[Nataphen]

FF sensors have their issues too as they can't account for moisture in the system. The car adjusts quickly enough using the O2 sensors that your fueling is corrected almost immediately. Either way works, it's just that you don't have to splice in a harness doing it the other way. AED showed a video of the AFR adjusting from a switch to E85 on the dyno, and it took less than 4 minutes of part throttle driving to fully adjust without using a FF sensor.

http://youtu.be/hH-QdHqFhN4

[bobshannon22]

Can you go in depth about the pros and cons with e85 for the 16ss specially. In my case it is a daily. I will be getting a tune also. The flex full sensor was all that was needed? Can you link the part?

[SS 1LE]

Originally Posted by bobshannon22

Can you go in depth about the pros and cons with e85 for the 16ss specially. In my case it is a daily. I will be getting a tune also. The flex full sensor was all that was needed? Can you link the part?

If it's your daily, you won't want E85...it will cut your mileage down by about 50%.

[parish8]

The biggest pro is for boosted cars. It is high octane fuel for a low price and you can get it at many places.

The con is you use ~30% more of it.

I would like to know a lot more about our fuel system and what options we have to increase the output. How much hp can it handle stock? How much running e85? What runs out first the high pressure pump or the transfer pump. What upgrades are available and how much hp can then be supported.

[pinoyscorpion951]

I spoke with Troy Gleason at Cunningham Motorsports about this and they are still trying to work out the kinks in this conversion. It's not available to the public yet. There's a video of their 6th gen shop car with just an E85 conversion and tune doing a roll race with a modded evo and modded mustang gt and it just left both of them in the dust. The chase car was that was filming was a twin turbo Camaro that was able to keep up but man that 6th gen was fast.

[Nataphen]

Originally Posted by pinoyscorpion951

I spoke with Troy Gleason at Cunningham Motorsports about this and they are still trying to work out the kinks in this conversion. It's not available to the public yet. There's a video of their 6th gen shop car with just an E85 conversion and tune doing a roll race with a modded evo and modded mustang gt and it just left both of them in the dust. The chase car was that was filming was a twin turbo Camaro that was able to keep up but man that 6th gen was fast.

The way that 6G Camaro walks that bolt-on 5.0 is impressive! E85, tune, and A8 make for a potent combo.

[Nataphen]

Originally Posted by SS 1LE

If it's your daily, you won't want E85...it will cut your mileage down by about 50%.

Only because you want to keep your foot in it more because of the extra power, LOL. A true 85% E85 will use 33% more fuel than a true 0% ethanol content gasoline if you drive the car exactly the same way on both fuels. The problem with that equation is that almost all gas is at least E10 now, and some is as high as E20. If you go from E10 to E85, you'll use 30% more fuel. E20 to E85 will use 27% more fuel.

The sweet spot for a naturally aspirated car is to find a station that sells E70. You'll get all the performance of E85 with minimal impact on mileage. E70 will only use 20%-24% more fuel than E10-E20. Hope this is helpful to someone.

[Eric SS]

Originally Posted by Nataphen

Only because you want to keep your foot in it more because of the extra power, LOL. A true 85% E85 will use 33% more fuel than a true 0% ethanol content gasoline if you drive the car exactly the same way on both fuels. The problem with that equation is that almost all gas is at least E10 now, and some is as high as E20. If you go from E10 to E85, you'll use 30% more fuel. E20 to E85 will use 27% more fuel.

The sweet spot for a naturally aspirated car is to find a station that sells E70. You'll get all the performance of E85 with minimal impact on mileage. E70 with only use 20%-24% more fuel than E10-E20. Hope this is helpful to someone.

When I had the E85 map on in my BMW, I would pump a certain amount of E85 and a certain amount of 91 to get about an E50mix. My gas mileage didn't drop much at all. Maybe 2-3mpg on the freeway. I average about 31mpg on my commute so it really only affected it about 10% in real world driving. I'm sure it would have been more in city driving though.

[Nataphen]

Originally Posted by Eric SS

When I had the E85 map on in my BMW, I would pump a certain amount of E85 and a certain amount of 91 to get about an E50mix. My gas mileage didn't drop much at all. Maybe 2-3mpg on the freeway. I average about 31mpg on my commute so it really only affected it about 10% in real world driving. I'm sure it would have been more in city driving though.

Mazdaspeed and Focus ST folks do this as well. With forced induction, the higher the ethanol content, the better the power. It keeps the combustion temps so much cooler that turbos and superchargers love it. The problem at that point with most direct injection fuel systems is that they can't move that much fuel. Most use E50 because the fuel system can't handle much higher ethanol content than that, and you still get much more power than a gasoline tune.

On an NA engine, anything past E60 is going to give indistinguishable gains, but mixing fuels is a bit of a pain. Whatever they sell at the pump will do just fine for me. Thankfully, I think the LT1 fuel system has a lot of headroom, and it can handle the volume that higher ethanol content fuels require. Maybe not if you do a really big NA power build, but it's fine for the usual round of upgrades as far as I know.

[IOMike]

That's the beauty of a ethonal sensor integrated with the car. You don't have to get an exact mixture for the car to compensate correctly.

[IOMike]

Originally Posted by Nataphen

FF sensors have their issues too as they can't account for moisture in the system. The car adjusts quickly enough using the O2 sensors that your fueling is corrected almost immediately. Either way works, it's just that you don't have to splice in a harness doing it the other way. AED showed a video of the AFR adjusting from a switch to E85 on the dyno, and it took less than 4 minutes of part throttle driving to fully adjust without using a FF sensor.


http://youtu.be/hH-QdHqFhN4

Adjusting off 02s is a really poor way for dong it. It's not all e85 or all e10. Knowing the percentage of alcohol can only be considered a good thing. Yes it may not take all variables into account, but you're starting with a much more accurate number. GM cars use the sensor and still adjust off 02s using fuel trims to adjust as needed.

[Nataphen]

Originally Posted by IOMike

Adjusting off 02s is a really poor way for dong it. It's not all e85 or all e10. Knowing the percentage of alcohol can only be considered a good thing. Yes it may not take all variables into account, but you're starting with a much more accurate number. GM cars use the sensor and still adjust off 02s using fuel trims to adjust as needed.

I wasn't saying it couldn't adjust to different levels of ethanol. The tune in that video is a flex fuel tune also, he was just showing how quickly it can adjust. I agree that tuning off of the FF sensor and the O2 sensors is the best way.

[SS 1LE]

Originally Posted by pinoyscorpion951

I spoke with Troy Gleason at Cunningham Motorsports about this and they are still trying to work out the kinks in this conversion. It's not available to the public yet. There's a video of their 6th gen shop car with just an E85 conversion and tune doing a roll race with a modded evo and modded mustang gt and it just left both of them in the dust. The chase car was that was filming was a twin turbo Camaro that was able to keep up but man that 6th gen was fast.

Link?

[Netslave]

*not my car, just the result of when people rush things into production chasing the almighty dollar and do not test them appropriately.