Backfire + Loss of power
 

Was at a local track this weekend and as I was laying down the power around one particular corner every time the car would fuel cut(?) at high rpm, and backfire multiple times.

I have a video of it filmed from my friends car behind me. (I'm the red BRZ).
It backfires three times in this video, two quick small ones as I'm approaching the corner (WOT + 3rd gear), and then one big one as I'm powering out of the corner (WOT + 3rd gear).

https://www.youtube.com/watch?v=xvMs...tu.be&t=16m29s

As soon as I heard the second pop and felt the loss of power, I pulled aside and let my friend pass.

There was no check engine lights after the backfires, and the car was fine everywhere on the track except the same corner for all laps past this.
At this point in the day I had half a tank of gas and this all happens right after a big sweeper.
Would this be enough to fuel starve it?
Could it be a direct injector seal issue?
A while ago, I had a check engine light for P0352 "Ignition Coil "B" Primary/Secondary Circuit" but the light mysteriously went away after a week. Could it have something to do with that?

Engine mods are: OFT E85 tune, Muffler delete, Drop in filter.

Can anyone shed light on what the problem might be?

replace coil pack.

http://www.ft86club.com/forums/showthread.php?t=52688

The consistency of it happening in that turn, especially a long sustained turn, is indicative of fuel starvation. I remember reading a thread once where "half tank is the new empty" or something of that nature. I would think it's a coil pack misfire but there's other straight sections of the course where you don't seem to get that problem when you'd presumably be heavier on the throttle.