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yes ''free'', no free XD ... 30% of the heat of the engines goes to the radiator, and other 30% skips from the exhaust... with the a/c, alternator, water pump, you just keep with a max of 22% of the engine heat power, of those 22% 15 is consumed by the gearbox, 4% the rest of trans and something of 10-15% from wheels, then you have something of 17% of the engine converted to movement and at 60mph you just have 4% more in your nice box of 60 hp XD...
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