lkni3010 speaks the truth.
I have been running non-intercooled E85 Turbo EFI set up for 5 years now. Its mainly a street car....but sees the track 3-4 times a year.
Its a 418" SBF with a 84mm FI Borg Turbo. I usually set it at 20psi...but have went as high as 24. The car runs great.....but you have to very careful with timing.
I have NGK 10's, gapped at .018....the motor is 10:1 compression....the inlet temp sensor pegs within a second of a typical run at 255 degrees.....so who knows what it actually gets to.
Timing must be very conservative. I tried to run upwards of 19-20 on 20psi and it melted a piston.....I backed it down to 17 and it lifted a gasket. Now at 14-15 its pretty reliable.
I choose the non-intercooler set up because I didn't want the intercooler packaging clogging up my radiator and I wanted a more clean/easy to maintain set up. I know a good A/A would help in performance and an A/W may help even more.....but I really like the way this is all self contained.