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Custom Dodge Ram Performance Mods - Engine - 4.7 Liter V8 Discuss modifying your Dodge Ram with Performance Parts and Accessories!
Factory Spec: 4.7-liter V8 engine - 310 horsepower, 330 lb-ft of torque.


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  #1  
Old 12-14-2011, 10:26 AM
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Default anyone running E85 with a tuner?

wondering if anyone is running a 4.7 with a tuuner , on E85 , and what tuner , if its doing anything for them , or if its happening at all , thanks , guys n gals
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Old 12-14-2011, 03:32 PM
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I think E85 has a very high octane rating, so if you had a diablosport tuner you could probably tune in a lot of timing advance on premium fuel and get a huge boost in power. I still wouldn't run E85 anyway though, the stuff is plain nasty for the fuel system. I don't think it would be very effective with canned tunes unless maybe you were able to run the 93 tune on E85 or something like that. Keep in mind though E85 has less energy per volume than regular gasoline, so your starting off with less power to begin with, so even if you get a huge boost in power with E85 and a tuner, it'd probably be about the same end result as the performance tune on regular gas.
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Old 12-14-2011, 05:17 PM
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E85 is awful.
Some sourced info:

The energy of ethanol relative to gasoline
A. 76,000 = BTU of energy in a gallon of ethanol
B. 116,090 = BTU of energy in a gallon of gasoline
C. .655 = 2/3 = GGE of energy in a gallon of ethanol. A / B.
D. 1.53 = Gallons of ethanol with the energy of 1 gallon of gasoline. D = B / A.

But it does make your exhaust smell funny.
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Old 12-15-2011, 07:45 AM
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thanks guys, i didnt know it was that bad , although i def get less mileage per gallon, about 2-3 less per gallon, ill have to start running gas thru it again
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Old 12-15-2011, 08:00 AM
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Yeah it's hard on the rubber parts, it eat's them. And like you said poor mpg and less power. If you have ethanol free gas in your area that's what I'd use. We unfortunately don't have it around me. I ripped the flexfuel badge off my truck, and put a "93 octane only" sticker over the E85 fuel cap....I'm trying to forget that it's a flexfuel vehicle lol.
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Old 12-18-2011, 11:02 PM
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Your trucks 4.7 engine was designed to operate on flex fuel. At a 20% cost savings over regular fuel, you are saving more than the loss of the 2-3 MPG. Some areas I'm in have E85 a $1 less a gallon than 89 octane which greatly improves the savings. I am getting 14.8 MPG faithfully running E85. Did you know that in the winter months E85 is actually E70 due to blending at the petroleum terminals increasing the savings even more.
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Old 12-18-2011, 11:40 PM
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Quote:
Your trucks 4.7 engine was designed to operate on flex fuel. At a 20% cost savings over regular fuel, you are saving more than the loss of the 2-3 MPG. Some areas I'm in have E85 a $1 less a gallon than 89 octane which greatly improves the savings. I am getting 14.8 MPG faithfully running E85. Did you know that in the winter months E85 is actually E70 due to blending at the petroleum terminals increasing the savings even more.
That doesn't seem very good IMO, I get about 17-18 avg which is almost all city driving. There's one station that I've found by me that sells E85 and it is more expensive than the 93 across the street. Even so, if you work it out cost/mile, it doesn't pay off from what I've figured. I'd never put E85 in my truck, I've seen what ethanol does to my lawn equipment's fuel lines. It's bad enough that they mandate there be 10% ethanol in all fuel...
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Old 12-19-2011, 06:26 AM
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E85 is MORE expensive in South Carolina than 93.
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Old 12-19-2011, 07:23 AM
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I don't blame you for running 93 if its cheaper than E85 in FL and SC. I'm in the Midwest where the corn based ethanol is less expensive. We also are beginning to see E15 and E30 at some locations.
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Old 12-19-2011, 07:32 AM
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Quote:
Originally Posted by pjd View Post
I don't blame you for running 93 if its cheaper than E85 in FL and SC. I'm in the Midwest where the corn based ethanol is less expensive. We also are beginning to see E15 and E30 at some locations.
The 4.7 doesn't need or want better than 87. I'm paying $2.90/gal for 87. E85 is $3.29.
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