Apexi VAFC how much control do you really have?

ASSISTANCE Hybrids & Advanced Aftermarket Engine Performance
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I am taking advice some of you have given me on getting bigger injectors for my B17. I will at least get RC 270’s but Leo/93B18 said I might need 310s if I use N2O,also Tuan over at Honda-Vision said that I might even need 310s now.I am going to be using a VAFC what I would like to know is if I get bigger injectors than I need can I back the injectors off so I will not dump so much fuel. I can get the 310s cheaper than the 270s and I have a friend that has 440s that I can get for 250.00 they are not peak hold they are sat. Can the VAFC back the 440s of enough?
Thanks

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Re: Apexi VAFC how much control do you really have?

If it’s like the fields, then it does it in percentages of 1% from -20 to +20. But it works best with a wideband O2 sensor cause errors display for me past 14% on the stock O2