Hi all this may be of use to someone

[Airbrush guy]

HI all, Ive been on a steep learning curve with the pcm tuning and have read vast mounts here nd other groups nd tried endless combinations of tunes and think I'm settled with this so far, its not perfect but runs nice and smooth , although did end up using stock marine 4bar fpr with the marine 24lb injectors and found a thread about calculating injector offset vs bat voltage which made all the difference so popped that into a spreadsheet and have included the bin too, any suggestions or input welcomed as still learning and hope this may be of use to others too.

so my astro is 95 4.3 l35 (was cpi), vortec heads fitted, marine inlet, std marine bosch injectors and fpr, marine throttle body, base timing is set at 0 degrees, 727 pcm $0D mask


Thanks
Gary

[THEFERMANATOR]

I did alot of injector research and I ended up using the injector values from a 02 LS1. There injectors were 25.2 lb/hr at 43.5 psi which is identical to the marine injectors. The only difference I could find between them was the LS1 use an EV1 plug and the marines use an EV6 plug. I plugged in the LS1 values and it purrs like a kitten with fuel trims as close to 0 as you could ask for.

[Airbrush guy]

I've looked for alternative specs to dial in the injectors but not had much luck untill found that calculation, I don't suppose you have the values still as really don't need to run the 4bar fpr?
Thanks