Thread: E85 fuel FAQ
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Old 07-24-2005, 03:57 PM   #11
hotrod
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Member#: 14141
Join Date: Jan 2002
Location: 13.239@102.85 @ 5800 ft on 13T
Vehicle:
2002 Impreza WRX
e85forum.net

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Yes with a 50/50 mix you would need to add about 10% -12% more fuel to get the same effective mixture as gasoline only.

The higher octane of the E85 might allow you to get away with the same tune but you would be leaner than your tune on gas. Only way to know would be to work up in small increments and see how the car likes it.

Even a 20%-30% mix of E85 makes a noticable difference.

Larry
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