Exhaust Cutout/Whistle

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Model T Ford Forum: Forum 2009: Exhaust Cutout/Whistle
Top of pagePrevious messageNext messageBottom of page Link to this message  By brian c lawrence on Sunday, July 26, 2009 - 02:27 pm:

I picked up an exhaust cutout at the Iola car show for a whopping $1.00. I bought it because Ive had an exhaust whistle (like an Aeremore, I believe) laying around for many years. I also bought the pedal for $25.00. My questions are


1. Do these whistles work pretty good or not? Worth putting on?

2. The butterfly is in the cutout valve, so when it is open, some exhaust will still go through to the muffler. Is this right? Seems to me that the butterfly should divert ALL exhaust.

Any advice/ opinions/experiences would be helpful. Thanks

Brian


Top of pagePrevious messageNext messageBottom of page Link to this message  By Frank Harris on Sunday, July 26, 2009 - 02:45 pm:

There were several different types. If they have a single butterfly valve all exhaust goes through the whistle. If they have a double set of butterflies only some of it diverts, but they are all different.

Had a huge Aermore on my 1913 Cadillac with its 366 cubic inch four cylinder engine. Could peel paint off of road signs at 100 yards with that thing when it went into overtones at high speed. There are several different sizes of Aermore whistles and other brands as well. The worst kind of valve is the stamped sheet metal model. They leak all the time and your whistle will hum all the time the engine is running. The cast iron ones are the better choice and are very positive.


Top of pagePrevious messageNext messageBottom of page Link to this message  By Ed on Sunday, July 26, 2009 - 02:47 pm:

They work really good and loud. You must divert all the exhaust through they whistle to make it sound off well. It may still work only partially diverted, but you will have to be at speed or revving the engine.


Top of pagePrevious messageNext messageBottom of page Link to this message  By Lance Sorenson on Sunday, July 26, 2009 - 03:33 pm:

After reading this older thread, you will see that people have mixed results with whistles. I bought a numer two Fuller Aermore and can't get much noise out of it. I used a vacuum cleaner to blow into it, which proved that it works. By removing the muffler and completely blocking the pipe I get some noise but it won't peel any paint. Is it a size problem, a cut out design or didn't they ever work on a T?

Here is link of a Model A blowing his horn.
http://www.youtube.com/watch?v=luAGuTgpyYU

old forum link:
http://www.mtfca.com/discus/messages/29/10904.html


Top of pagePrevious messageNext messageBottom of page Link to this message  By Frank Harris on Sunday, July 26, 2009 - 04:43 pm:

You can tune them by adjusting the shape of the thin membrane where the air comes out. That is the critical place and must be within thousandths of an inch of being right on in order to make it blow. The bigger the engine and faster it is running the more noise you get.

Rule of thumb: little engine little whistle big engine big whistle. Don't try to drive a spike with a tack hammer. And, don't use a sledge hammer to hang picture nails and carpet tacks


Top of pagePrevious messageNext messageBottom of page Link to this message  By brian c lawrence on Sunday, July 26, 2009 - 10:48 pm:

Frank,

Maybe if I decide to put this thing on, and Im not really happy with the whistle, I can leave the "cutout" in the exhaust pipe. My Grandpa always told me that he had a cutout in his T way back when and it helped for the hills. I know that peoples memories are not the graetest and looking back things were always better than they were, but having the cutout on its own would be good (maybe kinda cool?). Thoughts ideas? :-)

Brian and Nate


Top of pagePrevious messageNext messageBottom of page Link to this message  By Barry W. Fowler on Sunday, July 26, 2009 - 10:53 pm:

Brian: I have a cutout on my 12 roadster and have to climb hills every time I drive home. I have heard, as you, that people used the cutout to obtain more power. My experience is if there is a difference, I cannot notice it, but it does make more noise and a good story.

Barry


Top of pagePrevious messageNext messageBottom of page Link to this message  By Frank Harris on Sunday, July 26, 2009 - 11:18 pm:

The President of our Horseless Carriage Club regional group has a 1917 Dodge Touring. He swears that he gets another five horsepower out of that four cylinder Dodge with the cut-out open. Besides it makes it sound like it has hair on its chest and large cajones. Why not ?

My Model T has a three and a half inch diameter exhaust pipe with no muffler at all and puts 46.8 horsepower to the pavement. Mufflers are for wimps. At cruising speeds it makes hardly any noise at all and only gets offensive when I get into it at speed or under a load at low speed.


22


Top of pagePrevious messageNext messageBottom of page Link to this message  By Seth Harbuck, Shreveport, LA on Monday, July 27, 2009 - 01:55 pm:

Frank,

The 4.4 litre OHC V-8 '21 Wills Sainte Claire I'm working on has dual exhausts with no balance pipe. It also has floor-mounted controls, one each side, to operate the exhaust dumps. Came from the factory that way.

Though the Wills' compression ratio isn't but 4.1:1 (imagine that :-) ) it makes quite a racket with them open.

You can bet I'm going to open them the first time I drive it!

Seth


Top of pagePrevious messageNext messageBottom of page Link to this message  By brian c lawrence on Monday, July 27, 2009 - 08:28 pm:

Frank,

Im really thinking now that having the cutout would at the very least be a neat accessory. My old Fordor still won't be fast , I'm sure, but one more thing to play with. One thing I like about these old T's is all the input required from the driver. Should I put the cutout closer to the manifold or closer to the muffler?

p.s. who'da thought that these whistles were that precise as far as making them sound right/


Brian Nate


Top of pagePrevious messageNext messageBottom of page Link to this message  By Tom Lovejoy on Tuesday, July 28, 2009 - 12:09 am:

Bryan O - from Cal has one on his 22 touring. I was amazed how loud his was. You can hear mine but its weak, when bryan hit his, people were jumping out the way and looking like what the heck was that. If I remember right I think he said he tunned his carefully. If you know what to do and pay attention to detail, you can make em loud - hope to do mine better some time, good luck.


Top of pagePrevious messageNext messageBottom of page Link to this message  By David Dewey on Wednesday, July 29, 2009 - 01:27 am:

there's a whole discussion group on whistles, not really exhaust whistles, but regular ones. They spend a lot of time on calculations to make efficient whistles, and tuned ones too. Here's the URL in case anyone wants to check it out.
http://groups.yahoo.com/group/steam-whistles/
T'
David D.


Top of pagePrevious messageNext messageBottom of page Link to this message  By Ed on Wednesday, July 29, 2009 - 09:23 am:

The No. 2 Aermore is the perfect size for the T. The trick is to use a narrow pipe elbow coming out of a narrow cut-out. This diverts the exhaust with enough pressure to really toot.


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