[wordy1]

Originally Posted by Adam Connell

I honestly Did not do a damn thing when I switched to 25% other than turn up the boost 2lbs. I went from 15lbs with MILD knock on 93 to 17lbs on e-85 with next to none... I finally figured out that one of my injectors is dead and one is on the way out so I have 60s on the way... Hopefully I can get the car to run 15-16 w/no knock on 93 and then bump it back up for E-85. My last tank I ran roughly 1/3 E-85 (6 gallons) and saw no issues either but was unable to turn the boost up. Im pretty sure my knock was coming from the lack of fuel so we will see what happens. DO NOT take my word as advice on this, I did it with no problems but that does not mean it will work the same for you!

BTW if you want to know how to get a certain percentage just add how ever many gallons of e-85 to an empty tank it would take. We have 18 gallon tanks so 6 gallons of e-85 topped off with 93 would get you roughly 1/3 e-85... Not an exact science, but you can get close. I would always tune on the safe side if using this method of fuel mixing! Oh 4.5 gal would get you 25% FYI. To make sure you get as close to an accurate percentage as possible try to get the tank as empty as possible before filling up.

You have any direct scan or powerlogger numbers? Sounds like your running out of injector to me.. As more boost with E-85 has not been an issue, I am tempted to raise it more, but am waiting till the spring to go all out...

My ultimate goal is to run 25 psi. with nothing but a 50/50 mix of E85 and gas and ALKY.. with no knock .. with 65 lb/hr injectors.