Cobb FF vs "old style" dual map - Subaru Impreza WRX STI Forums: IWSTI.com
STI Forum
Join
Start New Thread Create Account Advertise FAQ Members List Contact
Cobb FF vs "old style" dual map
Cobb FF vs "old style" dual map
Go Back   STI Forums > > > Cobb FF vs "old style" dual map
Reply
 
Thread Tools
Old 04-21-17, 02:29 AM   #1
Renagade
Advanced Contributor Level 2
Feedback Score: 0 reviews
 
Fav Mod: E85
My Threads
Posts: 237
My Subaru Parts for sale

Join Date: Nov 2013
Location: The Woodlands, TX
Renagade is on a distinguished road
Default Cobb FF vs "old style" dual map

I will try to make this make sense as I ask it.

I am currently running a traditional 93 tune and a E85 tune.

I have a VERY consistant gas station that I use for E85, and I nearly never run anything else but E85

That being said, would I gain/lose power on FF running the same fuel?

I know its tuned on a calibration scale (93 being low | Exx being the high)
Lets say your tuner says the E tune was E80... doe that mean if you have E85 in it, it will only make power up to E80, or can the tune adjust for higher than the calibrated "high" od the E80?

Long story short... is the FF worth the convenience factor for some one who ran 2 1/2 tanks of 93 in 18 months?

-Yes I searched... like crazy

Thanks folks!
Renagade is offline  
Likes 0 Dislikes 0
 
Reply With Quote
Sponsored Links
Advertisement
 
Old 04-21-17, 09:50 AM   #2
SlowInFastOut
Advanced Contributor Level 1
Feedback Score: 0 reviews
 
Car: 2011 Grey Sti Sedan
Fav Mod: 1.5xtr
My Threads
Posts: 125
My Subaru Parts for sale

Join Date: Sep 2016
Location: Massachusetts
SlowInFastOut is on a distinguished road
Default Re: Cobb FF vs "old style" dual map

Quote:
Originally Posted by Renagade View Post
I will try to make this make sense as I ask it.

I am currently running a traditional 93 tune and a E85 tune.

I have a VERY consistant gas station that I use for E85, and I nearly never run anything else but E85

That being said, would I gain/lose power on FF running the same fuel?

I know its tuned on a calibration scale (93 being low | Exx being the high)
Lets say your tuner says the E tune was E80... doe that mean if you have E85 in it, it will only make power up to E80, or can the tune adjust for higher than the calibrated "high" od the E80?

Long story short... is the FF worth the convenience factor for some one who ran 2 1/2 tanks of 93 in 18 months?

-Yes I searched... like crazy

Thanks folks!
The way i saw it in the program there is a maximum and minimum on the FF calibration page. You tune on 93 or e10 and you can vhoose the maximum amount which i would suggest be e90. To make the software more accurate try to run keep blending down the ethanol and type in the values you want for e90, then e85, then e75. It just makes it so that there isnt many hiccups involved when you mix and match ethanol content. It does however adjust on the fly and will only adjust to the max parameters the tuner has set in the map.

Is it worth it? Yes would be my answer. You never know unless you test every tank you fill. But with the FF you have piece of mind, versatility, convienience.
SlowInFastOut is offline  
Likes 0 Dislikes 0
 
Reply With Quote
Old 04-21-17, 10:55 AM   #3
earth0
Advanced Contributor Level 5
Feedback Score: 2 reviews
 
Car: 15 STI
Fav Mod: ELH E85
My Threads
Posts: 533
My Subaru Parts for sale

Join Date: Oct 2014
Location: NY
earth0 is on a distinguished road
Default Re: Cobb FF vs "old style" dual map

I too in love with E85 on my FF and Yes it well worth it. I don't have to worry if i ran out of E85 when i'm out of town. I live in the island. It become more and more E85 station around here.
earth0 is offline  
Likes 0 Dislikes 0
 
Reply With Quote
Sponsored Links
Advertisement
 
Old 04-21-17, 09:08 PM   #4
Renagade
Advanced Contributor Level 2
Feedback Score: 0 reviews
 
Fav Mod: E85
My Threads
Posts: 237
My Subaru Parts for sale

Join Date: Nov 2013
Location: The Woodlands, TX
Renagade is on a distinguished road
Default Re: Cobb FF vs "old style" dual map

Well while I understand the convenience factor, im just curious if it could be a handicap if its tuned on a lower grade of Ethanol than I run normally
Renagade is offline  
Likes 0 Dislikes 0
 
Reply With Quote
Old 04-22-17, 03:15 AM   #5
8cd03gro
Advanced Mastery Level I
Feedback Score: 0 reviews
 
Fav Mod: Rotated 30R + E85
My Subaru Parts for sale

Join Date: Mar 2008
Location: Denver
8cd03gro has a spectacular aura about8cd03gro has a spectacular aura about
Default Re: Cobb FF vs "old style" dual map

If you can consistently get E85 then why would you have a tank of E80 when you go to your tuner?
8cd03gro is offline  
Likes 0 Dislikes 0
 
Reply With Quote
Old 04-22-17, 05:29 AM   #6
SlowInFastOut
Advanced Contributor Level 1
Feedback Score: 0 reviews
 
Car: 2011 Grey Sti Sedan
Fav Mod: 1.5xtr
My Threads
Posts: 125
My Subaru Parts for sale

Join Date: Sep 2016
Location: Massachusetts
SlowInFastOut is on a distinguished road
Default Re: Cobb FF vs "old style" dual map

Quote:
Originally Posted by Renagade View Post
Well while I understand the convenience factor, im just curious if it could be a handicap if its tuned on a lower grade of Ethanol than I run normally
Thats why i said that if you get the FF kit, when you get tuned to above what you usually run ex. E90 and set it and forget it.
SlowInFastOut is offline  
Likes 0 Dislikes 0
 
Reply With Quote
Old 05-08-17, 01:52 PM   #7
chomorro
Active Participant
Feedback Score: 0 reviews
 
Fav Mod: Coming Soon
My Threads
Posts: 7
My Subaru Parts for sale

Join Date: Apr 2016
chomorro is an unknown quantity at this point
Default Re: Cobb FF vs "old style" dual map

im in the same boat I was cobb socal tuned on e85 only and really haven't had any issues but I also don't know the actual ethanol content of each fill up. Haven't had any knock or anything and I was tuned 2 years ago with built motor and big turbo.

Thinking of upgrading to the flex fuel just for piece of mind and because I "heard" its good to run blends or 91 octane for a full tank every 6 months to lubricate parts or some BS but again I have had no problems. I also heard its safer in case you get a winter e85 blend.

I would never run anything other then e85 at the pump so its tough to decide of that extra $800 kit is worth it or not to install before my next tune check up.
chomorro is offline  
Likes 0 Dislikes 0
 
Reply With Quote
Sponsored Links
Advertisement
 
Reply

Thread Tools

Posting Rules
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


New To Site? Need Help? More

All times are GMT -8. The time now is 12:11 AM.


Powered by vBulletin
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.
Designed & Powered by Domain Architect