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Old 03-23-2011, 09:22 AM
 
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Oh how I want a gas saver from the 80s or early 90s
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Old 03-23-2011, 09:45 AM
 
Location: Lafayette, Louisiana
14,095 posts, read 22,993,970 times
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Quote:
Originally Posted by The Continental View Post
Oh how I want a gas saver from the 80s or early 90s
Part of the reason for their savings is weight reduction. Those vehicles would not meet today's crash safety requirements which add to the vehicle's weight. I'd like to see a car like the Prius or Insight with all their batteries and electric motor removed and replaced with a small turbo diesel engine to see which gets the better mpg in real world driving and by how much.
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Old 03-23-2011, 07:00 PM
 
Location: Columbia, California
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Originally Posted by kentuckydad95 View Post
,,,I know we have come a long way (sort of) in terms of MPG's of int. combustion engines vs 50 years ago, but can we do more or are we destined for electrics and hybrids only?
I believe our future lies in less dependence on fossil fuels.
Alcohol and Hydrogen fuel cells are the future .
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Old 03-23-2011, 08:56 PM
 
4,248 posts, read 10,243,319 times
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Originally Posted by sailordave View Post
Part of the reason for their savings is weight reduction. Those vehicles would not meet today's crash safety requirements which add to the vehicle's weight. I'd like to see a car like the Prius or Insight with all their batteries and electric motor removed and replaced with a small turbo diesel engine to see which gets the better mpg in real world driving and by how much.
So do the swap.
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Old 03-23-2011, 09:52 PM
 
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can we get a V8 to make 100mpg? the startling answer is yes we can. but understand it will not be easy, and we are going to have to vastly improve the thermal efficiency of the internal combustion engine greatly. right now we only use about 25% of the heat created by an IC engine to make power, the rest goes out through the oil, cooling system, and the exhaust. IF we can get an IC engine to operate at much higher temperatures, then we can lean out the overall fuel mixture, we only need a rich enough mixture to light the fire in the chamber, and we can drastically improve fuel economy. stratified charge engines do this. remember the honda civic cvcc? it used a prechamber with a rich mixture, about 12:1, to light the cylinder off, and the mixture in the main chamber was more like 19:1 a/f.

the other thing is that the engine has to be finely tuned and maintained that way in order to maintain that level of fuel efficiency. we are also going to have to use new materials that can handle controlled detonation, a must if we are going to get any IC engine to get 100mpg, and still be light enough to rev easily. we are also going to need lubricating oils that will operate efficiently at temperatures of around 500 degrees.

so can it be done? yes it can. is it practical? not yet, but perhaps one day.......
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Old 03-24-2011, 03:53 PM
 
Location: We_tside PNW (Columbia Gorge) / CO / SA TX / Thailand
20,842 posts, read 37,540,192 times
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Quote:
Originally Posted by ferretkona View Post
I believe our future lies in less dependence on fossil fuels.
Alcohol and Hydrogen fuel cells are the future .
or something a bit simpler, Algae (No vehicle or fueling station modifications required)

Quote:
are we destined for electrics and hybrids only?
IMHO, hybrid / electric technology should be commercialized FIRST in fleets (Taxi, trucks...i.e. 24x7 utilization). THEN the technology will be proven and more affordable.

Quote:
Oh how I want a gas saver from the 80s or early 90s
Check your neighbor's brier patch for a $35-$50 StealthRabbit, 50 mpg since 1976...No OPEC or Dinosaurs required
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