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Author Topic: Air Horns  (Read 4777 times)
DavidInWilmNC
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« on: November 15, 2007, 11:37:14 AM »

My MC-8 still has the 'Cadillac style' electric horns.  They're loud, but not loud enough!  I've ordered one of these http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&item=290181087460.  It's certainly cheap enough, and, while not particularly attractive, it should be fine mounted down in the spare tire bay.  It's not something I'd want roof-mounted, although if painted, it probably wouldn't be too bad.  It has a 24 volt solenoid valve, so it should be an easy install, once I find where to tap into the air supply.  The seller has several of these, if others are interested (I am not associated in any way with this seller but am just passing on the info, in case it'll help another busnut).

I'm thinking that I can follow the lines from the air wipers to wherever they connect to the air system and hook in there.  What sort of air line and fittings should I use?  I'm almost tempted to use some regular air hose, like what's used for a home compressor, that's rated up over 200 PSI.  Would this be risky, or would it be ok for something like an air horn in a location where heat won't be an issue?

David
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TomC
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« Reply #1 on: November 15, 2007, 12:51:57 PM »

However or wherever you hook it up, use either a quick release fitting or a valve so you can cut it out in case of problem-it will prevent you a stranding possibly.  Good Luck, TomC
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Tom & Donna Christman. '77 AMGeneral 10240B; 8V-71TATAIC V730.
DavidInWilmNC
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« Reply #2 on: November 15, 2007, 01:35:52 PM »

However or wherever you hook it up, use either a quick release fitting or a valve so you can cut it out in case of problem-it will prevent you a stranding possibly.  Good Luck, TomC

That, and from those folks who think it's funny to blow the horn while one's working on a vehicle.  I'd be quite pissed if somebody blew the air horn while I was working in the spare tire compartment!

David
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TomCat
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« Reply #3 on: November 15, 2007, 03:12:56 PM »

David,

I recently installed a set of Grover 1601 air horns on my coach. Since I had removed the air operated jack knife skoolie doors a while back, I controlled the loss of air from that black DOT air line by folding it over and clamping a small set of vise grips on it.
When I installed the Grovers, I clipped that black DOT air line off square, then went to ACE Hardware and bought some 1/4 inch clear air line rated for 130 lbs, the required fittings to connect to the black DOT line, and the electric/air solenoid to the clear air line from ACE in my coach electric access. Then it was a simple run up to the horns.
Not wanting to spend much on an air horn button, I bought a $2 door bell switch which works great, until I get my new panel built.
I like having the option of twin electric horns, or LOUD air horns! Just gotta remember to NEVER blow them with the window open...OUCH!

Jay
87 SaftLiner
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« Reply #4 on: November 15, 2007, 03:25:18 PM »

Are these horns metal or plasitic? Have your heard them?

Fred. Mc  GM PD4106
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DavidInWilmNC
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« Reply #5 on: November 15, 2007, 03:46:13 PM »

Are these horns metal or plasitic? Have your heard them?

Fred. Mc  GM PD4106

Fred, here's the info I received from the seller:
Quote
yes it is metal...I believe that it is steel...there is some sort of mounting bracket, screws on the back...it is about 14 inches long and about 4-5 inches wide and a couple of inches thick....hope this helps...

He also says they are loud.  I'm sure they're not as loud (nor as attractive) as TomCat's Grovers or the big Hadleys, but they are cheap.  I'll hook 'em up to my air compressor and check the loudness when they arrive.  If nothing else, they'll be an improvement over the stock horns 'til I get the BIG horns... or maybe a train horn.   Wink

David
 
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grantgoold
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« Reply #6 on: November 15, 2007, 05:29:50 PM »

As soon as you get them, please post or send me an email. I am looking to do the exact same things as you. I want to mount them in the spot of the old horn and will wait for your endorsement.


Grant
Citrus Heights

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Grant Goold
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« Reply #7 on: November 15, 2007, 07:12:00 PM »

Here's a photo of Davids horns and a photo of what they look like installed in a military vehicle

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NJT5047
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« Reply #8 on: November 15, 2007, 07:47:50 PM »

I bought a set of Ebay air horns that were similar to what David posted.  Maybe $90 bucks shipped and with a separate electric air control valve. Supposedly used on a Mil Hummer.  I doubt it, but they work fine.   Had to buy a solenoid to control the things.  Came out of Texas if I remember.
Used 1/4" DOT tubing for power.  Very loud.  Sound just like a truck. 
If your 8 is like my 9, on the RH upper frame about 2' back from the front, there's a "block" with air fittings on it.  A couple ports are blocked off.  The air was supplying the door cylinders.  If you have such a junction block...good place to tie in.  Be careful when removing air plugs or lines.  If any air on the bus.... Shocked
120 lbs will blow the horns.  1/4" DOT hose is what most truck horns use.
I mounted mine beneath the tool compartment floor.  When the bus is aired up, they are not likely to hit anything...if they get hit, the horns will be the least of my worries. 
I wired the solenoid into the old horn wires. 
The horns are protected from most road spray and trash since they are essentially behind the bumper.   Two years and still going!
David, where you gonna mount the horns?  They'll be just as loud as any other truck horn.
I'd get them outside the spare tire compartment.   Someone's gonna pee in your co-pilot seat if you honk those things and they are inside the spare tire comparment.  Also really nulls out the outside sound.  I tried that and ended up moving them below the window wash tank.  They were mega-noisy inside the spare tire compartment.  Terri would get PO'ed every time I blew the horns.  You gotta check'em occasionally!  Grin
JR



