I've seen the question of "How big do my injectors need to be for XXX horsepower?" With more and more Contique Zetecers going FI, here's some good info.
(injectors size*number of injectors)/0.55=Crank Horsepower
19# Injectors=(19*4)/0.55=138HP
24# Injectors=(24*4)/0.55=175HP30# Injectors=(30*4)/0.55=218HP
42# Injectors=(42*4)/0.55=305HP50# Injectors=(50*4)/0.55=363HP
60# Injectors=(60*4)/0.55=436HP61# Injectors=(61*4)/0.55=444HP
71# Injectors=(71*4)/0.55=516HPPlease keep in mind that these numbers are all for
crank horsepower and that you never want to run an injector wide open. With a 90% duty cycle you would get the following...
19# Injectors=((19*4)/0.55)0.90=124HP
24# Injectors=((24*4)/0.55)0.90=157HP30# Injectors=((30*4)/0.55)0.90=196HP
42# Injectors=((42*4)/0.55)0.90=275HP50# Injectors=((50*4)/0.55)0.90=327HP
60# Injectors=((60*4)/0.55)0.90=393HP61# Injectors=((61*4)/0.55)0.90=399HP
71# Injectors=((71*4)/0.55)0.90=465HPAgain, these numbers are all for
crank horsepower. You would loose an additional 10-15% of your horsepower with a manual and 15-20% with an ATX.
You also want high impedance injectors that have Bosch (EV1) style connectors.
CFM carries them in sets of four and have very good prices.
McNews Automotive also carries the Ford Racing injectos in sets of four.
I hope this helps.
Later,
Ben