
Originally Posted by
Skunk
I have been developing ideas for a water dyno but only for tuning (rather than Skunkaboom figures)...
But if we find us the steel and I'll be into trying this!
I did note the warnings about spinning large steel flywheels... and the engines are only kart motors (he shows one developing 13hp).
Use a large truck engine. Custom shaft running in ball bearings clamped in the last two main bearings in the block. Bolt the truck flywheel to a flange on the shaft. Use the standard truck clutch, bell housing and gearbox primary shaft. It's pretty much all done for you.
You do need to count rev's pretty accurately though, if you expect the sort of resolution likely to "see" the typically small improvements from minor tuning changes. Counting is easy, just a proximity or magnetic switch stolen from an automotive rev counter. Plotting the trend accurately is the tricky bit. That and the sprag clutch.
Go soothingly on the grease mud, as there lurks the skid demon
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