Stupid simple engine/frame options

[aczlan]

I‘m not a hydraulics expert but from rough calculations you need a substantial sized engine to run a large enough pump to get a reasonable speed. Think hi flow skid steer. The thing doesn’t have to be a rocket but it you need to drive 1/2 mile to the neighbor’s place to pick something up or give them a hand I’d like it to be able to do 15mph or better, 25 mph on a smooth road would be ideal.

If you want suspension and 4wd it’s even less beneficial, I don’t want to mess with chains. I have considered articulated hydraulic steering, but that would require my 2 engine idea to run both of them all the time. I like the thought of one if you’re just driving around/hauling a load, and crank the other one up when you need to do actual work.

I don’t believe that’s going to happen with a 22 hp Predator engine, it’s the gearing that makes it possible.

Using a ExMark Navigator ( Navigator Commercial 42-inch and 48-inch Zero-Turn Mowers ) for an example (because they are pretty good at listing specs), they have a pair of 17.84cu/in/rev wheel motors and have a top speed of 7MPH.
With the stock 18 x 10.5-10 Multi-Trac® C/S tires having a diameter of 17.9" (per: Multi-Trac C/S Tire ) that works out to about 131RPM.
To get 131RPM from a 17.84cu/in/rev wheel motor requires about 10GPM per motor and the drive system reportedly maxes out around 2500PSI.
Assuming that they use 1500PSI running flat out on level(ish) ground, 20GPM at 1500PSI requires about 20HP (per the calculator at: Surplus Center )

If you are running this through a set of reduction axles (vs direct driving the wheels), you will want more speed and can get away with less torque.

Aaron Z

 

[TimJus]

those turd 1710-19... portals are bevel gear drives. they are weak.
i have 1710 currently in the shop it stripped drive shaft spline from centre shaft.

 

[Gatorgrizz27]

those turd 1710-19... portals are bevel gear drives. they are weak.
i have 1710 currently in the shop it stripped drive shaft spline from centre shaft.

That may be true, but I doubt whatever they go in will be running the bucket into a pile of gravel on concrete at max RPM…

 

[SHARPMACHINE]

Thinking maybe transaxle is the way to go. Just need a stupid simple one to buy, modify and install? lol

Appreciate all of the responses.

 

[JR4X]

Thinking maybe transaxle is the way to go. Just need a stupid simple one to buy, modify and install? lol

Appreciate all of the responses.

Whatever cheap front wheel drive car seems plentiful where you are. If there is such a thing.

 

[SHARPMACHINE]

Whatever cheap front wheel drive car seems plentiful where you are. If there is such a thing.

Most older stuff is available here. Everything rusts out after about 10 or 15 years. My concern is finding something I can modify the harness on. Curious what would be easiest.

As one member mentioned, I should just buy a small suv and remove most of the body. Turn it into a cowl beater..

 

[posford]

I have a fabricated frame that I want/should do something with, a pair or NT Jeep axles (D30 and AMC 20?) and all sorts of random other shit that I keep thinking would be a fun project to get the boy interested in (he's 8 and loves watching Motortrend) I've considered snowmobile engines (have a rotax 377 under the bench), Honda/predator engines (Honda 9hp on an old lawnmower that runs nice), or find a rotted Geo Metro to steal the 3cyl/transaxle out of. Local guy has a Model A doodlebug project hes tried to get rid of, thought about using that as the basis of a firewall buggy. Run some 15" UTV tires or something.

 

[JR4X]

If you wanted to build your own doodle bug it doesn’t get any easier than this thing right here.

https://m.facebook.com/marketplace/item/268358642354123/

Edit. For pics. Running samurai engine

or the easiest thing in the world to swap another power plant into while keeping it 4wd.

 

[2big bronco]

If you wanted to build your own doodle bug it doesn’t get any easier than this thing right here.

https://m.facebook.com/marketplace/item/268358642354123/

The tcase is worth 250 as a core.
Anyone want to grab the whole thing for me?

 

[JR4X]

The tcase is worth 250 as a core.
Anyone want to grab the whole thing for me?

If I was close enough to get it, I wouldn’t have shared it. And I need another Sami t-case.

 

[SHARPMACHINE]

Agreed, that would be the way to do it. I have been looking for a long time, samurai stuff is kinda hard to find in the rust belt.

 

[VintageSmoke]

Not exactly what you are looking to do, but similar..
I am currently undecided if I want to use the ATV motor, trans, CVT drive or sell it and use a 992cc Generac V-Twin motor I have with a CVT and Amazon F/R trans.

3/4 scale Mini Crawler

Starting a build thread on a project i'm starting. I was planning on building a "kids buggy" for my son, but I wanna drive it too and he grows so fast that he'll probably outgrow it by time I finish it. Tube frame, 90-95" wheelbase, lightweight 35" sticky SXS tires, 400cc Polaris ATV...

irate4x4.com

 

[SHARPMACHINE]

^^^^^ Nice project. One upside to what you mention is no wire harness mods needed. I am mentally crippled when I think about that part. LS conversions are not bad, but that is because there is so much supporting information everywhere online.