first things first, e85, dont bother you can make 300 on pump with a kenugawa t67, relatively responsive and on a dead stock motor, you want an sr to last, leve it the fuck alone internally.
you realise chasing the 220kw+ mark wont make your car any faster its live axle and light as fuck, run a 150-170 kw 4agte with mild work and itll last ages