Optimum injector selection

[khearn at SCUACC.SCU.EDU]

This is a little rule of thumb that an engineer at
Bosch told me for estimating injector size (#/hr).

You must first know the BSFC of you fuel.  Pump gas is 
~.4 to .5, M85 is about .9. (I don't recall what BSFC stands for,
but the units are #/(hp*hr)). Then estimate your final engine 
horsepower...it doesn't hurt to be a little optimistic here. However, you 
should take an educated guess.  Finally, multiply that horsepower with the 
BSFC. This gives you the amount of #/hr that your whole engine needs. Divide
that number by number of cylinders to get the size of injectors (if you're
doing port injection).

Ex.                est. hp.= 100
	  no. of cylinders =   4
                      BSFC =   .5

	injector size=	(100*.5)/4 ~ 12.5

*these numbers were chosen just so I could do the math in my head*

I am not a professional, just a student.   So if anyone knows if this
relationship is false, please post a correction.

Hope this helps!

Kris Hearn