im thinking of going with a new setup for my wrx wich will be primarily used for road race.

pe1818
600+ cc injectors
fuel rails
crank pully
high flow pump
some kind of manifold
and most likely a perrin front mount

the only thing im up in the air about is how much boost to run and what form of engine managemen. i was thinking ecuteck but honestly i would like to go with the link standalone.

one more thing can a map be made for 20lbs on 91 octane or will that have to be 100 octaine only?

if im missing anything please post.
i already have the up pipe, dp, exhaust

 

20psi with that setup and proper tuning should be just fine.