I decided to put my 1963 D100 with a stock slant six on the dyno. I thought y'all might enjoy the sound of it pounding out 55 furious ponies.
https://youtu.be/tISyUK7scpM

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1963 D100: 3-on-the-tree, 3.50 rear, mostly original, stainless bore clutch slave & brake master, rebuilt speedo, original rebuilt carb.

1961 D200: crew cab short bed, sold.

1965 D500 Crew Cab, planning a 6V92 swap and 6x6 conversion.

55 hp? That is pretty anemic. Is it a high mile motor?

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Casually looking for a Clifford hyperpak intake for cheap.

Looks like it's running rich.

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Ed
64 Valiant 225 / 904 / 42:1 manual steering / 9" drum brakes

55 horses might not sound like a lot, but I sure wouldn't want to clean up after them!

Fifty-five horses are bound to kick something!

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If it was easy, everybody would be doing it.

Farmtruck states has a flat cam lobe.

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Charrlie_S
65 Valiant 100 2dr post 170 turbo
66 Valiant Signet 170 nitrous
64 Valiant Signet
64 Valiant 4dr 170
64 Valiant 4dr 225

The smoke ring after the first run-up was amazing! Never seen anything like it.

I noticed the video is 2:25 long.

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Somehow I ended up owning three 1964 slant six A-bodies. I race one of them.
Escape Velocity Racing

It's all original, sucking air through the oil-bath filter and untouched carb. And has one intake lobe worn to a circle. Given the condition, I wasn't expecting much more. What's hilarious is how little hp it made at higher RPM, it was down to about 32hp by 4000RPM. It made that 55hp at a mere 2700RPM, peak torque was 117@1600.

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1963 D100: 3-on-the-tree, 3.50 rear, mostly original, stainless bore clutch slave & brake master, rebuilt speedo, original rebuilt carb.

1961 D200: crew cab short bed, sold.

1965 D500 Crew Cab, planning a 6V92 swap and 6x6 conversion.

HAHA! I didn't notice that till you mentioned it. What a happy accident.

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1963 D100: 3-on-the-tree, 3.50 rear, mostly original, stainless bore clutch slave & brake master, rebuilt speedo, original rebuilt carb.

1961 D200: crew cab short bed, sold.

1965 D500 Crew Cab, planning a 6V92 swap and 6x6 conversion.

Well, that explains it. At least you can say you can easily double the output of your engine and have it still be naturally aspirated.

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Casually looking for a Clifford hyperpak intake for cheap.

My '61 D100 appears to be original too, except the intake and exhaust manifolds are from the '70s. At least your truck moves on its own power! I'm getting there - slowly. I expect everything will be slow with this truck.

Having owned a 1973 D100 with a dead cylinder (burned exhaust valve) I can relate to the dismal power output. 55-60 MPH is not a great top speed. I should dyno my '54 Dodge pickup and see how close it gets to the 123 gross hp printed on the tag.

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Joshua

Josh, you could do that, but keep in mind what was posted is on a chassis dyno, not an engine dyno.
I suggest still not too bad for a half-worn-out, 60's farm truck.

Roger

Roger,

I'm aware.

My 1954 C1 truck's ID tag states 145 certified gross hp and 123 certified net hp. I'm curious to know how much of that net hp makes it to the rear wheels. A highly reliable source states that 88% minus about 10hp should make it to the rear wheels. People claiming 30% drivetrain loss practice a foolish numbers game and will grossly over state the horsepower consumed by the engine accessories to support big engine horsepower numbers. The history of Dynojet's correction factor is telling.

Part of my interest in this is that the numbers for my 241 ci V8 are pretty close to the numbers given for an early 225 as was discussed in the cooling fan thread. http://slantsix.org/forum/viewtopic.php ... al#p457499

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Joshua