Quote:
Originally Posted by divedaddy03
Love the ideas, keep them coming guys.
What about a small diesel engine that will run on Vegetable oil?
Wayne
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That's a cool idea too, although the reason I mention the CBR motor is because it probably weighs next to nothing, and has very good power to weight ratio. The compression ratio is high and the rod stroke ratio is high so that offsets the "inherent" inefficiency of running at higher speed, I don't know what the cam specs are but I imagine regrinding the exhaust cam for say 5krpm rather than 10k, and then retarding the intake cam position to reduce volumetric efficiency should give a small bump in efficiency. Since it's a bike motor it probably has stupid long duration, so this might allow stoichiometric air fuel ratios at full throttle. At 5000rpm you could probably make 15hp? which is probably adequate for high speed highway cruising. If not, a turbocharger might be appropriate, with "miller cycle" operation.
The only thing is, if you use say E85 for renewableness, the port injection kinda wastes some of the charge cooling. Perhaps moving the injector upstream would be good, if more of the alcohol is vaporized before it hits the valves then less heat will be transferred to them. Also the compression ratio would need another bump to utilize the alcohol effectively, which is hard to do with the short stroke messing up in cylinder flow and combustion chamber geometry. I guess that's another argument for a turbo?