Injector sizing

[Tlsalt at aol.com]

Hello all,

    I have a question about injector sizing.  Does anyone know of a torque 
based injector sizing formula ? All of the formulas I've seen use horsepower 
to determine injector size.  I am looking at a supercharged application and 
am a little puzzled about the torque output.  If maximum VE occurs at the 
torque peak, won't the highest fuel requirement be at peak torque?  I realize 
fuel consumption will be highest over time at higher rpm, but I'm interested 
in maximum pulsewidth.  For example, I have a 3.8 liter engine with 270cc 
injectors that has around 240 hp and 230 ft/lbs of torque.  I am looking at 
another 3.8 liter engine that is supercharged with 350 ft/lbs of torque and 
less horsepower ! (how do they do that ?)  Obviously it takes more fuel to 
make an additional 120 ft/lbs of torque.  Does the higher BSFC (0.55 lbs vs 
0.45lbs) in the formula enough for this difference?  Am I missing something?

Paul
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