Weird stumble WOT in boost
 

Recently added E85 to the car and have been tuning it. Went to do a pull and I felt the car stumble a tiny bit twice (shown in the log). It doesn't seem to be pointing to anything on the road as the duty cycle fluctuates the same time I felt the stumbling and the ECU caught the rpm's changing. AFRs look good to me though so I'm not quite sure what it is. Currently is just Brain's spark map, and I've adjusted fuel for the E85 and what not.

EDIT: Another thing I have noticed. During idle, I can feel a similar "bump" or stumble just sitting still idling. It isn't severe but it does feel like a small hiccup, nothing serious. Maybe fouled plug? In the beginning of tuning E85 I did run stupid rich and AE didn't help. Not sure how a plug would affect the duty cycle readings though.

Recent changes with the car regarding fuel have been a DW200 and a flex sensor. Along with gates barricade hoses for the ethanol. Running FF 640s. Edit: And a new Wix fuel filter
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Tune and logs are attached.