Edge from DiscountPowerParts
#62
03-18-2007, 08:40 PM
#63
03-18-2007, 09:58 PM
Originally Posted by rusty70f100
At the risk of turning this into another ethanol thread, of which there are plenty in the alternative fuels forum:
Higher octane lets you adjust the engine for maximum performance if the current octane was inadequate for the engine design (compression ratio, combustion chamber dynamics, etc). For instance, you can add timing without pinging (much like the Edge probably does). Now if this lets you add usable timing to the engine at highway cruise, where the engine would have pinged with 87 octane, your mileage will go up. With E85, this would cause the mileage decrease to be less than expected were it based on only the BTU value.
E85 is lower in BTU's, but if you run both at stoichiometric, there are slightly more BTU's released with E85. Therefore you use more fuel, but you get more power. E85 also cools the intake charge more than gasoline, pulling more air into the cylinders as well.
So as you can see, high compression engines would be ideal for E85, but current engines have a lot to gain as well, especially if they were detuned from the factory for 87 octane.
Higher octane lets you adjust the engine for maximum performance if the current octane was inadequate for the engine design (compression ratio, combustion chamber dynamics, etc). For instance, you can add timing without pinging (much like the Edge probably does). Now if this lets you add usable timing to the engine at highway cruise, where the engine would have pinged with 87 octane, your mileage will go up. With E85, this would cause the mileage decrease to be less than expected were it based on only the BTU value.
E85 is lower in BTU's, but if you run both at stoichiometric, there are slightly more BTU's released with E85. Therefore you use more fuel, but you get more power. E85 also cools the intake charge more than gasoline, pulling more air into the cylinders as well.
So as you can see, high compression engines would be ideal for E85, but current engines have a lot to gain as well, especially if they were detuned from the factory for 87 octane.
I hope the Edge will work for you on E-85, its a great product you will be happy with. I'm interested in how far you can push the custom tune with E-85 and take advantage of the 105 octane, so if it works keep us posted.
#64
03-18-2007, 11:05 PM
Post Fiend
Originally Posted by gui88ford
very interesting....so, i could keep bumping the timing up and possibly gain more power than gas and end up with around the same mpg also....
i'll have to mess with it a lot when i get it this week and i'll post my findings...
i would also like to hear what edge has to say about it cause i'm sure they discussed it...
i'll have to mess with it a lot when i get it this week and i'll post my findings...
i would also like to hear what edge has to say about it cause i'm sure they discussed it...
You might run into diminishing returns bumping the timing too far. You could also get it over-advanced too, and that would reduce power and mileage, but I highly doubt an Edge tuner would allow you to go that far.
Last edited by rusty70f100; 03-18-2007 at 11:07 PM.
#65
03-19-2007, 07:22 AM
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Originally Posted by rusty70f100
Well even in stock form the FFV makes more power on E85 than it does on gas. I dont think you'll be able to tune it to where it gets the same mileage, but you should be able to minimize the reduction going to E85.
You might run into diminishing returns bumping the timing too far. You could also get it over-advanced too, and that would reduce power and mileage, but I highly doubt an Edge tuner would allow you to go that far.
You might run into diminishing returns bumping the timing too far. You could also get it over-advanced too, and that would reduce power and mileage, but I highly doubt an Edge tuner would allow you to go that far.
#66
03-19-2007, 10:17 PM
Post Fiend
#67
03-20-2007, 12:03 AM
#70
03-20-2007, 07:59 PM
#72
03-20-2007, 08:31 PM
#73
03-20-2007, 09:04 PM
#74
03-20-2007, 09:53 PM
#75
03-21-2007, 09:44 AM
Originally Posted by mbogosia
I haven't heard from them regarding the TPMS yet. However, I did see that my Edge was delivered today while I am out on the road. Sucks, but at least I can install it Wed evening when I get back.