Yes pay attention to what you are putting as there are many 93 oct pumps with 10% E added so get the pure gas stuff or add the 10% to your calc .. Keeping track is just book work after that and paying attention while running the E tunes so you dont get someplace without a E85 pump and you not having a choice but to swap maps. But if you can do it the in car gauge is the best option imho for instant readings of what you are putting in the car..
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"E" Fuel Tunes Questions
- Thread starter Kip2MyLou
- Start date
Thank you for the comments, look forward to work with you when you are ready!
It's fairly simple, I mix on every fill up. I run the car down to when the gas light comes on then I do 3 gallons E85, and fill the rest up with 93.
I use this calculator: http://www.intercepteft.com/calc.html
It's fairly simple, I mix on every fill up. I run the car down to when the gas light comes on then I do 3 gallons E85, and fill the rest up with 93.
I use this calculator: http://www.intercepteft.com/calc.html
OP
Thread Starter
#23
Thread Starter
#23
Thanks guys for all the help. Sad thing is I don't really have a close E85 station :\ I'm still going to look into it though.
Another quick question, why is E30 the most common tune? I keep seeing places do E30 tunes, but I'm hearing there's also E30, E40, etc. So you would need a different tune for each one of those "E" tunes?
Another quick question, why is E30 the most common tune? I keep seeing places do E30 tunes, but I'm hearing there's also E30, E40, etc. So you would need a different tune for each one of those "E" tunes?
OP
Thread Starter
#24
Thread Starter
#24
Some of us have installed a ethanol percentage gauge and sensor. This is really not necessary, however.
This is what I did to get started using e85:
1. I purchased the Holley "test tube", followed the directions and tested out the e85 I was planning on using. It turns out that Propel (the e85 I use) was actually e85. This is good to know because it affects your inputs to step 2. Follow the directions, add water, then e85, and shake the test tube. Then read out the percentage of ethanol.
2. I have an Android phone, so I downloaded two programs:
a. e85 mix calculator - This takes care of the math on how many gallons of 91 octane gas and how many gallons of e85 I need to use.
b. Propel app. This lets me know where all the Propel (e85) gas stations are located at.
In my case, the Arco gas and the Propel gas I use are both in Fullerton, CA, and are only 5 blocks apart.
3. You need to have a good idea how much fuel is in your tank. The way I do this is to fill up with 91 octane gas when the miles until empty says 60 or 40 or 30 or 20, and keep track of the number of gallons I needed to add to fill the tank. Subtract this from 12.4 ( number of gallons in a FiST), and you will know how many gallons you have in your tank.
Example: I filled up my ST when I had 28 miles until empty. I used 11.07 gallons, which means I had 12.4 - 11.1 gallon = 1.3 gallons in the tank. 40 Miles until empty usually means I have 2 gallons of gas in the tank.
Then you plug in the numbers into the e85 mix calculator and it tells you how many gallons of gas and how many gallons of e85 to put into your tank.
So, if I have 1 gallon of fuel in the tank, and its 91 octane, this means its 10% ethanol. Propel e85 has 85% ethanol, and my desired E% is 40.
According to the app, I put 6.84 gallons of Arco and 4.56 gallons of e85.
Then the ethanol percentage gauge confirms that I have e40.
The only thing that changes the second fill up is the E% in the tank. It goes up from e10 to e40.
Get the e85 mix calculator program and play with it, and it will become very clear what and how you use it.
https://play.google.com/store/apps/details?id=com.kennethnissel.e85&hl=en
This is what I did to get started using e85:
1. I purchased the Holley "test tube", followed the directions and tested out the e85 I was planning on using. It turns out that Propel (the e85 I use) was actually e85. This is good to know because it affects your inputs to step 2. Follow the directions, add water, then e85, and shake the test tube. Then read out the percentage of ethanol.
2. I have an Android phone, so I downloaded two programs:
a. e85 mix calculator - This takes care of the math on how many gallons of 91 octane gas and how many gallons of e85 I need to use.
b. Propel app. This lets me know where all the Propel (e85) gas stations are located at.
In my case, the Arco gas and the Propel gas I use are both in Fullerton, CA, and are only 5 blocks apart.
