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Old 01-16-2018, 04:01 PM
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Default Coolest engine EVER

Alright so not as cool has a Honda NR500 engine but still a steal and a half. Managed to get it down to $300 because of travel. It's far from new despite what the ad says but a 550cc 4cyl? Now the big question is what upcoming project is this gonna go in? F4 mini chopper? Supreme Spiderbox? Possible drag rail?
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Old 01-16-2018, 04:07 PM
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32 cubic inch is approximately 524cc.

Looks neat for something, definitely interesting being a 4 cylinder.

Some more info I found.
http://saturnsurplus.com/engine/engine.htm

Here's a whole generator with a similar motor (same military spec, possibly different manufacturer)
https://www.ebay.com/itm/3KW-28-V-DC...92566#viTabs_0

Lots of parts available on Ebay

Only rated 6HP?
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Old 01-16-2018, 04:22 PM
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I'd imagine it's more than that. Considering at that time you needed at least 8hp to run a 2500w gen. I have a '85 Onan 3500w that's an opposed 2cyl that's rated at 16hp. Either way I just like it for the atheistic properties. Maybe build a Mini MB and use this for the power plant using a CSC rear diff for the driveline.
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Old 01-16-2018, 08:48 PM
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These engines produce significantly more power than their rating.

These old Teledyne motors are really cool. The parts are all interchangeable between engines. The 1,2, and 4 cylinder all use the same jugs, heads, valves, Pistons, con rods, etc. They are conservatively rated for military applications, designed to run endlessly for months. If you want longevity, you use a massively oversized engine and run it at a fraction of its potential tial capacity. That rating is likely rated at 1800 rpm for running a 4 pole generator. All the ignition cables and spark plugs are shielded to prevent comms and radar interference on these engines too. They were manufactured by several companies, but to identical specs. Parts *should* be interchangeable across the board.

There's a video series on YouTube of a guy who build a 4x4 articulated Cub cadet garden tractors and slapped one of these motors in it. Might be worth a look. I think he calls it cubzilla

At 300 bucks you practically stole that engine.

Another note... You might need to check the engine rotation, as I believe these were all counterclockwise at the flywheel/fan end, since that's where the PTO is intended to be. The opposite of industrial engines. I could be mistaken, but that's sticking in my head for some reason. Or maybe they are clockwise at the flywheel end, so the bolt-on PTO stub shaft that attaches to it is backwards from the pto shaft on an industrial. I can't remember. But I know you can't drop it in to replace an industrial engine as-is.
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Old 01-16-2018, 08:54 PM
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6:1 compression.. it likely runs on "whatever you fuel it up with" and that's why the rating is that low.

some slight mods and one or two more sophisticated mods, and it'd be in the mid twenty horses I assume, with a bit finesse maybe thirty even??

Anyways.. IMHO that thing would belong to some military style vehicle.. a Mule perhaps
and that coming from the guy who doesn't like military themed vehicles too much,
but you couldn't ever make a better match ...
ORRR.. I know... a half scale military jeep..willies style

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Old 01-16-2018, 08:58 PM
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Never seen one before. But my first impression would be something aircraft like. If you could strip the accessories off, and give it bare look, it might resemble a Lycoming or Contenental engine.
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Old 01-16-2018, 09:02 PM
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Quote:
Originally Posted by itsid View Post
6:1 compression.. it likely runs on "whatever you fuel it up with" and that's why the rating is that low.

some slight mods and one or two more sophisticated mods, and it'd be in the mid twenty horses I assume, with a bit finesse maybe thirty even??

