I have a fairly new to me 2005 mustang gt with a stroked 5.0 3v and a 2.3 whipple. I just added another 5psi with a pulley change and changed out the 39lb ford injectors for the 52lb 2014 gt500 injectors. I tired 2 different data inputs for the 52's; data from a stock 2014 gt500 and data from ford racing for 9593-mu52 injectors which did not match each other. Both versions idled decently, but would get a bit lean and would go lean in throttle input.

I decided to compare the injector data in my original tune with what was on fords website for these injectors and it does not match either.

What injector info should I be using? the original tune was pretty solid with the 39lb injectors.

39lb my original tune
05 gt500 clone.hpt

39lb from repository. this is close to my original tune but has differences.
39lb injectors.hpt

ford racing data 52lb
05 gt500 clone 2 52lb.hpt

2014 gt500 data
05 gt500 clone 2 52lb 2014.hpt

thanks,

chris