Hi,
I turbo'd my 5 liter way back when and tried some stuff.
If you use a Ford EEC IV setup I would go with the 24 lb injectors for up to 7 psi boost with no intercooler, and the 30 lb injectors if you want 8 to 10 lbs boost, anything more and you need a custom computor and O ringed heads. Also use the Ford mass air meter ,don't get a cheap meter, otherwise go with a custom Pro M meter calibration. Use an ignition boost retard, calibrated FMU and a minimum of a 190 lph fuel pump.
BTW I had 7 psi boost on stock 19 lb injectors ,no intercooler,as in '87 there was NO speed equipment for efi mustangs yet, still it went from 14.2 down to 12.4 @ 114 mph at the all Ford drags in Bremerton,Wa.
Good Luck,
Perry.
