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Thread: James Diedrich Hallum, 5/18/32 - 7/19/16

  1. #91
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    Default Hallum's Ram’s Horn -B- Anzani pipes photo & other odd items.

    My previous posts referred to the rather unique different exhaust pipe systems for the Anzani -A- & -B- engines produced by Jim Hallum during the early 1960's. I did not have photos of those unusual pipe systems, still do not unfortunately, but have found some following a BRF thread lead web link.
    Much thanks to the photo website, www.outboardracing.com in Puyallup, WA (near Tacoma). It tells that the photos shown were mostly from Bob Carver or Hugh Entrop stored images.

    Walin’s trailer box usually carried the latest version of their original A & B Anzani for normal competition. Those engines also ran the higher-nitro fuel for the early Kilo record runs. In rather few years the set of power heads, tuned pipes, tower housings, and various geared lower units might at times fill the trailer box. The whole set of engine equipment available was always in flux with the maintenance, repairs, endless modifications, and limited time for it all.

    One year that Walin’s trailer carried all of the early specialty motors & pipe systems was for the 1966 APBA Nationals at DePue, IL and the week later NOA Nationals in Midland, MI. Midland also included Kilo trials so Gerry’s trailer carried the straightaway hull and the full special setup for that in A & B. The standard course competition engines were also in the trailer box. (Small photo, BRF_encyclopedia_ James Hallum_ p-3, in a Milwaukee motel parking lot).

    Included was the -A- “straightaway” Anzani with the diverter valved twin-pipe per cylinder system and the -B- “course race” Anzani with the newer “Ram’s Horn” expansion chamber pipes. The “mile/kilo record hull” is seen on the trailer waiting for the Midland-NOA speed traps.

    No photo of the 4-pipe -A- Anzani but here is a good photo of the original “Ram’s Horn” -B- Anzani first use in late 1965 or early 1966. Hallum rechecking the timing. These first-use -B-expansion chambers running normal course 25-30% nitro fuel produced power equal to or more than the same motor with std. megaphones & 45% nitro fuel used only for Kilo trials. The extremely steep power curve rise when the ‘bounce-pipes’ tuned in put excess stress on crankshaft & rods which was not produced by the high-nitro w/megaphone combination or the normal fuel w/megaphone pipes. Hallum was pleased with the Ram’s Horn pipes for dyno & course racing power but not happy with the resulting crank & rod issues. Too often twisted -B- cranks, some broken. Megaphones were used for Kilo records by needing the unrestricted low rpm power to haul the large props from planing to operating speed.

    Original Ram’s Horn -B- Anzani photo. Second photo is Lee Sutter in a later year use with the troublesome magneto removed.
    JH Rams B.jpg
    Sutter Rams Horn.jpg
    ===
    Now for a final surprise photos, a unique old motor setup that I added to those initial strange pipe building years of the early 1960’s Seattle scene. I did not remember that the photo’s existed, that anyone still alive had ever seen the motor, or that anyone remembered, so no chance of my mention of it. An old friend did remember seeing it so the best estimate of the build year was 1962 over winter. This was after the first Hallum valved twin-pipe test Tohatsu 50cc motorcycle use and maybe during the initial building of the -A- Anzani diverter valve 4 pipe system (which was a long process). It was a bit of a shock to see this old 55-H beast again. Set on a runabout for the photo shoot I guess. Time & money ran out for me & the motor after one test on my hydro. (Added photo of the Hallum Tohatsu 50cc moto later set up for 1/4 mile drag w/Jim Dunn riding).
    Russ Rotzler
    ===
    RR-55H-1.jpg
    RR-55H-2.jpg
    JD-3.jpg
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  2. #92
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    Default Sutters Gold

    Master Oil Team.
    Some quite wild happenings in those early 1960's Seattle years and they continued as many slightly later outboard racers know.

