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Originally Posted by needaviper
I live in South Dakota and before you run e-85 make sure your fuel system is compatible. With the GM and Ford flex fuel vehicles I am not exactly sure what the specs are but I am pretty sure they run A complete stainless fuel system. It also burns very hot. A high performance car like the ones you are talking mostly about would benefit from it but do not run it in a stock motor unless it was made for e-85. Alot of people when the gas spiked up filled there cars with it and were shown at the garages getting the tank pumped, motors rebuilt and fuel pumps replaced. If your car does not take it , it will run like shit immediately and your check engine soon light will come on. But if you can run it it is $1.84/ gallon here and my 2 friends tahoes love it but the 15% MPG loss is true. My .02.
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This is great general information and anyone that isn't sure if their car can run E85 should investigate BEFORE they just go and add it to their tank.
Every FLEX FUEL Vehicle (FFV) either has a fuel sensor that detects the percentage of E85 and 93 or the newer versions are utilizing oxygen sensors to calculate the percentage to make the necessary changes in the ECM. This is the way the manufactureers allow the 1 million plus FFV cars on the road to easily pull up to the pump and choose E85 or 93.
When designing a fuel system for an aftermarket performance engine you need to make sure that ALL the components in the fuel system are alcohol compatible.
You don't have to incorporate the flex fuel sensor in order to run E85 in your high performance engine. The flex fuel sensor is installed to have the flexability of pouring in either 93 or E85 at anytime.
You need to tune and create a seperate E85 map. The same way you would create an optimized map for 116. Running an AEM you would still need to manually switch between 93 and E85 maps. Running a Motec allows you to change maps with a switch and then you don't have to carry a laptop to change between maps.
For many already built aftermarket applications, depending on the changes that need to be made, it might not be worth trying to make a compatible E85 system. Running race gas will suffice and be less of a hassle.
If you're starting a Turbo build from the beginning it's a good idea to look into how to make all your components compatible with E85. Taking care of it from the start will save you $$ and hassle by being able to fill up at the pump for $ 2.50 a gallon and get race gas performacne. Even if you have to run 30% more E85 you still come in around $ 3.25 a gallon, alot less than race gas.
It doesn't burn hotter it burns much COOLER and allows you to increase timing similar to race gas.
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