OT: Gas mileage vs. emissions, tree hugger alert |
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OT: Gas mileage vs. emissions, tree hugger alert |
yeahmag |
Nov 17 2008, 12:24 PM
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#1
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Advanced Member Group: Members Posts: 2,422 Joined: 18-April 05 From: Pasadena, CA Member No.: 3,946 Region Association: Southern California |
OK. I admit it... I dig green technology. Well I dig all technology, but I digress...
I'm curious how emissions vs. gas mileage balance out. For example: My '88 FJ62 gets about 12 MPG on a good day, but has F.I., Catalytic Converters, and all that good stuff. My 914 gets over 2X that, but has no emissions equipment at all. I'm curious at where the tipping point is: 2 stroke scooter vs. compact car 4 stroke scooter vs. compact car etc... I'm even considering trying to build a junkyard/STF electric motorcycle. I'm poor, but have plenty of time and creativity! Comments? -Aaron |
Brett W |
Nov 18 2008, 09:25 AM
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#2
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Advanced Member Group: Members Posts: 2,856 Joined: 17-September 03 From: huntsville, al Member No.: 1,169 Region Association: None |
Get a Honda. They are cheap enough that you can't go wrong with the green and efficient. I was getting 31in town and 37 on the highway with my turbo car and it got 37in town and 42-45 on the highway without the turbo. I bet I can get the on highway mileage back up to 40 with the turbo.
The 914 engine is very thermodynamically inefficient as well as having very poor combustion dynamics. Part of that comes from the low compression ratio, part of it is the aircooled problem, and the other part is the basic engine architecture. While good for performance short stroke big bore motors suck as far as energy and emissions efficiency goes. The camshaft design is also far from one needed for good emissions. |
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