Stage 1 E85 to Stage 2

[GRUMPY-S4]

Will my car be harmed if I went Stage 2 and logged without a HPFP upgrade? Is it 100% validated that every car needs the HPFP upgrade for stage 2 E85?

[pdqgp]

I think straight E85 is would throw a lean code for sure. No logs here but from what I've seen, read and know it would be.

I run a Stage 2 with 3 gals of E85 mixed with 93 with Zero issues. Car responded very well. Saw it really kick in after a full tank and then upon my second fill up with this mix.

[jokingjimmy]

I think straight E85 is would throw a lean code for sure. No logs here but from what I've seen, read and know it would be.

I run a Stage 2 with 3 gals of E85 mixed with 93 with Zero issues. Car responded very well. Saw it really kick in after a full tank and then upon my second fill up with this mix.

With stock fuel pump I'm assuming?

[pdqgp]

With stock fuel pump I'm assuming?

Correct. On my last car (MS3) I did the HPFP and E85, ect. and enjoyed it but I'm not sure I'll put forth all that on the S4 as it's a new platform for me and I want to see how longevity and reliability play out with others first.

I'm quite confident and comfortable with the mix so far. Based on my first summer with Stage 2 and seeing it pull a little timing, I really just wanted to give it enough to perhaps get that timing back yet not stress the rest of the system too much if at all. I know it can push the fuel needed as really I'm not mixing much. YMMV based on what you wish to do with your car.

[jokingjimmy]

Yah summer is brutal here as well. If I can mix in a couple gallons each fillup to help keep the timing in some sane range on the 100°/95% humidity days, I'm going to try it lol.

[cspcrx]

I'm in Phoenix talk about brutal summers. We have 91 and E85 here at the pumps. Last summer I started running 3-4 gal of E85 with every 91 fill up. Car is stock but I could tell a difference within a few days and even more after a few tanks mixed like this. I have had zero codes or issues.

As you I am going to go Stage 2, the next sale that happens, and want to run the 93 octane tune all of the time. My only option is to run a mix of E85. I have heard the tune will adjust so if its not spot on you wont kill the motor.

[infinkc]

I would think of it as a backup parachute, would you go sky diving without one?

[4RCFED]

For full E85 stage 2 you need the upgraded pump. Solo motorsports sells their kit with it included.

[mehware]

I have EPL stage 1 e85 and epl tcu. I don't need HPFP but irrc Tony said it's required for stage 2. I might get one because I don't know how to save money... plus it preps me for stage 2 upgrade!

Matthew

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[BlownOne]

I would think of it as a backup parachute, would you go sky diving without one?

Touché Kris!

I have EPL stage 1 e85 and epl tcu. I don't need HPFP but irrc Tony said it's required for stage 2. I might get one because I don't know how to save money... plus it preps me for stage 2 upgrade!

Matthew
Sent from my SAMSUNG-SM-G925A using Tapatalk

Hahahaha me and you have the same problem!! I should drop in a modders anonymous metting someday...

If you want to run pure corn, get the fuel pump upgrade. If you want to just add a few gallons of E to gas, you don't need it grumpy.

Will

[theswoleguy]

Im on stage one e85, I just got a CEL this morning for low rail pressure. Sadly i think i will be one of the ones needing a HPFP. :/

Also an evap code (failed to tighten my gas cap LOLOL) the woman is giving me so much hell for this.

[Tony@EPL]

Im on stage one e85, I just got a CEL this morning for low rail pressure. Sadly i think i will be one of the ones needing a HPFP. :/

Also an evap code (failed to tighten my gas cap LOLOL) the woman is giving me so much hell for this.

Ill send you a few things to log. Any car that is running the 551F file I havent seen a need for. Interestingly... did the light come on during extended cruising after a pull? If yes, we my other thread.

[UberBrute]

Ill send you a few things to log. Any car that is running the 551F file I havent seen a need for. Interestingly... did the light come on during extended cruising after a pull? If yes, we my other thread.

If we do need a pump, any chance you would know if the flex fuel pump from the a4 would work?

[AudBoost]

If we do need a pump, any chance you would know if the flex fuel pump from the a4 would work?

You don't need the entire pump just the piston.

http://sillyrabbitmotorsport.com/eng...t-hpfp-upgrade

http://autotech.com/index.php/autote...-2-5t-fsi.html

[mehware]

@Tony my file is 551F correct? No CEL here.

Matthew

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[theswoleguy]

Ill send you a few things to log. Any car that is running the 551F file I havent seen a need for. Interestingly... did the light come on during extended cruising after a pull? If yes, we my other thread.

it was just a casual cruise to work this morning.

[GRUMPY-S4]

Ill send you a few things to log. Any car that is running the 551F file I havent seen a need for. Interestingly... did the light come on during extended cruising after a pull? If yes, we my other thread.

Tony... So based on ECU codes there are variances in the HPFP output?