Quote:
Originally Posted by compdoc777
Don't trust the information. E85 you only need to tune for the fuel. Does not take high compression. What do you think the turbo does? The turbo compresses the intake charge so turbo applications get more power.
Example: On my Supercharged RSX Type S we ran 301 whp with regular fuel. Then tuned with E85 and ran 320 whp. Now the compression on the RSX is 11:1 so that would be higher compression, but most cars today run a higher compression ratio.
Notably one will either need a canned E85 tune or a programmable ECU like I have on the RSX to do this, but any OBDII car can be tuned to run E85.
The gas mileage does go down, but then again you are not paying more for gas are you.
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Despite this, the ethanol gives off a lower amount of energy at the current/same compression. The turbo is designed to create the power we bought it for, with gasoline. It does not currently create this same power with ethanol.
"The gas mileage does go down, but then again you are not paying more for gas are you?" - I pay maybe .25 more per gallon for pure. This comes to roughly $2.50 more per fill up(fill up costs $55.00). So If I use the ethanol (E10) I will fill up for $52.50, pure $55.00. If you are losing 5mpg with E10 and traveling an hour like I do, then the result I had was my fuel mileage was almost cut in half. This means that with pure I spent $55.00 over a 2.5 day period, with E10 I spent $105.00. See my point? These are my real world numbers using the same daily route at the same speed over a 50minute period.
Bottomline: whether a tune would help or not, our production skys are not designed to run on ethanol, resulting in lower MPG and 34% drop in power at current compression settings.