injector upgrade

[Deane]

hey Whats the best way to set ecu for bigger injectors, 510cc to 800cc . will changing the master setting work or will it still be too rich due to fuel pressure increase wile on boost Cheers

[Simon]

Moving the master will be a good start.

You will still have to check the mixtures through the full operating range. 

Making adjustments as needed to the zone or row fuel.

[Brett Whinnen]

You can roughly calculate the value to change the master to given the ratio difference of you old to new injectors. This will get you _pretty_ close. But you will have to always then modify zones to suit. I did this moving from a set of 440cc to 700cc injectors with minimal re-tuning required.