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Melbourne135 Melbourne135 is offline
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Default E85 question - 08-23-2015, 05:45 PM

I searched but didn't see an answer for this... apologies if it has been asked.

I have a 2013 N55 that I want to be able to run 100% E85 on. I have been looking at the replacement stage 2 or stage 3 LPFP from Fuelit. On the site they say that they are E85 certified. Will this allow me to run 100% E85 or are there are things that will need to be done as well?

Many thanks
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Default 08-23-2015, 05:49 PM

Thats an F series car? Its not running all E85. We have no back end flash available, and thats pretty much required for more than E35-40.


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Melbourne135 Melbourne135 is offline
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Default 08-23-2015, 05:56 PM

E- Series 2013 Vert
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Default 08-23-2015, 06:51 PM

At this time a 2013 can not be flashed via the OBD II port. The ability to flash the car is a necessity unless you have other means.

At this time I would recommend running E30 or so and calling it a day.



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Melbourne135 Melbourne135 is offline
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Default 08-23-2015, 11:30 PM

well that sucks... hopefully a flash will be available soon.
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Default 08-24-2015, 11:41 AM

I'm running e40 right now with no issues. After this tank I'll go to e50. Some cars act differently than others. I would start off with an e30 mix and go up from there. Give it about 8-10 miles before you call it good though because you have the flush the old fuel out of the fuel system.


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Default 08-24-2015, 01:26 PM

Now how can you run E40 with all those mods and my HPFP is done with E34?


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Default 08-24-2015, 01:57 PM

Quote:
Originally Posted by Mike_L
Now how can you run E40 with all those mods and my HPFP is done with E34?
im not quite sure, i also have the stg 2 LPFP just forgot to put it in my sig. its a little stronger than e40 actually because i tested the fuel it came out as e90. I just did the turbo timing trick and im still not having any issues with it.


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Default 08-24-2015, 04:04 PM

Quote:
Originally Posted by obriennathaniel
im not quite sure, i also have the stg 2 LPFP just forgot to put it in my sig. its a little stronger than e40 actually because i tested the fuel it came out as e90. I just did the turbo timing trick and im still not having any issues with it.
What's the turbo timing trick?
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Default 08-24-2015, 04:55 PM

Quote:
Originally Posted by sc67065
What's the turbo timing trick?
getting a 1.2k ohm resistor , put one side to ground and the other side to the green wire on your tmap sensor. it Raises your IAT's 30-40 degrees, lowers timing to increase boost.


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Default 08-24-2015, 09:11 PM

Quote:
Originally Posted by obriennathaniel
getting a 1.2k ohm resistor , put one side to ground and the other side to the green wire on your tmap sensor. it Raises your IAT's 30-40 degrees, lowers timing to increase boost.
Hm, is this possible for ewg n55?

Could you post a link of a guide?
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Default 08-25-2015, 12:22 AM

Quote:
Originally Posted by sc67065
Hm, is this possible for ewg n55?

Could you post a link of a guide?
http://www.n54tech.com/forums/showthread.php?t=29249

sorry for the delay, I dont get emails from replies on this forum for some reason. It should work just fine, I dont see why it wouldnt.


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Default 08-25-2015, 01:04 AM

Quote:
Originally Posted by obriennathaniel
getting a 1.2k ohm resistor , put one side to ground and the other side to the green wire on your tmap sensor. it Raises your IAT's 30-40 degrees, lowers timing to increase boost.
This resistor does not increase boost. It increases IAT by 40ish degrees. This will indeed cause the DME to pull ign advance. When running stage2 turbo running adv over 8 does not give extra power on our cars. Hence it lowers timing a bit to not stress the engine too much. Best is still to have the DME flashed with lower adv for a specific load. I have been working on it with my tuner for some time but he still does not get it right.


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Default 08-25-2015, 01:27 AM

correct, i guess i could have worded that a little different. It allows you to adjust your timing so you could possibly add more boost, considering all the variables are in the correct range.


