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the reason why the afc cant control bigger size injector is that it fools the stock ecu only..so say the stock 550cc is upgrade to 750/800cc thats almost 25% more fuel. u then set the afc to -25% or so and the stock ecu will see the 750/800 as 550cc..not an accurate but that the concept..
also because of the way the stock ecu run the inject its hard to set up the afc correctly.
i've heard that the stock ecu runs the pri inject at 50% when the sec. injector kicks in..so theres no way to run the pri. injector at 75-80% at all.. the rtek can be program to run the pri inj at 75-80% so with just the ecu reprogram u gain about 15-20% more fuel from the pri inj when the sec. inj kicks in.
if anyone else can correct me or help out with this post plz do..
gao
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