750cc injectors on stock ecu Options

[Neon90424]

I am curious if 7500cc injectors if i put them on and hook them to the stock st205 ecu will it work or will the car run pig rich?

[stephen_lee]

fuel map cant be changed. this isnt modifying the ecu at all. its changing the way it reads pressure.


say u have one bar map. (reads vac to 0 psi)
you add a 2 bar map.

guess what? full throttle (0psi) reads as 50% load on engine where the stock map would say 100% load

now lets see what happns at the injectors.. the ecu sees a 50% load, so it fires the injectors at 50%

well the stock 300cc injectors doesnt supply the 280 or so cc the engine needs to run at full throttle cause thyre only firing at 50%... so to correct this you double the injector size(since you doubled the map)

with 600cc injectors running at ~50% you get the correct fueling.