Actually now that I think about this....SPECIFY and insist on them supplying it with the Precission Airmotive FCU, or if you want the Airflow Performance, but not the AVSTAR.
Too many AVSTAR units so far have been flowing way under the required takeoff fuel flow and they are not field adjustable.
I recently installed an Avstar fuel injection on my ECI O-360.
Don Rivera from Air Flow Performance was good enough to supply me with a 7/8's inch spacer to make up the difference in height between a carb and servo.
So the filtered air box still matched up with the cowl scoop.
The Avstar unit was ordered with a reverse mixture arm, so with a Vans supplied Injection cable bracket, my existing throttle and mixture cables worked perfectly.
My (gami?) spread is probably around .2 and I fly around at 30 degrees LOP with the stock injectors from Avstar. At that power setting, at 10K, 60% pwr I'm running 7.5 gph and 168 KTAS.
In reviewing my engine data from some recent flights, I am seeing 15.5 to 16.5 gph at takeoff/climb WOT 2660RPM. CHT's around 340 to 350
EGT at that fuel flow at 1320 degrees, peaks usually occur around 1450.
So, is my Avstar running to lean at Takeoff????
I'm very happy with my Avstar unit and with the support from Avstar.
This was an out of the box installation with NO adjustments whatsoever except for idle speed and mixture.
Maybe I just got lucky!