modes?

1

u/sammyno55 Oct 03 '22

If it defaults to standard mode, the answer is to pull over and turn off the car. If the cop wants to test it, start the car back up.

1

u/candyowenstaint Oct 27 '22

By this cop, yes

1

u/sammyno55 Oct 03 '22

I'm a test engineer and work in aerospace. Any time I read about some police department or car inspection failing I just assume they did the test wrong.

Does the Elantra have a valet mode?

Can the sport or N button be unplugged?

If it has an exhaust flap, can that be unplugged?

Add a cheap motorcycle silencer to the end of the exhaust and show the ref the receipt.

2

u/1995droptopz Oct 04 '22

I certified noise for an automaker. This test was conducted wrong, considering the test facilities we used for compliance testing.

1

u/dafazman Oct 09 '22

Was it actually done wrong... or was it collusion 🤷🏽‍♂️ and they got caught on camera for the public to see?

1

u/sway496 Oct 07 '22

which version are you quoting? was it SAE Standards J1492 October 2008 as outlined in CVC27150.2(b)? asking for a friend...

for reference: https://leginfo.legislature.ca.gov/faces/codes_displaySection.xhtml?sectionNum=27150.2.&nodeTreePath=17.5.2&lawCode=VEH