E85 Mixed with Pump Gas on Flash Tunes

[Twist1]

I have tried to find information of guys doing this and there doesn't seem to be a whole lot of information out there on this concept.



How many of you are running say a 93 OCT file (APR, Euro, Etc.) and are splashing a couple gallons of E85 in with your 93? I know there is a huge e20 following here, but is there anyone doing this WITHOUT changing their tune to a race gas map?



What have you guys found to be the best ratio for running E85 with 93 octane on a Stage 1+ or 2 93 oct file?

 

[gn4rwhals]

Mixing E85 will raise the gas octane rating a small amount, its perfectly fine for an OTS tune as long as you only add 1-2 gallons to the tank.

You will not gain much (if any) performance from this however you could see reduction in cylinder corrections (due to the higher octane rating) which could lead to a cleaner timing curve during driving.

 

[Hoon]

https://www.golfmk7.com/forums/showthread.php?t=43354

 

[Coolrunning39]

3 gallons is a safe bet.

I’m tuned with UM.

 

[DSMconvert1]

I run 2 gallons e85 + 93 octane on Unitronic IS38, picked up 5-6 degrees of timing.

I use this to calculate rough ethanol percentage
http://www.georgebelton.com/E85Calculator.php

 

[Twist1]

Does anyone splash a couple gallons in with Apr 93 Oct tunes? I feel like it is a little throatier but could be psyche. I've noticed less deviance in timing retardation

 

[Cameron1292]

Does anyone splash a couple gallons in with Apr 93 Oct tunes? I feel like it is a little throatier but could be psyche. I've noticed less deviance in timing retardation

You can use it whenever you want. It will clean up bad gas, or help your current tune with timing and keeping the engine cool. I use it on my 93 tune when it's really hot, because my iat can get up in temp and cause corrections.

Sent from my ONEPLUS 5T using Tapatalk

 

[Bäsemödel]

Prepare to see your mpg drop like a stone

 

[Hans]

I run 2 gallons e85 + 93 octane on Unitronic IS38, picked up 5-6 degrees of timing.

How did you determine how much timing and you picked up? VCDS or obdeleven? Thanks

 

[Hoon]

Prepare to see your mpg drop like a stone

I'm not sure I'd consider 10% on E30 "dropping like a stone" but it's definitely a noticeable decrease.

 

[Jovian]

I occasionally will mix 3 gal E85 with 91. Performance is noticable for sure and knock/timing are all better. I typically drop 5mpg when running the mixture.

 

[DSMconvert1]

How did you determine how much timing and you picked up? VCDS or obdeleven? Thanks

I use a JB4 and did 3 logs Pre-e85 and post and compared. All logs done on the same day

 

[JOKERGTI18]

I added a gallon of E85 to my Stage 2 GTI to try to get rid of knock which it did, but it seems to be sputtering when i start to accelerate on the freeway. does anyone know what could be causing this?

 

[Daks]

Describe sputtering.

 

[JOKERGTI18]

Describe sputterier.

i guess its more like trying to bog out a little for a second before starting to accelerate. I'm not to sure how to explain it