Originally Posted by Cookiemonster
The subaru guys had a problem running lean. I guess it all depends on how much gas your injectors can squirt out. They have to max out there duty cycle at some point. Especially with a procede ontop of that. But I have no idea if you can max out direct injection or not. But running lean is and should be one of your number one concerns no matter what type of ecu or piggy back you have. Lean is no laughing matter.
That is true but IMHO if you tune your engine such that this little contraption pushes you over the max pulse width edge, You didn't have enough margin in your injector setup to begin with.