3. You need to have a good idea how much fuel is in your tank. The way I do this is to fill up with 91 octane gas when the miles until empty says 60 or 40 or 30 or 20, and keep track of the number of gallons I needed to add to fill the tank. Subtract this from 12.4 ( number of gallons in a FiST), and you will know how many gallons you have in your tank.
Example: I filled up my ST when I had 28 miles until empty. I used 11.07 gallons, which means I had 12.4 - 11.1 gallon = 1.3 gallons in the tank. 40 Miles until empty usually means I have 2 gallons of gas in the tank.
Then you plug in the numbers into the e85 mix calculator and it tells you how many gallons of gas and how many gallons of e85 to put into your tank.
So, if I have 1 gallon of fuel in the tank, and its 91 octane, this means its 10% ethanol. Propel e85 has 85% ethanol, and my desired E% is 40.
According to the app, I put 6.84 gallons of Arco and 4.56 gallons of e85.
Then the ethanol percentage gauge confirms that I have e40.
The only thing that changes the second fill up is the E% in the tank. It goes up from e10 to e40.
Get the e85 mix calculator program and play with it, and it will become very clear what and how you use it.
https://play.google.com/store/apps/details?id=com.kennethnissel.e85&hl=en
To me it seems to be more issue than its worth. The only gas stations near me that have E85 are sheetz and my experience with their 93 octane hasn't been good, negative corrections all day long for no reason. I switched to shell (and occasionally BP) and now the negative corrections are very rare. I guess I could run E85 from sheetz and 93 from shell, but now I have to take a can to sheetz and fill it up then mix it at shell when I fill up the rest of the tank. So for me a 93 tune will be for daily driving and E40 tune for race day.
This is probably how I will do it. How far off can the mixture be before you start having problems?
Both stations are close to my work, the sheets is maybe 2 miles and the shell is about 3, but in the opposite direction and there is no direct route from one to the other. It wouldn't be too hard to get a 5gal gas can and put 4.5 gal of E85 in it and drive over to the shell, dump the e85 in first then fill up the rest of the way with 93. I just downloaded that app on my phone and it seems to make it pretty easy on how much to put in it. I just see myself getting lazy with it and running a 93 tune most of the time and just do the E40 on occasion.
E85 stations seem to be few and far between here. I have a few gas stations that have race gas that aren't too far, but that shit is expensive...I may get a tune for 100 octane, but I doubt that I would use it very often.
Both stations are close to my work, the sheets is maybe 2 miles and the shell is about 3, but in the opposite direction and there is no direct route from one to the other. It wouldn't be too hard to get a 5gal gas can and put 4.5 gal of E85 in it and drive over to the shell, dump the e85 in first then fill up the rest of the way with 93. I just downloaded that app on my phone and it seems to make it pretty easy on how much to put in it. I just see myself getting lazy with it and running a 93 tune most of the time and just do the E40 on occasion.
E85 stations seem to be few and far between here. I have a few gas stations that have race gas that aren't too far, but that shit is expensive...I may get a tune for 100 octane, but I doubt that I would use it very often.
[MENTION=2360]GateCityRadio[/MENTION] I can't give you an exact answer, but if you're supposed to be e30, id say your safe up to e40. Anything beyond would be highly questionable. As I always do, I suggest you speak with your tuner to determine how far off your ethanol can be before its detrimental.
I didn't expect the process to work quite as quickly as it did, and Adam sent me an E30 file earlier today. I asked him the question on how vital was the E30 mix, and he said the tune was fine up to E40. I took that to mean not to run the file below E30 as well, and I ordered the summit E85 test tube kit to see what my local E85 dealer is actually supplying.
I will add 4 gallons of "good" E85 assuming my local station is selling quality fuel, and then I will mix with 7 gallons of 93 octane Chevron. This should give me a little cushion on the ethanol content on either side, so that I don't go over or under what Adam suggest.
I will add 4 gallons of "good" E85 assuming my local station is selling quality fuel, and then I will mix with 7 gallons of 93 octane Chevron. This should give me a little cushion on the ethanol content on either side, so that I don't go over or under what Adam suggest.
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