E85 question

[evan546]

He'd have to flash to stock, then flash his E30. 5-10 minutes process to do both flashes.

Flash to stock? Thats a negative. You can flash from a 93 tune straight to a E30 tune

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[higdominator]

XCT does take a little longer to swap tunes, what I did before was just start the reflash while I organized my pit "area" and got the car ready for tech. No biggie.

The Cobb is lightning fast to upload tunes to the device, datalog, flashing the car, and downloading data logs. You can DL a datalog, upload a new tune to the AP, and flash the car in the same time it takes to reflash an X4 tune.

 

[murphy]

Also you can run a 1/3 E85 2/3 93 mix as well. I run my tank down to less than 10 miles to empty, put in 5.15 gal E85 and top off with 93. Put in a little MM oil beforehand.... good to go!

 

[MAPerformance]

Also you can run a 1/3 E85 2/3 93 mix as well. I run my tank down to less than 10 miles to empty, put in 5.15 gal E85 and top off with 93. Put in a little MM oil beforehand.... good to go!

Only if you aren't running more than 21psi. The car runs out of fuel above E30 at low boost. You aren't getting anymore advantage with that extra 5% of ethanol. E30 is more than enough to achieve MBT on stock turbo, while still having proper fueling.

The way I setup my customers tunes if they want 91/93/E30 tunes is to use the on the fly map switching, which nobody else offers. So with one tune file, you can have 91, 93, E30, and Race gas tunes if you want. Switch maps by driving down the road and holding cruise control cancel and hit set + or set - to flip through the different slots. Your tach will point to which map slot you are in.

 

[DBiggles654]

Where I'm at we only have 91 and E85. Can I still achieve E30 without having 93?

 

[higdominator]

Where I'm at we only have 91 and E85. Can I still achieve E30 without having 93?

But of course!

 

[Slow89]

Also you can run a 1/3 E85 2/3 93 mix as well. I run my tank down to less than 10 miles to empty, put in 5.15 gal E85 and top off with 93. Put in a little MM oil beforehand.... good to go!

MM oil???

 

[MAPerformance]

Where I'm at we only have 91 and E85. Can I still achieve E30 without having 93?

Yes, E30 is only in reference to the ethanol content percentage. Using a lower octane fuel like 91 just means you will have less octane points than you would with 93.

Here is a good calculator.

http://www.intercepteft.com/calc.html

 

[nax]

Is there any benefit (performance increase) with E30 on an otherwise stock car?

 

[MAPerformance]

Is there any benefit (performance increase) with E30 on an otherwise stock car?

Yes, but I would recommend getting an intercooler to get the full benefit.

 

[higdominator]

Is there any benefit (performance increase) with E30 on an otherwise stock car?

Yep....11's.

 

[Slow89]

Yes, E30 is only in reference to the ethanol content percentage. Using a lower octane fuel like 91 just means you will have less octane points than you would with 93.

Here is a good calculator.

http://www.intercepteft.com/calc.html

That's a pretty sweet calculator..... 3 gallons of e85 and 7 of regular 91 get me at 95.2 octane and e33 or 2.5 gallons of e85 and 6.5 gallons of 91 get me to 30.8/e31 or 94.9

 

[higdominator]

That's a pretty sweet calculator..... 3 gallons of e85 and 7 of regular 91 get me at 95.2 octane and e33 or 2.5 gallons of e85 and 6.5 gallons of 91 get me to 30.8/e31 or 94.9

On an empty tank I now run 5- E85 and 9-91. This is a 96 OCT 30.4% blend.

1/2 tank- 2.5 & 4.5
1/4 tank- 1.25 & 2.25

This makes it really simple to fill up and never risk running out of space. I'm sure I could get it closer to full but I don't fill the tank up all the way because most of the time I'm at the track, lol.

Also make sure your 91/93 does NOT contain ethanol (10%) as this will throw off the measurements. My station has pure gas next to the E pumps so I don't get thrown off. It also lowers the octane rating of the mix

 

[Slow89]

On an empty tank I now run 5- E85 and 9-91. This is a 96 OCT 30.4% blend.

1/2 tank- 2.5 & 4.5
1/4 tank- 1.25 & 2.25

This makes it really simple to fill up and never risk running out of space. I'm sure I could get it closer to full but I don't fill the tank up all the way because most of the time I'm at the track, lol.

Also make sure your 91/93 does NOT contain ethanol (10%) as this will throw off the measurements. My station has pure gas next to the E pumps so I don't get thrown off. It also lowers the octane rating of the mix

i was about to say the calculator says you're at 36.8 or e37 but thats with 10% ethanol.... Correct me if im wrong but isnt all fuel in the nazi state of California all have 10%?

 

[higdominator]

I don't know, just glad I don't have to put up with their crap. I live in the great state of "drive a race car on the street if you want to".

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