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Default 08-25-2015, 06:00 PM

Quote:
Originally Posted by obriennathaniel
correct, i guess i could have worded that a little different. It allows you to adjust your timing so you could possibly add more boost, considering all the variables are in the correct range.
I see. The reason I thought this might not work on EWG is because we don't use power and ground wires.

Would I see any benefit from the turbo timing trick if I'm stock turbo on E40?

Sorry, I'm a noob :p
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Default 08-25-2015, 09:30 PM

Quote:
Originally Posted by sc67065
I see. The reason I thought this might not work on EWG is because we don't use power and ground wires.

Would I see any benefit from the turbo timing trick if I'm stock turbo on E40?

Sorry, I'm a noob :p
No this timing trick is only for stage2 turbo. Again the benefit is not more power but added safety


F21 M140i - 100-200: 6.95
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Default 08-27-2015, 10:22 AM

I run my 2011 N55 E-series on E-85 straight out of the pump, which is actually E70 (this time I'm talking about 70% ethanol content). I understand that there is no BEF for the N55 E-series, nor would it do any good without the turbo upgrade. I've asked the question before, and I'm still not clear on the issue, but what is the issue that requires the BEF? Would you run too lean without modifying the injector trims? You're talking timing in this thread. The JB4 will adjust timing by lying to the DME about the IAT, is this not sufficient?


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Default 08-27-2015, 11:08 AM

Quote:
Originally Posted by tboudre
I run my 2011 N55 E-series on E-85 straight out of the pump, which is actually E70 (this time I'm talking about 70% ethanol content). I understand that there is no BEF for the N55 E-series, nor would it do any good without the turbo upgrade. I've asked the question before, and I'm still not clear on the issue, but what is the issue that requires the BEF? Would you run too lean without modifying the injector trims? You're talking timing in this thread. The JB4 will adjust timing by lying to the DME about the IAT, is this not sufficient?
I think you are confusing your E series with the F series. Unless you have something else besides a 2011. E series can do a BEF. The benefit being that you can alter the different tables like fuel, timing, afr. But there is no real reason to get one for a stock turbo. Also, there is no reason to run higher than E60 fuel, unless you like the lower mpg.
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Default 08-28-2015, 12:54 PM

Quote:
Originally Posted by tboudre
I run my 2011 N55 E-series on E-85 straight out of the pump, which is actually E70 (this time I'm talking about 70% ethanol content). I understand that there is no BEF for the N55 E-series, nor would it do any good without the turbo upgrade. I've asked the question before, and I'm still not clear on the issue, but what is the issue that requires the BEF? Would you run too lean without modifying the injector trims? You're talking timing in this thread. The JB4 will adjust timing by lying to the DME about the IAT, is this not sufficient?
So, you run a tank with only e85?


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Default 08-31-2015, 09:05 AM

Quote:
Originally Posted by jgoens
So, you run a tank with only e85?
Being that my e85 station is about 60 miles away, and I only get there every 2-4 weeks, my typical procedure is to fill up E-85 (which at this station is really E70), and fill four 5-gallon jugs while I'm there. Ideally, half way through the tank, I'll top off with 93 octane E10, and when that gets low add one usually or sometimes two of the 5-gallon jugs, then top off with the 93 octane E10. I don't do a lot of driving during the week, and sometimes not so much on the weekend either, so a trip can last a couple months. But Weehe is right, running E70 sure does burn through some fuel. I drive mostly around town and can run a tank down in 150 miles. I stopped yesterday for a refill, and E-85 was $1.789/gallon and 93 octane E10 was $2.389/gallon. So, at 75% of the cost, for around town getting 150 out of 200 miles, 75% of the miles of premium, it's a wash $$$ wise. Not too long ago, E-85 was $2.159 and premium was in the $3.599 range, if I remember right. That makes it a little more economical. But yes, it is possible to run E70, but after about E40, you're looking at sharply diminishing returns, power wise, and breaking even money wise.


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