I got the car back. I'm currently trying out the Esso 91 Pump Gas Tune.
Below shows a dyno graph outlining E25 to E30 Tune vs Esso 91 Pump Gas Tune. Catback only.
Observations
I think I was expecting it to drive very differently from what stock feels like, but this feels like OEM but with more power.
I was really concerned that it would drastically change the way the car feels from the factory. The car from factory already drives amazing (I know I still haven't gotten to that write-up). At highway speeds, 4th gear is nothing short of AMAZING. Now, 4th gear is remarkable. I used to have a bit of trouble going up a hill in 4th gear, now it's no sweat.
I'm still surprised that the stock fuel pump can handle Ethanol being put into it but apparently this is pretty close to the limit of both injectors and HPFP. Stratified thinks they can squeeze another 15-20hp out of the OEM fuel system, with some efficiency mods. I will not be testing this LOL. I think for 20hp/13tq, it's not worth it to me, to run an ethanol blend. I just don't understand how it works and it's potential mechanical damage.
With all that being said, I'm quite satisfied with their work and methodologies. I'm excited to continue to test different parts with science!