it won't take much to get hybrids running on E85, check out the results on a stock 2003 Prius:
http://72.14.207.104/search?q=cache:...edproject.org/
Drivability during the road tests also highlighted the difference in cold driving performance between the two fuels. When the engine was powered using ethanol it felt sluggish and the idle quality was rougher. After a time of between 9 to 15 minutes, the ethanol performance improved and there was no noticeable difference in drivability between the two fuels.
While using E-85, the check engine light came on. Upon inspection this produced a code indicating a lean condition was detected. During this time, it was noted that the check engine light for the lean code would come on between 140-160 miles since clearing the code.
The oxygen sensor output and the short-term fuel trim all indicated that the Air/Fuel ratio to be stoichiometric, and that the fuel control module was maintaining the correct amount of fuel required. What was setting off the check engine light was that the system monitors the change in the base fuel map, which is indicated by the long-term fuel trim, and if this change is outside of the set boundaries for an extended period of time, then a code would be set to indicate that the fuel system is making greater adjustments to the fuel quantity to maintain the correct air/fuel mixture than would be necessary under normal circumstances. The use of ethanol caused the fuel system to adapt the long-term fuel trim by an increase of 32.81%. This supports the lower average fuel economy of ethanol in the results.
Measured performance:
Gasoline
64bhp @4500rpm
80lb-ft @4200rpm
E-85
77bhp @4700rpm
106lb-ft @4250rpm