Arvinode system reproduction

Hi!I haven't ascertained if my Jan 65 K is an ARVINODE car but I believe it is in the range.Also NPD is looking to reproduce this system as well,and are looking for parts and diagrams.Maybe I'll crawl under and check this weekend.My car has some of the original exhaust hangers.I am interested in this system,Thanks and HAPPY HOLIDAYS!RANDY

I'd be interested.

Would your manufacturer be able to reproduce the quinkie tube mufflers, or would you just use glasspacks or something like that?

I would be interested in learning more.

I would be interested in at least 4 systems.

What would be the chances of getting some sound clips from the mufflers they are considering?

Here is a picture of both left and right NOS FoMoCo arvinode hangers.

The tailpipe hanger uses a piece of whitewall from a goodyear power cushion tire. The tailpipe hanger is not FoMoCo, but is an old stock replacement part, probably made at the same stamping plant.

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Edited by - toolbox on 12/15/2007 04:45:19

size changed

Edited by - toolbox on 12/15/2007 04:46:49

Did he mean a " sound track of a hipo with its original arvinode <img src=images/icon_smile_question.gif border=0 align=middle> system intact, running? ".

I ran an Arvinode system on an early Fairlane from 1972 through 1977. At the time I had a 1962 Fairlane and wanted dual exhaust, so I went down to my local Ford dealer and bought the 289 HiPo exhaust manifolds, H-pipe, and both Arvinode muffler assemblies brand new from Ford (for $110 -- those were the days when $110 was a lot of money). I know what it sounds like. Few today would find the noise objectionable. A low rumble would best describe it. Noise level at cruise would make listening to the radio a bit strong on bass! My wife always thought it was too loud, but I thought it was about right for projecting what a car with muscle should sound like. I also liked that fact that when you got into the throttle in a big way, the noise level did not become poppy like straight cherry bombs would do. The rumble just got more intense, but stayed low in frequency. I think the rear resonators really helped eliminate the popping and kept the tone mellow. These were the days of leaded gas and for those fondly remembering those high-octane days have probably forgotten how hard it was on the exhaust. In five years the mufflers had rotted from the inside out. When I removed the system, I saved the resonators for a long time, but they rotted out in dry storage. I managed only to save the pipe sections which held up well.

In case you are wondering, I was running the system behind a 289 4V with C9OZ Muscle Parts cam (hydraulic version of the HiPo), special valve springs and hardened retainers, and dual point conversion kit -- all from my local Ford dealer. The rear was a 3.50:1 (8" at the time). I was shifting with a close ratio T-10 with Hurst Competition Plus shifter. Engine was probably putting out about 250-260 hp max at 5500 rpm (estimated, never tested).

Anyway, I can say that having lived with the system in a daily driver for 5 years, the system was awesome-sounding!

I would be interested. Could GT extension tips be added to this system?

Bob's story matches my memories of the sound of a HiPo Arvinode system. I ran one on my '64 Fairlane with a factory K engine that I bought over the counter in 1969. The sound was truly unique, and I'll always remember the authoritative "rap" that came out of the tailpipes when I fired the engine up. When the engine tached up it was loud, but not "false" like the typical glasspack mufflers were.

Later, in 1974, I purchased another set of Arvinode pipes from Ford to install on my '65 Comet Cyclone, which had an "A" code 289 built to HiPo specs with the solid lifter cam and GT-40 valves. It had the same distinct sound as the Fairlane, and I guarantee there is nothing that matches that sound on any other factory exhaust system.

After doing a little research on the Arvinode mufllers here's what I've come up with-

The Arvinode's didn't use the conventional methods of exhaust silenceing like absorbtion (glasspacks) or baffles (traditional chambered muffler), but instead used what is known as a Herschel-Quincke tube. That's kind of like a 1/4 wave tuner. Or a trombone slide. That is what the little tube that runs along the top of the mufflers was for.

The way I understand it, the wavelength of the particular frequency that was to be silenced is calculated out, and the tube is one quarter the length of the wavelength. The tube is connected to the exhaust pipe at the front, but dead-ends at the back. So, the sound wave goes into the tube, travels 1/4 of its length and at the back of the tube it is reflected back to the entrance of the tube traveling another 1/4 of its length. Now, the wave has traveled a total of 1/2 of its wavelength. It is now 180 degrees out of phase with the original wave, and through a process known as "destructive interference" the sound waves cancel eachother out.

This is the same thing that happens if you wire a set of speakers, and one is wired backwords, they go out of phase, and the volume ends up quieter.

I have never actually seen an Arvinode system in person, but I have seen this type of exhaust system (Herschel-Quincke) on large, indoor, V-12 diesel generator motors. In those instances, the tube is actually perpendicular to the exhaust system. It probably works better that way, but would be totally impractical for automotive use.

I believe this is what gave the Arvinodes their distinctive sound, but I would have no idea whatsoever on how to calculate wavelength, pipe length/diameter, or how to assemble such a device onto the muffler. But I do think that the little tube is the key to the whole system.

I'm sorry if this info is too little too late for round2K's current project, but I thought I'd throw it out there anyhow.

My disclaimer: I've never designed a muffler or worked in a muffler factory. I'm not a scientist, acoustical engineer, or anything like that at all. The top end of my acoustical knowledge comes from being a music minor in college, so please keep that in mind. I've been wrong before, so I might be totally off-base with this too. But it does seem plausible to me.