E85: why aren't more folks running it?

[Process]

Umm go buy an f150. This is how it works. Go talk to Eric Brooks at hptuners. All that needs to happen is the tables need enabled in the tune.

There have been a few folks who have had the strategy unlocked and have been using his function in their mustangs today.

The widebands are the devices that set the learning mode based on how far the fuel trims are set out from the defined norm.

As said before there is no difference between the f150 pcm and the mustang. Just the strategy that's on it.

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[RSKTAKR]

Soooo am I understanding that there is some option in HPT to "enable flex fuel" on these PCM's or ONLY on the f150's?

 

[Process]

You are to understand that some strategies have been turned on in hptuners as a test that enable the flex fuel tables found in the f150 strategy. There is zero equipment difference between a f150 and a mustang.

A few people have this enabled today and have been testing it on their mustangs. It is enabled from the factory on the f150.

 

[RSKTAKR]

You are to understand that some strategies have been turned on in hptuners as a test that enable the flex fuel tables found in the f150 strategy. There is zero equipment difference between a f150 and a mustang.

A few people have this enabled today and have been testing it on their mustangs. It is enabled from the factory on the f150.

hmmmm INTERESTING!! I'm going to have to look into this!

 

[dubster99]

You are to understand that some strategies have been turned on in hptuners as a test that enable the flex fuel tables found in the f150 strategy. There is zero equipment difference between a f150 and a mustang.

A few people have this enabled today and have been testing it on their mustangs. It is enabled from the factory on the f150.

Would someone not self tuning their car (bama, lund, etc) be able to do this as well? Would they do it?

 

[Process]

Bama and Lund aren't defining parameters in tuning suites. They are consumers of what the tuning suite companies decrypt.

When the companies release the parameter then tuners can then use the functions.

 

[dubster99]

Or if they release the parameter.

 

[kris5597]

I'll definitely be getting Eric's input. I highly doubt it's as simple as turning on the tables. Unless the tables by default are already scaled for the exact ethanol you will be running.

 

[Process]

You essentially scale it as a max value. The ethanol content percentage will then scale timing stoich etc compared to the gas spark tables.

So one spectrum is a pure ethanol table and the other is pure gas. Your content will be the average value.

It takes dialing in but it does work. For what it's worth Eric is my tuner.

Having his function enabled would've came in handy a few weeks ago because I got a bad tank of ethanol. Idle was all messed up from it. Had to get rid of it. Once I did was all smooth sailing

 

[kris5597]

Thats great info to know. Thanks for sharing. I would like to do some investigating of my own with the software and this capability.

This further proves my point that just running an e85 tune and putting the fuel in is not safe unless carefully calibrated.

Kris

 

[Reds197]

Essentially when a fuel level increase is detected and the wideband registers a trim outside of the normal, it goes into a few minute learning mode and adjusts stoich and timing based on the ethanol detected from the way the trims go out of reach.

THIS IS EXACTLY THE CASE. Most tuners send a STOICH tune to adjust for fuel quality. This means you don't have to test at every fill up. Since he was properly tuned and got a bad tank of E85 it saved the motor.

If you are tuned for E85 and get E50 the car will be rich. While not perfect, rich is better than lean.

Who tests 91 on every fill up? What happens when you get a bad tank?

 

[kris5597]

THIS IS EXACTLY THE CASE. Most tuners send a STOICH tune to adjust for fuel quality. This means you don't have to test at every fill up. Since he was properly tuned and got a bad tank of E85 it saved the motor.

If you are tuned for E85 and get E50 the car will be rich. While not perfect, rich is better than lean.

Who tests 91 on every fill up? What happens when you get a bad tank?

Well, 91 and 93 don't have the same side effects of running different amounts of ethanol. Ethanol quantities can do major changes to the tune, 87-93, as long as the ecu permits, will reduce ignition timing to prevent knock. However, without the proper calibration, the ecu will not adjust for ethanol differences. Running e85 without the proper tune is extremely dangerous, running 87 on an engine tuned for 93 is also extremely dangerous, depending on the engine and ecu.

Kris

 

[Process]

You can run 87 on a 93 tune. Just don't go wot.

 

[ohmy350]

Up here in Minnesota, E-85 is available at almost every gas station- at least in the metro area. Prices are generally between $.30-$.80 a gallon cheaper, depending on gas prices. The lower the "normal" gas prices are the less amount of discount for E-85. Now, that's for 87 octane. For 91-93? Can be over a dollar cheaper, as stated in this thread earlier.


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[Reds197]

Tuned on E85 knock adjusts. It pulls timing just the same as a 91 tune. I can show you logs.

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