Propane Motor Fuel Injection

[BradyEng at aol.com]

Pressurizing the tank with nitrogen would be an effective tactic as long as
the propane in the tank was liquid and the pickup was below the liquid level.
 A baffled tank would help this quite a bit if obtainable.  Using the
nitrogen to maintain a high constant pressure would increase the likelyhood
of having liquid at the pickup.  Venting the nitrogen prior to filling would
remove the filling problem, although it would be worth calculating the volume
of unburned hydrocarbons you would be putting into the atmosphere, this would
be traded off against the garbage you didn't put into the air by burning
gasoline.

I don't have any experience with, but have read about the N2O guys using
pulsed solenoids to ramp up the flow rate to soften the initial hit.  You
might look at the stuff they are using as far as solenoids and distribution
systems.  It may be possible to build a TBI system with their stuff.  

The computer compensation for pressure scheme sounds good.  You could use a
regulator to cut down on some of the dynamic range.

For real power or efficiency with propane, the compression needs to be
increased.

Good Luck.

SBrady