    I have tried to be careful in sorting my old memories but it has been tough to be certain. I hope that any discrepancies are small enough to not effect the larger story. The photo of Sutter under tow in his Ram's Horn piped Anzani is an example. If you examine the two photos of those curled pipes you will see that the pipe segment just downstream of the rope plate on Hallum's original has several weld beads which were where wedge shaped cutouts are used to shrink the tube to a smaller end diameter and to adjust the bend radius. On Sutter's pipes that segment is without several of those welds so that pipe set was built a little later. I probably should not have labeled the motor as a -B- Anzani since it could just as easily be an -A- and there is also a pretty good chance that Ron Anderson may have built that pipe set. Hallum and the Anderson brothers were busy (prolific) builders of good equipment and collaborated extensively. The record books and titles tell that story.
    R.R.

  3. #93
    Team Member smittythewelder's Avatar
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    Russ, you've really brought this thread to life with your stories from the day. I know how much you miss Jim at times, me too, but at least we know he would have got a charge out of reading it all. Also know that Jim's family very much appreciates this as a tribute to him.

    (EDIT} (1-20-18) Earlier in this thread, some were asking who else ran Anzanis, and we came up with a few names. But recently "Racingfan1" has been posting old newsletters with race reports from the '50s and early '60s, and if wou want to look through them there are quite a few Anzani racers mentioned, names we didn't recall. So FWIW, and if you haven't already seen them, here are two threads in the Outboard History section:

    http://www.boatracingfacts.com/forum...Racing-History

    http://www.boatracingfacts.com/forum...azine-articles
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  4. #94
    Team Member smittythewelder's Avatar
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    I'm wondering about an old project of Jim's. Russ, this would have been after your time, but maybe Mark D or some other insider from those days will know about it.

    After the loop-scavenged engines had completely obsoleted the cross-flow Mercs in most of the alky classes, APBA made a good rule, the deflector step-down rule, that allowed owners of those old Mercs to run them in the next smaller displacement class. They still wouldn't generally be competitive with the modern engines, but would have a better chance. At this time, Jim, a career OMC mechanic, took what I think was an old 18hp Evinrude, anyway the 20 cubic inch version, and started carving on it to make something that could be used to play around in A Hydro. It wasn't any kind of serious project, more something to do for fun and to see what the old Evinrude could do. Dual reedblocks and dual alky/nitro carbs, full porting, more compression and squish, a light flywheel, different ignition, megaphones. I have an idea that this project was set aside before it was ever finished. Does anybody know about this thing, and who ended up with the box of parts?

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    Default Full mod OMC small twin.

    Well Smitty, “after my time” sure did cover an extensive amount of Hallum’s continuing good work. Sorry to have missed most of it except a few races scattered over decades.

    Jim & I did talk a little about standard modifying potential of the smaller OMC deflector motors in the early 1960’s. The problem generally was the displacements didn’t fit racing classes. Oversize or gave away too much displacement. I am unfamiliar with the later “step down” rule by APBA you noted but it seems reasonable so folks could keep racing within their same budget.

    There is a very vague memory of the young Losfar boys running a small ‘sport runabout’ from the dock of the Mukilteo Marina/Boathouse using a ported & compression modified, open exhaust, Evinrude ... maybe a 25 HP. They might have run some of the local saltwater “wildcat” sport hull race events too. Only utility gear cases and no short tower housings from OMC in those days though.

    My guess about an extensively modified Evinrude that you described to fit into -A- class might have been in-work during that period when Hallum was doing the full mod’s on the 3-cyl OMC Loop motor that Bob Rhodes ran with some success over time. I sure do not know the history of that effort but I think I saw it run one time at Lake Lawrence early in its development. Might have been about 1979 or then a decade later.
    Carry on,
    RR

  6. #96
    Team Member smittythewelder's Avatar
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    Sounds like roughly the right time period, Russ. If so, by that point Class B had become 350cc, which would include 22" engines. But maybe this project was no more than a playmotor. All I saw was powerhead parts in a box, set aside.

    Hey Russ, I have a thread going up in the Technical section, entitled "Mild hop-up of a Merc 350?" Take a look at the photos and link to photos that were just contributed. Other guys than Hallum have been radically modifying some "unlikely" engines, very nice work.

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