E15, would we have any benefits running this stuff at all?

[bluegoat06]

I'd imagine mpg would go down.
In theory gas stations would have an E15 label at the pump, http://www.epa.gov/otaq/regs/fuels/additive/e15/

So i guess a change in AFR cell to 13.8 would suffice with the subsequent correction in MAF/VE etc.

Are they any benefits at all running E15 ?

[carlrx7]

less power, less gasmileage, if its still under the 93 octane level, then we wont see any gains from higher octane.

loose loose.

-Carl

[ShadER]

my understanding is most pump gas contains up to 10% ethanol anyway, to me it just seems like a waste of time...unless detenation was an issue?

[murphinator]

ethanol is a fabulous fuel for anyone who likes making power , unfortunately the e15 blend will likely be similar to the e10 where they blend it with the lowest octane gasoline and still end up in the 91-93 octane range for e15 premium.

ethanol has good charge cooling properties , I just dont know if the 5% increase will amount to a piss hole in the snow compared to the e10. by the time you get to 25% ethanol you will see some benefits come into play - go check the threads in the LNF section (I4, I5, I6 section) of the forum where the cobalt/hhr/solstice guys have been blending with real impressive results.

I have done some tuning on an L67 powered rock crawler and we run approx. e30 in it by blending e85 he gets at the closest pump 2 states away and are able to pulley down more than it could on pump premium safely and added timing to boot ! once we gain some headroom on his duty cycles with some bigger injectors we will increase the e% and pulley down further


summer blend e85 can make more power than 116 octane race gas - proven many times, but these low percentage blends turn a lot of people off to ethanol fuels unfortunately and I think that is all planned by the big oil companies , lots of misinformation out there since it doesnt come out of the ground in kuwait....

I wish we would just act like a free country and just go to blender pumps so if you dont care for ethanol you choose e0 , if you love ethanol you can choose e85 or e98 , if you want the benefits of ethanol but dont have the injectors and pump in place to run 85% or higher you could choose 30,40, 50 % etc..

[bluegoat06]

Thanks everybody.

[blkscooby]

I used to run 2.5 gal of E85 with 14 gal of 91 in my 08 Subaru STI when it was fiarly stock. This gave me around 94 oct and I had the injector head room. It was much easier to avoid knock. Then I increased the injector size and went to a larger turbo and did full E85. It was very nice to tune with.

Now I am tuning for E85 in my G8 since we have large enough injectors for non FI/ non cam applications.

But pump E15 will be no better than current E10 as it will stay 91 oct but further reduce MPG.