7875 + 5.9 + E85 + Megasquirt

Power does seem smooth! How much timing are you running on the 7psi tune? How does spool compare to the GT45?
About 20* timing. Everything is still super conservative with the tune. This turbo spools maybe a tad quicker than the GT45 but they are very similar. The butt-dyno tells me the old GT45 was a bit stronger on the lower end. That turbo is just a beast for what it is. I think the 7875 will do better on the top end.