Maybe I'm thinking TOO deep into this, but what does the # of cylinder constant do in the .bin ?

Since the value is set to zero, does this basically mean the injectors all fire at the same time (batch fire) or does it mean something else?

Also, cylinder volume constant, does any table use this value? The stock AUJP is set to 713 cc (350 ci), I of course set mine to 726 cc (355ci). Will changing this constant affect anything?

 

The 0 is just the value the code looks at to determine the number of cylinders. GM chose to make the zero value = 8 cylinder. This effects alot of timing events, so it needs to be set to the right value. There are only a few values that this constant can be. I forget which hac it is in, but the values possible are listed in it, maybe the ANHT? The code for V8 tpi motors is configured as batch fire, in the '730, I don't know if there are other modes of operation.

as for the cylinder volume constant, it should be set to the proper value, since this helps determines the base pulse width of fuel. Together with the VE value(load vs rpm), the injector constant, and other correction factors, they spit out the pulse width needed to get the right fuel amount for a given instant in time. Pretty important to have all these values set correctly, although small changes like an overbore, or inaccuracy in injector flow rate(it really is a guess unless you have actual flow data, and even then, injectors vary) will be compensated for in BLM, provided you aren't grossly incorrect.

hope that helps...