« Last Edit: November 15, 2007, 07:50:51 PM by NJT5047 » Logged

JR Lynch , Charlotte, NC
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« Reply #9 on: November 15, 2007, 08:52:45 PM »

Hhmmmm let me thimk here for a second........ ah yes that's right the new dually has an on-board air compressor for the air-ride ..... Ah huh! Yep sure enough! Thanks for the idea on a new toy David! Whoop, whoop! Grin  BK  Grin
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« Reply #10 on: November 15, 2007, 09:12:37 PM »

semi wrecking yards are a killer place to find a set of air horns. you can get shiney Hadleys for about $55 a piece, give or take.

kyle in norcal
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kyle in norcal
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DavidInWilmNC
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« Reply #11 on: November 15, 2007, 09:14:38 PM »

So, do I need a pressure regulator to keep from blowing the horns when I blow the horns?  I was wondering if the bus pressure might be a bit too high.  As for mounting them, maybe I'll just spray 'em some other color and mount 'em on the roof, like everybody else does with their air horns.  I'll play around with them and see where they look ok and sound loud... on the outside, anyway.  Maybe I need to get one of those cheap air horn compressors and put another set in my Toyota.  I'm sure other drivers would look around for the truck when I blow it!

David
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JackConrad
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« Reply #12 on: November 16, 2007, 06:22:39 AM »

You should not need a pressure regulator. These horns are designed for a vehicle that has an air compressor.  All vehicle air compressors (that I know of) pump up to about 125 PSI.  We installed 2 pair of air horns (one set has a very low tone similar to a boat, the other has a  higher tone similar to a truck) in the tool compartment under the driver's seat in addition to the OEM electric horns.  Each set of horns have a separate switch. The horn buttons in the steering wheel are now labeled EMERGENCY ONLY. Hitting this switch activates all 6 horns. If I need even more sound, I can pull up on the valve for my train whistle.  Jack
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Barn Owl
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« Reply #13 on: November 16, 2007, 11:28:27 PM »

Air horns are so worth it! I rank them up there higher than Jakes. My trip out this spring I had an a-hole cut in front of me and did a quick stop. All I had was my electric horn to blow because my air horns where still sitting in the bay where the PO had left them. I decided then I needed to change that. I hooked my compressor to the horns and not much. Well that explains why they where disconnected. I took them apart, cleaned them, and gave them a tune up. Boy are they loud! On the GM they are mounted forward the drivers steer tire up in a small cavity. I thought that it was a odd place for them until I tried them. In their mount they blast at an angle toward the ground only to have the blast bounce up off the pavement right at the perfect height for cars (No joke, they will hurt your ears). My second trip out (now with the air horns working) it was dark and I was on an unfamiliar busy street. I was traveling down the far right side of the road when I found out that I had one block to be two lanes over in the far left. First lane change went OK, but as I was starting my second, a lady in a convertible top down Saab decided to ignore my turn signals and dash in beside me. What a b***h! Angry Well I couldn’t make my turn and we both were stopped parallel at the light, so I lay onto my beautiful air horns that were right beside her head. I think she saw Jesus. I’m still LMAO at the thought of the “mookey stink” (South park episode 110) she must have left on the seat of her car. Priceless!


South park episode 110 link; Mr. Hankey, The Christmas Poo, a true classic:

http://www.southparkzone.com/episodes/110/Mr.-Hankey-The-Christmas-Poo.html
« Last Edit: November 17, 2007, 07:31:43 AM by Barn Owl » Logged

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« Reply #14 on: November 17, 2007, 05:36:33 AM »

My experience with train horns was problematic. They dumped the entire air supply on the KW and set the brakes for low air in about 3 seconds! I disassembled the horns from the air rail, (Hacksaw if I remember right). I put air to each of the horns and picked 2 off the rail I liked. They still will dump the air tanks real fast though.
Truck horns are cheap, come in round or square to match your headlites and you can turn the bell in or out to change the sound to your liking.
Older trucks have a mechanical activator, (pull switch to release air to the horns). If a truck horn has been inactive for a while you will have to put some air through it for a while before the tone will stabilize.
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