7875 + 5.9 + E85 + Megasquirt

subcom said
As usual, you ask me the tough questions that make me doubt my decisions...lol...but I honestly appreciate it.
I *think* I might be close on the injectors but with a goal of 650 FWHP I might be pushing it also. At that point my options would be to go bigger, dilute the E85 to E70 or similar, or maybe spray more meth. The injectors flowed at 38lb/hr at 58psi and 50% duty cycle at 5000rpm according to the shop I bought them from. I'm not sure if they scale linearly (100% duty = 76lb/hr?) or not, but looking at my log from earlier today where I hit about 7psi of boost, Megalogviewer seems to back up that 38lb/hr flow rate...if I did the math right and the numbers are accurate.
View attachment 1715643807 View attachment 1715643808

I plugged 650whp and e85 in to fiveomotorsports.com sizing calculator and it spit out this...

Bottom right. Turbocharged on e85 they recommend a 93lb/hr injector. My rule of thumb is when I think I have enough fuel pump or injector, I double it. I use their (five o) 1000cc injectors on my Honda j35 and they idle like stock and flow a ton. Just food for thought. Watch the duty cycle and the AFR and if you run up against the limit it’s easy to swap em out later.