Originally Posted by
JR92RS
i would like to wrap my mind around the changes you made, and why
for example i understand the flow rate vs. kpa change= make the computer think i'm running larger injectors to cut down the ipw ....at least that's how i comprehended it, or because they were tested at 43.5 psi and running on a 58 psi system they flow more than advertised.
coments:
for the min inj pw and the default inj pw it looks like you are just reducing the ipw = which i read in a few other threads and seems logical.
coments:
for the injector offset vs. battery voltage vs. kpa vac = i compared the stock tune to yours and it appears you are pulling fuel from 6-18 volts and 0 - 80 kpa vac .....if that's what the negative difference number represents in the table? which would make sense
coments:
now the short pulse adder is where i get lost, it appears everything over 1.34 ms too 3.999ms you have zero'd out. if i understand correctly the short pulse adder is just making corrections to the non-linear area of an injectors mechanical range which is from 0 too 4.00ms and affects nothing after 4ms. if that is a correct understanding, then wouldn't it be better to calculate the % bigger these injectors are compared to stock (because they flow more), then reduce the pulse width adder table by that same % that way your not eliminating all ability to correct the pulse widths altogether ?
coments:
now for cranking fuel tab- i assume it does what is implied....just correct fueling during cranking, then some other table (some idle table) kicks in and takes over. i don't have any issues with starting she fires up within 1-2 seconds (i only really ever have to bump the key)
but from what i see when comparing to the original tune it looks like in stage 1 you just pulled out fuel....which i get
but in stage 2 it looks like you pulled fuel with most of the table , but added fuel in the -40 to 50 degree, rows 0-7 range....is that conclusion correct and if so why?
coments:
what are the reasons for changing the fuel pump prime run time?
coments
feel free to copy and paste this message, then just add in your comments after each of my conclusions or questions, and thank you for your time