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As a data point -- we switched our ChumpCar 924S over to E85.
It's ~10:1 compression ratio.
We never dyno'd it -- but our butt dyne says we're faster and have more grunt.
We burn about 15% more fuel -- which is less than you would expect since our conversion was simply to use Turbo injectors which flow about 27% more -- which is about the right flow rate for E85 relative to pump gas.
Why do we only burn 15% more -- I believe it is because of the extra power, we are WOT less of the time on the track.
This is a non-scientific study. But where we could run about 2hours on a full tank of gas -- we now can only run 1hr 45min. Had we burned through 27% more fuel -- we'd be at the ~1.5hr mark.
Cheers,
Mike
Flat Out Racing #85
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2015 Panamera Hybrid, 2008 Cayenne Twin Turbo
2001 996 GT2
1999 Spec Boxster, 1996 993 Cabriolet
1992 964 Cabirolet, 1975 911 RSR Replica Race Car
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