spent a tremendous amount of time pondering my fuel injection game plan. my evo 1 has been running a dual fuel setup of my own design for last four years. it consists of 780cc primary injectors running on 93 octane. and two 650cc E99 secondary injectors that turn on at 4psi and mirror the duty cycle of the primaries. this allows no special tuning. you just need to be aware of where your turn on point is in the fuel map. then just tune as normal. I had originally planned to just copy the setup but use four 335cc injectors spraying eth. but there were some things about that I didnt like. primarily very limited to injection amount and the fear if one injector fails only one cylinder goes lean. far better to have all four cylinders go lean if one of the ethanol injectors fails. plus I really wanted to try a small injector pre turbo. so here is what I have come up with.
primary injectors 650cc at 4bar fuel pressure.
two secondary 650cc at 4bar.
one 178cc pre turbo. at 6bar
secondary injectors will be staged. 650/178 at 4psi as before. then trigger last 650 one or two fuel cells later ~10psi
the evo 1 runs ~e37 or there abouts
this system will run around e43 with better atomization.
pretty excited to see how it works. the wildcard being the pre turbo injector. waiting for the rest of the parts to arrive.
windows 7 screen shot
windows 7 screen shot