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Old 04-23-2003, 07:05 AM   #16
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So in other words a rolling-road scaled down by a factor of 10.

I'd love to see the shaker rig though!!!
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Old 04-23-2003, 08:16 AM   #17
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The Thor chassis dyno that Parma/PSE sold for a while was used heavily by oval racers.

This was effectively a Bud's dyno. There was a solid axle with a spur turning a motor. Relative RPM numbers were generated by putting a DVM on the slave motor. Amp draw was measured using another DVM on the voltage supply wire to the tested vehicle. Loads were adjusted by a switch with resistors across the slave motor.

The results from this dyno were pretty good, but there were consistency problems. They were not too big, and they sold for somewhere between $250 and $300.

This worked for a rear-wheel drive car, but to test a TC, that would be another story.

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Old 04-23-2003, 08:30 AM   #18
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i seen a dyno on ebay once. it had adjustable rollers for different wheel base cars. you could add a load to the rollers and get all the numbers too (torq, HP, MPH, etc.). it looked cool and even had a blower for nitro cars to act like they were moving.
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Old 04-23-2003, 07:55 PM   #19
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Old 04-24-2003, 08:30 AM   #20
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Somebody had a nitro dyno at the Chicago Hobby Show a couple of years back but I don't remember who it was.

One drawback with the PSE dyno was the amount of force you put on the back of the car. If you pushed down to hard I thought the numbers would be different than just holding it down enough to keep it steady on the platform. But, I could be completely wrong because I did not use one but that is the perception from just looking at it.

I am no engine expert but I would look at how the full size dyno's work and try to duplicate it as much as possible.
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