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Old 12-01-2010, 10:18 PM   #60 (permalink)
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Originally Posted by dcb View Post
I would love to but every dang efficient engine discussion gets Mechs whirlygig brought into it.

I would like to know, based on one of the main positive aspects of the wheeliebob design, what the losses are for reciprocating pistons, say at 2000 rpm for a 1.5 liter 4cyl car. Any guesses?
Do a coast down test of a vehicle.

In high gear with standard engine. Highest loss
In neutral. No loss related to engine
Pull the plugs to eliminate the compression.
Pull the head to eliminate valve train losses.

You would have to push the car to speed in tha last two tests.
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