I'm also getting tuned by PTF, pump and E50 maps. The pump is done, I have a ton of logs but I haven't had time to do a same day compare of OTS vs PTF pump map.
Actually, I was more eager starting the E50 blend map but after trying the very first blend map, my clutch started slipping during WOT. There is just that much more torque. So now I'm waiting for my HPF stage 2 clutch.
Once my clutch is installed and broken in, I will probably do a couple consistent runs on OTS vs PTF pump map before proceeding on to E50.
By the way, 9 gallons of E85 + 7 gallons of pump will equal to about E52. Nice round numbers to remember when going to fill up at max capacity.
Engine: MOTIV 750 / MOTIV Port Injection / Fuel-It! Stage 3 LPFP / Helix FMIC / ER CP + TiaL BOV
Tuning: JB4 MAC_11 / MHD BMS Backend / Split Second AIC1-V6H
Suspension: Bilstein PSS9 / Full M3 Suspension / Quaife LSD / Defiv Lockdown / Megan Toe Arms | Wheels/Tires: Forgestar F14 19x8.5F +34 / 19x10R +38 / Michelin PSS