Is anyone using E85 to raise their octane level mixed with pump gas? The highest octane pump gas I can get in SD is 91 and I need at least 93 for my new TT chip. I have a file created in Excel that uses the "goal seek" function to calculate what my blend needs to be based on a desired octane outcome. So if I am blending into 91 I just punch that in and the formula spits out my % ratio of 91 to E85. The same works for 87 octane pump gas. Its quick and easy, and best of all accurate. I know there are other alternatives like race gas and the like, but blending with E85 is much more practical in my situation.
E85 Cocktail
- Thread starter mtbraun
- Start date
Stock injectors, for now.
I ran the following numbers and thought this was interesting:
Using 89 pump gas and E85 would require an 73/27 mix, respectively. Using 89 pump gas and race gas (assuming 115 octane) would require an 85/15 mix. Of course using 91 pump gas would decrease the mix ratio in both scenarios.
I'll check with Eric on the E85 thing but may just play it safe and mix with race gas.
Using 89 pump gas and E85 would require an 73/27 mix, respectively. Using 89 pump gas and race gas (assuming 115 octane) would require an 85/15 mix. Of course using 91 pump gas would decrease the mix ratio in both scenarios.
I'll check with Eric on the E85 thing but may just play it safe and mix with race gas.
Adam Connell
Monster Truckin since 87'
- Joined
- Oct 1, 2006
E85 isn't corrosive... Quit posting that dumb shit myth trash. I've run a tank of E85 a week for the past year through my car and it's happier than ever... Walbro is even still happy. I could only be happier if it got better mileage...
+1, I cant believe how much bad information there is out there. Myself and the rest of the Turbo Farm West crew have been running E85 in multiple different set ups since it was first available before there was an E85 section and even before Eric burned chips for us. We love it. Never any problems caused specificly from the E85.
The past set up I ran was with a hotwired single parts store replacement pump, 38# injectors with 93 gas chip, stock motor with a THDP and a PowerStroke front mount. I mixed 50/50 89oct/E85 and ran the car in the 20# of boost area for quite some time. Zero knock. Stock fuel lines, stock paper filter. ZERO PROBLEMS!
If you have it available, use it. I wouldnt run it on stock injectors at all! At least get a set of cheap injectors 38's or 42's and mix away. Dont expect to just crank the boost up because you will blow it up. Until you go with a decent E85 set up, even 60# injectors with an E85 chip, mixing is only to help and a you'll need to keep a good eye on the tune. The added mix is only to help, and I'll repeat, ONLY TO HELP!!!!!
Sixxshot87
Member
- Joined
- Sep 3, 2008
Or you could just add a gallon of toluene and not have to deal with issues with Air/fuel ratio or the alcohol swelling up petroleum seals topics. Gnttype.org has more info under the tech/fuel section. Toluene can be boughten at ace hardware for about 15 a gallon and all the octane info and calculations are also on gnttpe.org. Don't make this harder than it needs to be
PLAINWHITE T
Tree peddler
- Joined
- Jan 11, 2010
....or when they smell your exhaust!
gnloyalty8777
Member
- Joined
- Nov 26, 2011
Heck, the only thing confusing about running E85 is the look on peoples faces when they see you pumping it into your 25 year old car!
I like to act as if i'd made a huge mistake when i got that look.
Now that's funny! I'd like to witness that!
Austin had nothing but problems on the Power Tour last year, was that E85 related ?
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