Cub small engine swap.

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Spencerpearson31
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Cub small engine swap.

Postby Spencerpearson31 » Fri May 29, 2020 2:45 pm

So I know that there is a small move to do the Cubota engine swap. But I have a question on something similar. If my engine were to go bad for what ever the reason. And I made engine frame brace. As well as put something like a 14hp engine on a plate with jack shafts to the trans and all the sheet metal back on. Do you think it would get good or bad looks from others in the show if I took it. The only reason I ask this is simply cause even though I would love to keep a cub looking as it did from factory. I use mine in the garden and other things. And want to take to shoes like normal. But if I had a engine problem and could not locate a fix. Would it then be inappropriate to do that swap and still take to shows. Or would you think it would be most likely welcomed for the creative nature. Just thoughts as that’s what I would think if I saw one.

Waif
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Re: Cub small engine swap.

Postby Waif » Fri May 29, 2020 3:05 pm

Guessing it would matter if a particular show was juried for stock configurations only. Or if modified , (and how modified) were allowed.

Eugene
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Re: Cub small engine swap.

Postby Eugene » Fri May 29, 2020 3:42 pm

Most small lawn mower type engines operate at 3600 RPM with their maximum torque some where around 2200 - 2400 RPMs.

If you think it's a good idea, go for it.

If I saw it at a tractor show I would scratch my head and wonder why. Then have a really great conversation with the tractor owner.
I have an excuse. CRS.

inairam
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1949 with kub klipper belly mower. mag 6v - Mom
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1953 54 blade, c22, wood 42 6v
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1965 lo-boy with c-3 mower 12 v - Loboy
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Re: Cub small engine swap.

Postby inairam » Fri May 29, 2020 5:54 pm

You are not going the have the correct torque or RPM to make it practical. It will move but I do not think it will be useful. Horsepower is a made up term by James Watt to make a quick way to compare different engines. You have to look at the components of HP - torque, and RPM when picking an engine for an application. A Ferrari engine and a boat engine may both produce 500 HP but you probably will not be happy if to switch them. That is because the torque curve and operating RPM are very different.

To go to your original question - if your engine dies there are enough cubs, power units, and parts tractors out there to get a C60 engine.
When you only have 9 horsepower you need to know the names of all of the ponies!

Spencerpearson31
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Joined: Thu May 21, 2020 2:20 pm
Zip Code: 39111
Tractors Owned: 1948 Farmall cub
W McCormick Deere
1926 vb model John Deere cultivator
Location: 39111

Re: Cub small engine swap.

Postby Spencerpearson31 » Fri May 29, 2020 6:03 pm

Ok get thank you all for the input. I would still want to keep this one original. And fix the motor. I just was thinking about it while in a break from splitting the tractor to fix a bent transmission shaft and throw out bearing

Ike
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Re: Cub small engine swap.

Postby Ike » Fri May 29, 2020 10:35 pm

The idea has been done on a bigger tractor than a Cub. I remembered this video I saw years ago.

Spencerpearson31
Posts: 23
Joined: Thu May 21, 2020 2:20 pm
Zip Code: 39111
Tractors Owned: 1948 Farmall cub
W McCormick Deere
1926 vb model John Deere cultivator
Location: 39111

Re: Cub small engine swap.

Postby Spencerpearson31 » Fri May 29, 2020 10:52 pm

Yeah that’s where I first thought about it . A while back as well. I think that is why I had thought it may work for the cub.

inairam
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Joined: Wed Jul 08, 2015 10:24 am
Zip Code: 19342
Tractors Owned: 1948 6v - Dozer
1949 with kub klipper belly mower. mag 6v - Mom
1950 with plow, 54 blade, mott mag 6v - Roxanne
1953 54 blade, c22, wood 42 6v
1957 with c-2 mower & c-54 grader blade 6v - barn Queen
1965 lo-boy with c-3 mower 12 v - Loboy
1974 Horse II 12 v
1975 with homemade mower 12 v - Horse
1979 long strip 12 v stuck engine
130 with international 1000 loader 6 v
1969 140 with bush hog tow behind mower 6 v
Memberships: Rough and Tumble Engineers Historical Association;Chapter 8 IH Collectors; IH Collectors Worldwide
Circle of Safety: Y
Location: Glen Mills PA

Re: Cub small engine swap.

