http://www.msextra.com/manuals/MS_Ex....htm#constants
That gives you a bit of an idea of what injector opening time is like. You can pretty much just say 15msec to open the injectors and be close enough for most cars. When the injector closes you could just subtract that amount from the calculated open time.
I really need to get the stuff to build one of these, closest chip I have right now is an atmega32 chip and I don't feel like trying to recompile everything to run on it. I do have several 16x2 displays as well as some 40x4
