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A Hit And Miss Engine Throws A Belt


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  #1  
Old 06-12-2018, 06:18:57 PM
David Cave David Cave is offline
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Default A Hit And Miss Engine Throws A Belt

I was running an engine on my dyno with a flat belt not tight enough. When a flat belt slips it's almost impossible to keep it on the pulley. You can actually see the belt running curved as slippage tries to run it off and the crown effect tries to keep it on.
https://www.youtube.com/watch?v=GBBzrP7MRc8
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Old 06-13-2018, 03:32:16 PM
Andrew Mackey Andrew Mackey is offline
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Exclamation Re: A Hit And Miss Engine Throws A Belt

A common problem, especially if under a heavy load - tight or not. Often a set of guide stakes are put into the ground, near the engine, so as to keep the belt in line. Another method is to cross the belt. not sure if you can run your device backwards though.
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Old 06-13-2018, 07:44:51 PM
David Cave David Cave is offline
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Default Re: A Hit And Miss Engine Throws A Belt

Thanks Andrew. Yes if I was outside I would stake it. It's summer in Phoenix so I'm inside. I have an earlier video building the dyno followed by one running and calibrating the dyno. That second video shows the two bars I use to keep things from moving around. In this case I just forgot to tighten the belt after I made some changes. I thought it was interesting that you can actually see the belt curve so I put it up as a video. The dyno will run backwards but I would have to do a little rewiring.
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Old 06-13-2018, 08:35:01 PM
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Mike in NC Mike in NC is offline
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Default Re: A Hit And Miss Engine Throws A Belt

Put a half-twist in the belt. Meaning one end the belt is right side out and at the other end it would be inside out. It would still be running in the same direction as in your video.
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