My car has been getting rebuilt a while and while it's been gone I decided to swap to e85. Changing fuel only what might be the gains? 18-19lbs boost, return fuel, Kenne Bell 2.8 and ID1000s. I am leaving it up to my tuner to turn up the boost as long as he feels its safe. So, gains on just e85 and gains on e85 and 23lbs?