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Old 11-02-2015, 06:32 PM   #44 (permalink)
fearlessjoe
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Quote:
Originally Posted by niky View Post
Well... if you build a bike around a complete flat four diesel, you will never want for power.

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I don't recall any... *good*... automotive diesels in the sub-liter range... Piaggio has a 400cc, but that's torpid... makes about as much power as a 125cc gas motor. Tata has a 700cc making... wow... 16 hp. That'll probably get you to 140 km/h with a good tailwind.

Even if you do cut down a decent automotive diesel, I don't expect the turbocharger system would work properly with the lower displacement. I think your aim should be to keep the whole thing... Hyundai has a 1.1 with about 75 hp, which should be enough for a motorcycle to do what you want it to do. And it should be small enough to fit a motorbike frame, as well.
the vital line you missed was "put a turbo on thats half the capacity..... " im pretty convinced that would be ok phisically.... its the electrics.....

but regarless..... if the 1.6 has 75bhp (which is what the peugeuot has).... it would be wishfull thinking to believe you would get half that from half the engine.....

i think 30bhp is believeble if everything went better then expected... which is enough i think

but i wouldnt want to go much lower

as for trikes.... a reverse trike would allow for a more reclined driving persition and better airo i think.... but you get no mpg in traffic jams and my time is important to me so.... i dunno.... for a pure exercise in a vehicle that gets amazing mileage at real speed it would be better but to use..... in london..... bikes rule
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