I'm using tunercat and I was wondering how to retard timing and richen up the fuel. I just bought a s/c and was wondering which tables that I had to change and which cells in those tables I should change. I changed the injector flow rate in the ecm constant table. I put 30, but should I put 32 b/c they are FMS injectors, and they flow around 32 with the psi diff.

Also what else should I change from going from 24# injectors to 30# ones?

Mods are in sig.

 

With FMS injectors I believe the value should be around 31.6-31.7 with fuel psi set @ 43.5.

Have you logged anything as to point to be lean or that you are getting KR?

 

I haven't logged anything, I just wanted to get a program before I ran it too hard. And I wanted to back out the timing, and richen up a little so I can work from there.

 

You should also change the injector offsets, since the Ford injectors take a different time to open than the GM ones. A search would probably yield some results on where to get them. Since this is an additive factor to the pulsewidth it will affect your idle more than anywhere else.

You should put the fuel-pressure corrected number in for the injector size.

You can only richen up fuel in the PE tables (meaning WOT). I recommend doing this with a wideband O2.

You will probably want to retard the timing in the 95 and 100 kpa columns in the main and extended spark tables. How much I couldn't say. Assuming you are not running a BTM.