Quote from: bpd1151 on December 13, 2018, 09:17:02 AM
To this day I still am left wondering why so many rave about E85 being "cheap".
It gets worse mileage than pump gas, and takes more volume to achieve the same engine power as pump gas.
I really question the actual tangible (term used loosely....) "savings".
Never been a fan. Likely never will.
Alas I digress.
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There are many factors that contribute to people loving E85. Certain geographic regions have different fuel as we all know. For instance here in AZ we do not have 93 octane. We only have 91 octane. It is also extremely hot (115+). My IAT's during the summer get into the high 170's. Couple that with only 91 octane there is no way around having a tune that makes me happy without getting pre-ignition.
On a E30 tune under the same conditions with more boost I have zero knock and I am happy. My car tune only almost cracked 400AWHP in 100 degree heat with only a AJPTurbo E30 tune, K&N drop in, and 542 plugs. It also goes into mid 12's (50's) at full weight like a bracket car. I bet with more seat time, I can get it into the 12.30 range, we will see in January.
With E85:
The Octane is higher, cooling properties are better, it has the ability to make more power than pump gas here. All of my boosted cars have run on the E(whatever) because they stay cooler and they run better. I also don't daily my SHO, so the decrease in fuel mileage is a non factor for me. Also look at the math. 19 gallons at $3.33 a gallon (91) is $63.65. 10 gallons at $3.33 a gallon is $33.30 + 9 gallons of E50 (pump E85 for me) at $2.59 a gallon $23.30 = $56.61 $56.61/63.65=88%. That is 12 percent cheaper. My SHO on 91 gets right a 400 miles per tank usually 21 mpg. On E30 it gets 340 ish at 17.8 ish mpg. So 17.8/21= 84.7% a 16 percent drop in mileage. If I can get away with running straight E50 it will only cost me 19 gallons at $2.59 = $49.21 making my personal use of it even more justified. So I am literally breaking even with price per mileage. My car runs harder, does not have any knock, and I have peace of mind. Plus testing pump E85 is super easy.
I will upgrade the HPFP one of these days. I don't want have to worry about a meth system that is solely used as another fuel source. I would only install one on my car to clean the valves. The more I see and hear about certain meth tunes, the more I realize for my application I went with the right choice. Plus my car makes as much HP and TQ in crap DA and heat that most Meth cars do......at lower boost and lower RPM.
For me there is no other choice.
The picture I added was my hot E30 tune on a 360 mile drive to CA averaging 82 mph.