How to build a "Green" electric car.

MHz

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Mar 16, 2007
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Red Deer AB
I thought NG had more calories per lb? Does that $6K include maximizing the internals of the engine itself as well as the plumbing up top?
 

MHz

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Mar 16, 2007
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Red Deer AB
Mileage is the same. It's cost that is different. CNG is 47.9 per litre (70 cents per Kg) equivalent in SK
So all things considered if I am currently getting 20mpg at a fixed cost with gas that is 3x the price switching over would be the same as getting a vehicle that is getting 60mpg and my yearly expenses go down by 2/3? From that I would be able to determine the breakeven point and predict how much I would eventually save over the years. (assuming a set inflation standard)

Internals stay the same but the ECU is replaced to advance the ignition.
With propane you should be jacking the compression up to about 10.5 to 1 if you want the best performance and the cleanest burning engine. Modern fuel injection would need to be running on aviation fuel to run at that ratio. If that is the case a dual fuel (at the same time) engine could be hatched, high compression with regular gas and NG injection that is activated by the knock sensor. You might not get right to 10.5 but even 10 would be a gig improvement over the current 8.5.
 

petros

The Central Scrutinizer
Nov 21, 2008
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You still get 20mpg but the cost is 2/3 less. Todays' vehicle are already high compression EFI or not. Knock is compensated by the ECU advancing the ignition timing.
 

MHz

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Mar 16, 2007
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Red Deer AB
I didn't realize that, I thought it was just for ignition advancement and high compression still needed premium fiel in addition to the improvement is ignition timing
 

MHz

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Mar 16, 2007
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Red Deer AB
Not sure how reliable this info is but if it is then any switch over should include this change or at least a blower to bring the 8.5 up to this standard (after upgrading to top fuel parts for reliability and that ain't cheap)

"For a dedicated-CNG, the ideal setup is often quoted around 14:1 and 15:1."
 

MHz

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Mar 16, 2007
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Red Deer AB
I wouldn't, keep the body and convert a 2.8 v6 to be the power-plant. Too bad it wouldn't take the higher compressions without putting the crank on the road, still even on gas it would be a huge improvement on fuel mileage in the city and still use OD on the highway.

Sell the engine as it is a Canadian block variety and it might have some value to a restorer. So far, not too impressed with whoever rebuilt it.
 

MHz

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Mar 16, 2007
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Red Deer AB
I'd settle for a 4-cyl flathead if it was a Chevy II, You need a supercharger to overcome the airflow problems but that is not a problem these days.

Then again if it was just for town I might put in a 600cc 4-stroke bike engine (single cylinder preferred) with a 5 speed in the car and a 5 speed on the engine that would be a 25 speed car lol.

I wonder if somebody is going to come up with an electric engine for cars that is equal to the same design used on the better e-bikes. A 4 speed would be increasing the voltage on the fly 12-24-48-96

 
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