Ford Focus Forum, Ford Focus ST Forum, Ford Focus RS Forum - View Single Post - 400 miles per tank club?
View Single Post
Old 01-02-2013, 07:34 AM   #12
3rd Time's the Charm
Slo86GT's Avatar
Join Date: Aug 2011
Fan#: 88885
Location: Spring, TX
What I Drive: 2014 Oxford White ST3

Posts: 1,661
Points 4,994, Level 45
Points: 4,994, Level: 45 Points: 4,994, Level: 45 Points: 4,994, Level: 45
Level Up 22% Completed
Level up: 22% Level up: 22% Level up: 22%
Forum Activity 14%
Activity: 14% Activity: 14% Activity: 14%
FF Reputation: 5 Slo86GT Good Standing Member
Buy-Sell-Trade Rating: (1)
Originally Posted by suss6052 View Post
Why on earth would you run E85 on purpose? E85 gets close to 30+ % poorer fuel economy as it has roughly 33% less energy.
When 87 octane was touching the $4.25/gal here 9 months ago or so, I noticed that the E85 was FAR behind on the price hikes, and didn't go over $3/gal, making the 30% less efficiency trade off pretty much moot.

Right now the E85 and 87 octane are similarly priced, which makes NO sense to run the E85 on, but in the future, I will probably be setting up my '86 Mustang's new engine for E85. It runs cleaner than 93 octane, and you can run around 5 degrees more timing to take advantage of the knock-resistance. The only upgrade required to run the E85 is 30% larger injectors and a twist of the distributor. Voila. Enjoy your extra low end torque.

Has anyone done 87 vs 93 vs E85 dyno testing with the FlexFuel Focii? I'd love to see if the ECU takes advantage of the 12:1 compression on E85 like it SHOULD be able to.
2014 OW Focus ST - Daily
2003 OW Mustang GT - Wife's Daily
1986 BK Mustang GT - Toy
- Jody -
Slo86GT is offline  
    Reply With Quote