Anyways.. IMHO that thing would belong to some military style vehicle.. a Mule perhaps
and that coming from the guy who doesn't like military themed vehicles too much,
but you couldn't ever make a better match ...
ORRR.. I know... a half scale military jeep..willies style

'sid
Yes when these were built, the most common fuel found on military field bases would have been 80 octane leaded. Old school aviation fuel. Hence the low compression.
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Old 01-16-2018, 11:21 PM
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Score!
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Old 01-16-2018, 11:28 PM
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Luckily it spins clockwise. I ran it for about 2min on 93 and it REALLY didn't like it. The guy I got it from said it do with the atomization in the carb that screws with things. But I had a couple Lincoln Electric Gen/Welders that came from Maine Casade when they closed down and this is the exact engine that powered them. They made 14.7 hp according to a repair shop vs the opposed twin Briggs that was in my MTD 990 that made 16hp @ 7.5. The guy has something to do with a military surplus store and he had probably 20 or so of these and TOTES of parts. If I mess this one up it's a 2hr drive to more wasted $$$
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Old 01-19-2018, 03:52 AM
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That is a low rpm engine used for the 24vdc generators. It will also replace the engine in the USMC MULE with a few modifications for electric starter and adding a alternator. Do not try to spin that engine more than the governed speed it will spit the rods out. A friend of mine had a couple and tried to use them on homebuilt log splitters. Kicked the rods out when he tried to up the governed speed, both engines.


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Old 01-19-2018, 04:48 AM
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With such low compression, it could probably run off of Kerosene without issues. Never seen an engine like this before, didn't know such a thing even existed.

---------- Post added at 05:48 AM ---------- Previous post was at 05:47 AM ----------

It almost looks like a mini boxer engine if I'm being honest. I agree with Alex, a mini jeep with this engine would be cool.
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Old 01-19-2018, 07:12 AM
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Quote:
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With such low compression, it could probably run off of Kerosene without issues. Never seen an engine like this before, didn't know such a thing even existed.

---------- Post added at 05:48 AM ---------- Previous post was at 05:47 AM ----------

It almost looks like a mini boxer engine if I'm being honest. I agree with Alex, a mini jeep with this engine would be cool.
It is a mini boxer. Except it's not. The cylinders are opposed, but I believe it's a 180 vee configuration, where opposing Pistons move in unison, not opposite each other.
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Old 01-19-2018, 09:05 AM
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It is a mini boxer. Except it's not. The cylinders are opposed, but I believe it's a 180 vee configuration, where opposing Pistons move in unison, not opposite each other.
Huh? You lost me. How would opposing pistons move in unison. No.1 is at TDC, no.2 at bottom, 3 is bottom and 4 is at the top. How else would it go?
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Old 01-19-2018, 10:50 AM
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Huh? You lost me. How would opposing pistons move in unison. No.1 is at TDC, no.2 at bottom, 3 is bottom and 4 is at the top. How else would it go?
Viewed from the end of the crankshaft, looking at one pair of cylinders:
Top is a boxer.
Bottom is a 180 V.
It's animated if you enlarge it.

On a true boxer, each opposing pair of Pistons has separate journals spaced 180 apart, so both Pistons hit TDC simultaneously, on opposite strokes.

On a 180 V, opposing Pistons share a journal, so one hits TDC while the other is at dead bottom.
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Old 01-19-2018, 05:08 PM
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Thanks for the lesson.
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Old 01-19-2018, 07:47 PM
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I found a few near me, I might look into picking one up for a little experimental project. I'm thinking with a 6:1 compression ratio, it's asking for some boost. I like the idea of a scaled down Willy's, Sid.

Have some stuff I need to get rid of to make some space. Almost finished up the projects I have now, just waiting on parts for the 5 speed mini bike, and getting the engine back in the turbo civic on Sunday hopefully.
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Old 01-20-2018, 05:00 AM
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Quote:
Originally Posted by Bwdeaton View Post
I like the idea of a scaled down Willy's, Sid.
..
Right?
too bad Porsche930dude spoiled that for most of us...
his micro willy is that awesome,
that chances are you wouldn't even want to try yourself anymore after seeing it.
So if you haven't seen it yet.. don't go looking for it, it's intimidating

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Old 01-20-2018, 10:35 AM
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I was thinking 1:2 or 1:1.5 scale. The math is easy just a matter of getting everything to fit. If guy can do it with a '39 Chevy I think I could do it with a Willys MB. Lot less intricate curves, lot less planning, and a lot more cut, grind, weld, paint. But the best part is it'll be true 4x4. (And not ripped from ATV) Added weight but if I have something that'll haul it why not? He used an Onan camper generator engine. I'm using a legit Military Generator engine.
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