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aqn
Gold Member
Posts: 819
Joined: Fri Oct 01, 2010 12:59 pm
Delivery Date: 30 Apr 2011
Leaf Number: 1333
Location: Austin, TX

Re: DIY Horn Upgrade Mod - Updated

Mon Sep 05, 2011 8:05 am

U023 wrote:I upgraded my honker today with the FIAMM horns. I mounted them away from the radiator to minimize impact to the cooling capacity. [...]
I used some stock L shaped aluminum mounted with self tapping screws to the aluminum impact absorber in the bumper.
It looks to me that the aluminum bracket is grounded. Is that correct?
Anna Nguyen

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U023
Posts: 23
Joined: Wed Nov 24, 2010 10:00 pm
Location: Berkeley CA

Re: DIY Horn Upgrade Mod - Updated

Mon Sep 05, 2011 2:20 pm

It looks to me that the aluminum bracket is grounded. Is that correct?
The brackets are not separately grounded. The aluminum impact absorber they are mounted to appears to provide sufficient ground.
Glacier White SL with QC.

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aqn
Gold Member
Posts: 819
Joined: Fri Oct 01, 2010 12:59 pm
Delivery Date: 30 Apr 2011
Leaf Number: 1333
Location: Austin, TX

Re: DIY Horn Upgrade Mod - Updated

Mon Sep 05, 2011 3:02 pm

U023 wrote:
It looks to me that the aluminum bracket is grounded. Is that correct?
The brackets are not separately grounded. The aluminum impact absorber they are mounted to appears to provide sufficient ground.
Thanks. That's what I meant: "aluminum impact absorber" not "aluminum bracket"!
Anna Nguyen

kraff55
Posts: 7
Joined: Wed Jul 13, 2011 4:53 pm
Delivery Date: 07 Sep 2011
Leaf Number: 5135
Location: La Canada Flintridge, CA
Contact: Website AOL

Re: DIY Horn Upgrade Mod - Updated

Wed Sep 07, 2011 10:40 am

Thanks so much, OrientExpress, for posting the DIY step-by-step.
As I have wheel ramps, I opted to access from underneath.
Very easy and straightforward.
Best $16.00 I ever spent!
****************************
Glacier Pearl SL-e
Reserved: 21 April 2010
Ordered: 14 October 2010
Received: 9 July 2011
****************************

geolizleaf
Posts: 13
Joined: Sun Jun 19, 2011 7:39 am
Delivery Date: 29 Aug 2011
Leaf Number: 7696
Location: Tucson

Re: DIY Horn Upgrade Mod - Updated

Mon Sep 12, 2011 5:30 am

Honked the wimpy horn the other day. wow, it sucked.. Thanks to this thread, put the Wulu 320T horns in from underneath.. Pretty easy painless mod. Thanks to all that have contributed especially OrientExpress!

Now the horn has authority...

Unlike others have said, I think the lock beep actually comes from the new horns too. certainly the alarm horn comes from them.
Order date May 15, 2011 via iPad
Delivered Aug 29, 2011
Daily round trip of 41miles uses 10KwH at 4.5cents/KwH..WOW

Vin 7696

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TomT
Posts: 10641
Joined: Sun Aug 08, 2010 12:09 pm
Delivery Date: 01 Mar 2011
Leaf Number: 000360
Location: California, now Georgia
Contact: Website

Re: DIY Horn Upgrade Mod - Updated

Mon Sep 12, 2011 9:39 am

No, the alarm horn and meep come from a separate sounder on the passenger side of the car.
geolizleaf wrote:Unlike others have said, I think the lock beep actually comes from the new horns too. certainly the alarm horn comes from them.
Last edited by TomT on Sat Nov 26, 2011 5:02 pm, edited 2 times in total.
Leaf SL 2011 to 2016, Volt Premier 2016 to 2019, and now:
2019 Model 3; LR, RWD, FSD, 19" Sport Wheels, silver/black; built 3/17/19, delivered 3/29/19.

jbrawn
Posts: 5
Joined: Mon Sep 12, 2011 1:56 pm
Delivery Date: 31 Aug 2011
Leaf Number: 7644

Re: DIY Horn Upgrade Mod - Updated

Mon Sep 12, 2011 2:49 pm

aqn wrote:I recorded the stock horn and the Fiamm El Grande with my Android phone. (Shoulda used my camcorder.)

Here are the two sound samples as viewed in AVS Audio Editor:
Image
I don't quite understand the dB scale on the right, why it's in negative numbers, but regardless, the difference is about 3 dB, which means the Fiamms sounds about twice as loud as the stock horn.
Hi Folks,
I'm new to this board, and I've only got 12 days of experience with my Leaf; but I do know a lot about audio.

Virtually every consumer recording device (phones, camcorders, MP3 recorders, etc.) have some type of Automatic Gain Control (usually called "AGC" or "Limiter") which attempts to record any sound at the highest level it can manage without distortion. When you record two different horns with the same device and look at them in a waveform tool, you still have no idea what their relative volume is unless you are able to turn off all of the various AGC-like circuits and software all along the signal path.

If you don't own pro quality recording or video equipment, then the cheapest way I know to get accurate relative sound pressure level measurements is with a hand held meter like this one: http://www.radioshack.com/product/index ... Id=2103667 which is $50 at Radio Shack.

