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SAN FRANCISCO (Reuters) -- California filed suit against Ford Motor Co., General Motors, Toyota Motor Corp. Honda, Nissan and Chrysler charging that greenhouse gases from their vehicles have cost the state millions of dollars. State Attorney General Bill Lockyer said the lawsuit filed in U.S. District Court in Northern California was the first of its kind to seek to hold manufacturers liable for the damages caused by their vehicles' emissions-click for more.
Will the Groove help a Propane Engine? PDF Print E-mail

Theoretically Yes.
Propane is a very slow burning fuel. Converted engines benefit from advancing the timing over gasoline settings because it takes so long for the chemical energy in the propane to convert into thermal energy durring combustion. The grooves promote a "gust of wind" on the compression stroke that would help to better homogenize the propane with the air, then the warm jet stream on the power stroke would carry the flame front around the cylinder to "take the fire to the fuel" quicker. By helping the propane to combust quicker, more energy would be released earlier in the power stroke. This would convert more of the heat energy in the fuel into crankshaft power (Brake Specific Fuel Consumption, or BSFC for short).

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