I hope it is ok to ask these here, but i see alot of you guys on here really understand prom tuning sooo...

I've been tuning with Tuner Cats on my 8746 ECM and I am fairly comfortable playing with the spark table and the constants and switches and whatnot, but I am still trying to learn the fuel Table.

The table called Main fuel table#1%volumetric eff. Are all of those numbers just a % of injector on time?

And the Main fuel table #2 vol. eff. adder. What is this table used for. what does it do? does it control all the fueling after 3200 rpms when the other table runs out?

I am just trying to clear things up and understand this. I hope these arent dumb questions and this is not the wrong board

 

https://www.thirdgen.org/forums/2818140-post63.html

 

I feel sheepish

thanks that helped out alot

 

You are welcome............that is a good thread for tuning tbi.