ebacherville -
I think this works, but you need to design a system that has discreet control over the fuel temp, especially in gassers. If the gasoline gets too hot, you can experience
vapor lock (
http://en.wikipedia.org/wiki/Vapour_lock). The "no cost" way to heat the fuel is to use the coolant hose as a heater, but that means you lose the discreet control I was talking about.
Here is one (for diesels) that uses engine coolant :
IN-LINE FUEL WARMERS
http://www.arctic-fox.com/sitepages/pid43.php
Here is another electric powered one for diesels that I would be terrified to use on gassers :
HotlineŽ Electric In-Line Fuel Heater
http://www.arctic-fox.com/sitepages/pid20.php
CarloSW2