Digital Tuning T4m0 - Dial In The Injectors

Can't you just increase the rail pressure?

Hey Mr. Lizzard!

This calculator is handy for flow rate change calculations (it's not exactly a 1:1 ratio to pressure):
RC Fuel Injection

To save you the trouble, 39psi is about 200cc/min, so 19lb injectors rated at 43.5psi will flow ~18 at 39psi.

So I'd go with 18psi hi, I'd use about 24-25 for lo myself. A lot depends on your specific injectors -- more modern designs are less sloppy at low pulsewidths. If they're a good brand (not some eBay injectors that have disappointed me before) go on the low side (24) for lo slope.

If you have an AFPR you could move up to 43.5, or even higher if your injectors support it, but if you don't those settings should take care of you.

Just a note, the difference between 18 & 19 is going to be pretty small, probably within the EEC's ability to adjust. So personally I wouldn't do too much other setting changes (breakpoint, min pulsewidth, battery offset) -- those are probably close enough.