Flex fuel tunes

[utm18]

Anybody running the flex fuel tunes? Pro's or con's vs. A straight E-85 tune?

 

[Unreal]

As far as I know, no mustang ECU supports flex fuel. Never seen one.

I wish it did. Flex fuel rocks.

 

[stkjock]

As far as I know, no mustang ECU supports flex fuel. Never seen one.

I wish it did. Flex fuel rocks.

apparently someone figured out how to use the front O2s in the 13+ (iirc) to get the ECM to figure out what fuel is being used and adjust.

 

[Bullitt 3309]

I am running the Lund version of the Flex fuel tune. Ford uses the front O2's to read ethanol content. HP tuners cracked the ECM for existing Flex fuel vehicles and found that most 2011+ mustangs had the programming, but locked. The thing to realize is the Flex Fuel tune will NOT give the same gains as a dedicated E85 tune but it does give a good measure of protection against detonation and more spark advance. Its more of a convenience since I don't have to check the ethanol content when filling up. If your are looking for max performance, get a dedicated tune.

 

[JEWC_Motorsports]

I am running the Lund version of the Flex fuel tune. Ford uses the front O2's to read ethanol content. HP tuners cracked the ECM for existing Flex fuel vehicles and found that most 2011+ mustangs had the programming, but locked. The thing to realize is the Flex Fuel tune will NOT give the same gains as a dedicated E85 tune but it does give a good measure of protection against detonation and more spark advance. Its more of a convenience since I don't have to check the ethanol content when filling up. If your are looking for max performance, get a dedicated tune.

Dont be mad if it doesnt work for your specific vehicle. lol Because it does not work for every 11+ car. 11-14 you will need 47 lb injectors.

 

[Unreal]

Why would it not work the same as a dedicated e85 tune? On GM is auto adjust from any value from 0-100% ethanol, and you can setup the flex fuel maps for as aggressive or not as you want. I have my corvette adding 5 degrees on e85 over e0.

 

[utm18]

I am running the Lund version of the Flex fuel tune. Ford uses the front O2's to read ethanol content. HP tuners cracked the ECM for existing Flex fuel vehicles and found that most 2011+ mustangs had the programming, but locked. The thing to realize is the Flex Fuel tune will NOT give the same gains as a dedicated E85 tune but it does give a good measure of protection against detonation and more spark advance. Its more of a convenience since I don't have to check the ethanol content when filling up. If your are looking for max performance, get a dedicated tune.

How do you like the tune? Noticeable difference compared to a 93 tune? I was told by AED that it will work on all 2011 and up cars with the same gains as a E-85 tune only????

 

[JEWC_Motorsports]

I will disagree with AED. Flex Fuel tune does not work on my car and my tuner has said it doesnt work on ALL 2011+

 

[vinylinterior89]

I will disagree with AED. Flex Fuel tune does not work on my car and my tuner has said it doesnt work on ALL 2011+

What tuner are you using? I was thinking about doing it on my 12, but I would hate to buy the 47lb injectors and have it not work.

 

[JEWC_Motorsports]

I am Lund tuned. He said it will work on most cars but there are some that it doesnt work on. I am on a dedicated E85 tune now.

 

[utm18]

I was originally going with a dedicated E-85 tune. But since they have cracked the code for the flex I will try my luck with that. If it doesn't work I just stick with the dedicated E85.
Did lund say why it worked for some but not others?

 

[JEWC_Motorsports]

Some computer codes dont recognize the correct alcohol content.

 

[vinylinterior89]

I am Lund tuned. He said it will work on most cars but there are some that it doesnt work on. I am on a dedicated E85 tune now.

Thanks for the info! I will def email them and see if they know if it will work based on my computer code before I buy injectors. I don't want to do a dedicated E85 tune.

 

[JEWC_Motorsports]

I dont think they know which one it will work on for sure or not. He just said there are some that dont work.

 

[s8v4o]

Can someone tell me how an O2 is supposed to read ethanol content? Doesn't an O2 read sensor read, well oxygen content? I think what is being meant to say is that the O2 reads how rich or lean the system is based on what fuel is being used and adjusts the AFR accordingly. The O2 doesn't know what fuel is being used, it just knows how much oxygen is in the exhaust.

 

[JEWC_Motorsports]

The O2's in the 11+ are widebands, not just O2 sensors.

 

[s8v4o]

I know they are widebands, but how are they supposed to read ethanol content?

 

[utm18]

http://www.hptuners.com/forum/showth...-fuel&p=397647

 

[Wes06]

Link is bad, has a part cutout in the middle

 

[JEWC_Motorsports]

Its something that has always been there in the computer, just never switched on. They work the same as any flex fuel vehicle.