Question regarding Injector and igntion harness???

[mhamrick]

I have the Injector and Ignition harness for my motor. I have read that with the Injector harness I can actually control the injector bandwidth it somewhat. Say the Injector bandwidth is 50%, I can adjust the injector by a factor of up t0 50% of what the stock map is. So if it was 50% then I can run it up to 75%. I can not take fuel away with t but I can at the AFM adjustment.

I also wanted to ask how simple is the adjustment on the ignition harness? How does it work?

I wanted to ask if this is correct? Thanks

[Accord2nrz]

By bandwith I am assuming you are referring to duty cycles and actual flow rates. Just as with other variables the emanage blue can push any activated feature to 50% over factory. So if your factory injectors are say 310cc You can effectively control anything up to 465cc. I am reluctant to believe your injectors are functioning WOT at 50% but I've seen stranger things.

Your injectory duty cycles will show as a percentage on your support tool. You can run your injectors all the way to 100% duty cycle but I would say you need to aim for nothing above 75% to give yourself a good safety margin.

[Turbineguy]

Rule of thumb for max IDCs industry wide is 80% of rated max. Admin is correct though with the 75% number. If you can get injectors to idle well and still have enough headroom to run around that percentage it'll be much easier to tune. The closer the injectors get to 100% the more the latency has an effect and once you get to 100% the injector will go static and the only way to get more fuel is to increase pressure. This usually ends up as a lean condition and can also burn out the coils in the injector.

Best way to size injectors is to find out your required fuel flow based on a BSFC of .50 for NA or .60 for FI. Once you know what you need for fuel find an injector with that specific fuel output plus 25%. Something else to pay attention to is what pressure the injectors are rated at versus what the system pressure is on your particular setup and adjust the injector size accordingly. Alternately you can run an adjustable FPR and set it at the rated pressure of the injector. The adjustable FPR will also allow for another avenue of tuning as well.

T