Postby inairam » Sat May 30, 2020 5:58 am

They are moving the Massey around but they are not putting a big load on it. I guess the bailer put the biggest load.

They have a good reduction between the sprockets (at 2.27 min) about 3-4 to 1 reduction so they are going into the trans at 900-1200 RPM.

I am sure the performance of the tractor is very different than the original but they are moving it around and getting some work out of it. I do not think they made 250000 Massey Harris 33s. They had a lot fewer options to re-engine or get parts so this project worth the effort.

There are a lot of c60s around.
When you only have 9 horsepower you need to know the names of all of the ponies!

Gary Dotson
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Re: Cub small engine swap.

Postby Gary Dotson » Sat May 30, 2020 7:03 am

I see a lot of creative stuff at shows and it's all fun to look at. Some of it makes no sense at all, but it's still neat to look at. Someone once asked George Willer why he did a certain thing and his answer was "because I could". He made quite a few useless creations and, yes, they were fun to look at. If everyone brought the same items to the shows, it would soon get boring. Go ahead, build something crazy and take it to shows and show it to the world.

Spencerpearson31
Posts: 23
Joined: Thu May 21, 2020 2:20 pm
Zip Code: 39111
Tractors Owned: 1948 Farmall cub
W McCormick Deere
1926 vb model John Deere cultivator
Location: 39111

Re: Cub small engine swap.

Postby Spencerpearson31 » Sat May 30, 2020 9:00 am

I thought it would be nice to see creative stuff. Like I say I have a cub and going through it front to back and it runs good. But for those few that make it to the scrape yard. That’s what I was thinking. The hole why would you scrape it thought. Why not fix it or if you can’t fix the original power plant. Then why not do what that guy did. If it runs the cultivator and pulls a disc then it’s a positive out come. May be slow but beats doing it by hand lol

SONNY
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Re: Cub small engine swap.

Postby SONNY » Sat May 30, 2020 1:04 pm

Saw a 185 lo-boy with a Ford 302 stuffed in it and didnt notice it til some guy started laughing at it ---THEN I saw what was up! The guy did a pro-job and got the hood back on, front end all on and painted just like regular lo-boy with yellow engine.
IF you have the money and some time to waste ---anything is possible. Also you need access to expensive machines to make parts to connect the stuff together!

Spencerpearson31
Posts: 23
Joined: Thu May 21, 2020 2:20 pm
Zip Code: 39111
Tractors Owned: 1948 Farmall cub
W McCormick Deere
1926 vb model John Deere cultivator
Location: 39111

Re: Cub small engine swap.

Postby Spencerpearson31 » Sun May 31, 2020 2:34 pm

Yeah I could see that having some money in it. I love seeing things like though. It gets my gears to turning . Trying to figure out how that was done . And the question that follow.

BigBill
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Re: Cub small engine swap.

Postby BigBill » Sun Jun 07, 2020 12:05 am

I been debating this engine swap in my loader project. Maybe a diesel.

I once brought a restored ‘72 suzuki TS250 to a bike show once. The guy who laughed didn’t even have a bike, these were early dual sport trail bikes that everyone had one. I don’t like people who laugh at my mule, it hurts his feelings, lol
I'm technically misunderstood at times i guess its been this way my whole life so why should it change now.

47fivewindow
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Re: Cub small engine swap.

Postby 47fivewindow » Sun Jun 07, 2020 11:43 am

At shows I am always interested in the ways folks have used offbeat fixes. You can only look at so many perfectly restored H tractors. Concerning the RPM difference, if a belt drive is used a two to one pulley ratio would put you in the correct range.

BigBill
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Re: Cub small engine swap.

Postby BigBill » Tue Jun 09, 2020 5:56 am

Ike wrote:The idea has been done on a bigger tractor than a Cub. I remembered this video I saw years ago.


This is cool but an old Buick straight eight engine with a peerless governor would be neat.
I'm technically misunderstood at times i guess its been this way my whole life so why should it change now.


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