[Ducati] Cooling fuel....? Better cooling air!

HOPPER ELDRIDGE hoppereldridge at sbcglobal.net
Sat May 12 10:56:57 EDT 2007


I can see a slight advantage of cooling  the fuel, but fuel is already in a liquid state and therefore less able to occupy a fixed volume. It might pick up a bit better specific gravity but how much?
   
  The idea I tried to play with when I was drag and road racing my olde S'Norton Commandos was to cool the air down signifcantly. Here I think you can pick up more advantage than with the fuel cooling.
   
  Now the smart person would do a "double dip" and flow his air pass/over the mechanism being used to to cool the fuel and thus cool the air. here in hot humid Texas, you might even reap and added benefit in that some moisture would be introduced to the air stream and have a mild form of water injection (the last item is more tongue-in-cheek in that the modern fuel/combustion chamber/electronic ignition control designs have as much octane in it that compression ratio is a moot point).
   
  I did fool around with water injection on a  olde Goat years ago but the injection system was tied to the engine vacuum which messed with my advance. School and fuel economy was driving the issue so dropped the water injection project. That was when gas octanes were changing faster than a politician's platform. Power timing the advance was a constant exercise to compensate for bad fuel. Still was getting right at 18 mpg on a carbed 455 Pontiac engine. 
   
  Something else that I tried to follow was better fuel atomization. One of the multi-fire ignition companies was using an ultrasonic probe in the intake just below the carb to break up the fuel as it went into the manifold. In a simulation test, the normal process had the fuel shooting staright down where as the test probe with the ultrasonic device had the fuel so broken up, it floated UP! With that huge increase in surface area, the fuel efficiency was darn near perfect! Don't know what happened to the project though. Tried to follow up on it but it was dropped. I was able to gleen information from the secretary whose Charger had been fitted as a test mule and she was tickled pink about the gas mileage increase.
   
  Kinda wonder if injectors could be made to vibrate at "ultra sonic" speeds....
   
  Hmmm...wonder what ever happened to that secretary......Hopper


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