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I was pointed to the thread by Allch Chcar. Interesting find.
Here is my 2 cents on NG for sports(y) cars.
First, there are two alternatives, CNG and LPG (liquid propane gas, by-product of oil drilling)
LPG in liquid form stores at 8 times fewer pressure than CNG, but requires very clean air filters to form proper gas-oxygen mixture. Its also can destroy your air intake (LPG backfire in the intake, when not properly tuned or filters are dirty).
CNG is less sensitive to such things, but costs more to install and maintain (pressure in fuel tanks is around 3,000 psi and corresponding fuel lines and closing valves are costly, not mentioning pressure converter)
With any gas, depending on tuning and used equipment, you'll loose 5-20% power and get 5-15% worst fuel economy. So, this alone rules out gas for sporty cars.
But for DD, it is a very good alternative. As I pointed out earlier, I drove ~100K miles total on LPG in EU, which is rather popular alternative fuel there , especially in NL, PO, RU, BG, even DM despite of popularity of diesel cars.
Also, digging around, found this nice talk. If you have time, watch it. Pickens is a smart old man:
[ame="http://www.youtube.com/watch?v=EnmG87c2roE"]T. Boone Pickens on America's Energy Future - YouTube[/ame]
I may even buy some of his company stocks, man has a point and a plan.
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