What I understood were I was about a 15-20 whp gains with switching and the car made nice tq also. The cons would be of your not close to any pumps otherwise it's cleaner cheaper and makes more power. I will say I lost mpg but If that's a concern then it's probably the wrong hobby.
And yes u can change ur map and put 93 aslong as u have a tune for it. But I personally don't like it just cause no matter how u look at it ur not putting 93 back in a bone dry tank with bone dry lines. It's just not my preference but to each is own. Another thing to look for is the o-rings expanding on ur injectors switching back and forth. With ID's I've never seen that problem but I have with rc and duetschwerks
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