Want to run E85?

[GMPX]

Hi All,

We get a number of Emails asking what is needed to be able to run E85.
I've posted this in the GenIV section because this (for the moment) is targeted specifically to GenIV ECM's.

The most common questions are (which I don't know the answers to) -

1 - Will using E85 corrode anything in my late model vehicle?
2 - Will my injectors / fuel pump be able to flow enough to run E85 AFR's?

We recently added (yet to be released) some new calibrations for the E38 / E67 which will allow people to tell the ECM the vehicle is an E85 engine and be able to lock the E85 default percentage to whatever they want without using a $400 sensor or using the ECM's E85 prediction model which is quite complex and might not work on all vehicles because LOT's of calibrations need to be set up for it to work.

Any E85 experts here?
(Oh, this isn't a discussion about the pros/cons of E85 either )

Cheers,
Ross

[chevy052500hd]

There is a forumla on the megasquirt site for calculating injector size with e85. They base it off of hp and number of injectors to give you the size you would need. The only thing is doesn't give you is fuel pressure, so I assume that the number they give you is at 43.5 psi. I found it by searching google
here's the link http://www.megamanual.com/flexfuel.htm

[Chevy366]

I am no expert by no means , here is what I have seen to be the answers to the 2 questions .
1 - Will using E85 corrode anything in my late model vehicle?
No , Ethanol is not corrosive (Methanol highly) , it will how ever cause old tarnish to be released thus clogging filters .
2 - Will my injectors / fuel pump be able to flow enough to run E85 AFR's?
A lot of people have reported for some time now that just adding Ethanol (E85) to a stock vehicle worked with no side effects (except lower MPG) . As we know GM used 42# for Ethanol versus the 38# stock ones .

[gmh308]

Hi All,

We get a number of Emails asking what is needed to be able to run E85.
I've posted this in the GenIV section because this (for the moment) is targeted specifically to GenIV ECM's.

The most common questions are (which I don't know the answers to) -

1 - Will using E85 corrode anything in my late model vehicle?
2 - Will my injectors / fuel pump be able to flow enough to run E85 AFR's?

We recently added (yet to be released) some new calibrations for the E38 / E67 which will allow people to tell the ECM the vehicle is an E85 engine and be able to lock the E85 default percentage to whatever they want without using a $400 sensor or using the ECM's E85 prediction model which is quite complex and might not work on all vehicles because LOT's of calibrations need to be set up for it to work.

Any E85 experts here?
(Oh, this isn't a discussion about the pros/cons of E85 either )

Cheers,
Ross

Excellent. That will save a LOT of time! Thankyou.

[RetroAus]

I will be switching to E85 as soon as it is available in Brisbane...will be an interesting exersize I suspect.

Cheers
Kyle

[WHYTRYZ06]

what pcm does a 2001 z06 have..?

[gmh308]

So for E85:

B0178 = Yes
B0184 = Actual Sensor
B0185 = 85 (for example)
B0186 = Enabled ("actual" sensor fails test and uses 85% as a default).

There is a B0179 mentioned in the description. Where does this appear?

(plus a few tables need to be set for i.e. E85 spark correction factors etc).

Anyone with any comments on other areas?

[MN C5]

Was this in build 72? Nice feature, thanks...

[WHYTRYZ06]

when will it be available for gen 3 pcm's??

[gmh308]

when will it be available for gen 3 pcm's??

Did GenIII PCM's ever have flex fuel?