Hi from Neurotaffy, New father daughter(s) go-cart build

neurotaffy

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Hi everyone,
Im "neurotaffy" its a name that the computer algorythm in a Yahoo scooter group chose for me years ago and it just sort of fit and stuck with me. Im a mechanical guy, welder, artist with a shop with metal saws etc. and lathes to make stuff but to this day haven't made a go-cart from scratch. We have twin daughters- now turning 10 and I would like to fabricate some carts for them to race about our field. Nothing too fast but adequate for a 100 pound kid.

Materials: So far I have collected three running 11(?) HP Tecumseh Horizontal shaft snowblower engines (air filters attached eventually) and a Briggs and Stratton OHV taken from a Cub Cadet Snowblower. All run but need some carburetor cleaning. Other than that I have also been collecting gently used garden tractor mower tires and snow blower tires.

So far, I have browsed a few online sites that sell bits and pieces for carts. I will be likely making frames from tubing (square or round?-no tube bender as of yet) but really dont know where to begin. My logic indicates that I will need to plan around the engine HP with clutch, drive train, tire size, and brakes to stop. I could also consider a suspension but that might be a bit elaborate for what I'd like to achieve.

I think once I have a good handle on making a prototype and getting the bugs all out id like to make a few of these machines for the kid's friends and parents there of to run about the yard with. Sound good?

I am ready to hear any advice on getting started with designing frame, drive setup etc. My camera is always at the ready to document progress with pictures as in my other group experiences, the group wants to see in progress work.

Thanks, "Neuro"
 

panchothedog

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Welcome. If it's going to be for off road use ( race about our field ) you want to have a live rear axle and bigger wheels and tires. 6" rims in the front and 8" in the rear, or 8" all around. For clutch-drive train, you want to run a torque converter. Not a centrifugal clutch. They are almost indestructible and work good for off road use. As questioned in post # 2, the shafts need to be straight and not tapered. Diameter is important. 3/4" for a 30 series torque converter, 1" for a
40 series. Sounds like you are a pretty capable person and ready to get going.
 
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