Its not that its necessary or not. It would allow you to run more timing/boost. You should be able to run 10psi on 93 with the right tune. But at the same psi with E85 you could run more timing, making more power.
Its not that its necessary or not. It would allow you to run more timing/boost. You should be able to run 10psi on 93 with the right tune. But at the same psi with E85 you could run more timing, making more power.