Image

Perhaps the cheapest way to measure the comparison between horns is to put your favorite song on your MP3 player with your favorite ear buds in place and the volume set to a repeatable level, and slowly walk toward the car from a distance while some one else is honking the car's horn. Stop when you can clearly hear the horn above your music and measure your distance from the car. If you aren't considerably farther from the car with one horn compared to another, then they aren't very different in terms of loudness. This may not measure true differences in Sound Pressure Level (dB SPL), but it should give some indication of dB GIA (Getting an Idiot's Attention).

Taking all of that into consideration, the most important measurement of a car horn's loudness is probably just this: Does it sound louder to you?

Best Regards,

John.

Oh, the negative dB numbers on the screen are a measurement compared to "full scale" which is the highest waveform peak that can be defined by that particular bit depth. In other words, if the peak of a wave form reads -3 dB, then that peak is 3 dB lower than the maximum possible peak for that file type. Just to confuse things, peaks are measured with an amplitude form of dB, similar to dBV and this is different from power ratios like dB SPL or dBA. An increase of 10 dB SPL represents 10x as much power, 3.16x as much amplitude (e.g.: voltage on a speaker wire or height on a wave form display), and is perceived by most people as twice as loud.

gatico
Posts: 4
Joined: Sat Sep 17, 2011 12:25 pm
Delivery Date: 10 Sep 2011
Leaf Number: 7701

Re: DIY Horn Upgrade Mod - Updated

Sat Sep 17, 2011 12:35 pm

Thanks so much! I was honking the horn and trying to find out where it is. I was afraid the horn would be some kind of "integrated sound module." Glad it's simple!

What happens when you hit the lock button on the remote trying to find the car in the parking lot? Does the new horn honk loud enough to locate the vehicle? I was thinking that there might be a problem where the power to the horn is not supplied for an adequate time to "rev up" the bigger horn. If that happens, might have to add some circuitry to impose a few hundred ms "minimum honk time."

Leafboy
Posts: 173
Joined: Sun Jul 24, 2011 4:46 pm
Delivery Date: 12 Aug 2011
Leaf Number: 5721
Location: Atlanta, GA

Re: DIY Horn Upgrade Mod - Updated

Sat Sep 17, 2011 1:54 pm

gatico wrote:Thanks so much! I was honking the horn and trying to find out where it is. I was afraid the horn would be some kind of "integrated sound module." Glad it's simple!

What happens when you hit the lock button on the remote trying to find the car in the parking lot? Does the new horn honk loud enough to locate the vehicle? I was thinking that there might be a problem where the power to the horn is not supplied for an adequate time to "rev up" the bigger horn. If that happens, might have to add some circuitry to impose a few hundred ms "minimum honk time."
The horn is not a problem. The horn is a direct connection to B+ via a relay. But, the sounder for the lock/unlock is a different source.
Lew George
2011 Leaf SL-e
Cayenne Red
Longest continously owned Leaf in Georgia.
LED Upgrades: Parking lights, tag lights, back-up lights, side lights, interior lights,DRLs,LED Hi-beam.
Additional upgrades: Horn upgrade, pedestrian warning bell.

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TRONZ
Posts: 2240
Joined: Tue Sep 21, 2010 11:01 pm
Delivery Date: 31 Jan 2011
Leaf Number: 202
Location: Denver, CO

Re: DIY Horn Upgrade Mod - Updated

Sat Sep 17, 2011 2:01 pm

OK, we need a poll on this or something. So far plug-and-play choices are:

2 Piece 12 Volt Electric Horn Set (110db) - $12.99
http://www.harborfreight.com/2-piece-12 ... 99911.html" onclick="window.open(this.href);return false;

FIAMM 74100 El Grande - Twin Horns (???db) - $16.65
http://www.amazon.com/gp/product/B000DL ... PDKIKX0DER" onclick="window.open(this.href);return false;

Wolo Model 320-2T Maxi Sound Universal Red Low and High Tone Replacement Horns (???db) - $21.32
http://www.amazon.com/gp/product/B00029 ... PDKIKX0DER" onclick="window.open(this.href);return false;

PIAA 85112 115db 500HZ + 600HZ Sports Horn (115db) - $45.35
http://www.amazon.com/gp/product/B00079 ... PDKIKX0DER" onclick="window.open(this.href);return false;

HELLA 003399803 Supertone 12V High Tone/Low Tone Twin Horn Kit (118db) - $54.40
http://www.amazon.com/gp/product/B0030Y ... PDKIKX0DER" onclick="window.open(this.href);return false;

Stebel Nautilus Compact Motorcycle Air Horn (139db) - $54.99
http://www.amazon.com/Stebel-Nautilus-C ... B000NPRTII" onclick="window.open(this.href);return false;
+ Optional wire harness
http://www.amazon.com/gp/product/B0028Z ... Y7V3KR59AD" onclick="window.open(this.href);return false;


I ordered them by price. It would seem people are going for the FIAMM. Torn between FIAMM and PIAA.... Screw it. Going with FIAMM!
Every start, is as good as any start can ever be. - Douglas Darden

Stats;
2011 LEAF SL VIN#202, Delivered 01.30.11. Now, by far, the oldest LEAF in Colorado.

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