Thread: V belts?

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    V belts?
    #1
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    You guys think a dual 5/8 v belt setup would drive a 20hp 500lb buggy? The engine I want to use necessetates a weird angle that wont work with a chain, some Im considering driving a jack shaft with the engine via the belts, then mounting either a torque converter or centrifugal clutch to the jack shaft to drive the axle.
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    Re: V belts?
    #2
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    A total guess here, but it seems small. I guess if both the pulleys were big enough it would spread the torque out? They would have to be pretty big though.
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    Re: V belts?
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    Might have thought up a different direction...has anyone run a chain sideways? I’ve never seen it done, but it lets me sort out part of my problem.
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    Re: V belts?
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    I've seen engines mounted sideways, with a chain to a differential. Is that what you mean?
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    Re: V belts?
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    Yeah sprockets parallel to the ground.
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    Re: V belts?
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    Oh! I meant an engine with a horizontal shaft. The chain was going left to right, to a small car diff.
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    Re: V belts?
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    A b size belt is good for roughly a 5 hp electric motor each, in a continuous application. 2 would work for 10 hp, and so on. More on this down below, as it is different for gas engines.

    I had 2 b size belts on a 12hp go cart back in the day (like 20 years ago), worked fine, even when using them as a clutch, but they didn't last forever, got a few weeks out of each set.

    Of course, using them as just a link between a jack shaft will yield better results.

    A gas engine usually produces torque in a different way than an electric motor, even though hp may be the same. An industrial gas engine will usually peak around 3600rpm, while most modern electric motors are rated for 1750rpm, so the torque produced by the gas engine is about half of that for the electric motor, even though hp is the same, therefore the same belt can be used on a higher rated has engine.

    Bigger pullies will also gain traction on the belt, and allow more power to be passed, but the belt will make more revolutions as a trade off.
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