E85 questions...
- Thread starter MrMezger996
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With the Supra, I was flex fuel, so I really didnt care. I tuned it on good E85 and then just let the haltech do the rest.
The Evo, I was on the stock ecu and had to switch between 93 and E85 maps. I had the car tuned on Thorntons, which was usually 75% or above. Basically, I went to any E85 station except Shell (its garbage) and didnt really care. It worked out fine. If you're on FB, join an E85 group since those folks are always testing.
Somewhere on the site, I posted a breakdown of stations with their %. I'll have to find it.
The Evo, I was on the stock ecu and had to switch between 93 and E85 maps. I had the car tuned on Thorntons, which was usually 75% or above. Basically, I went to any E85 station except Shell (its garbage) and didnt really care. It worked out fine. If you're on FB, join an E85 group since those folks are always testing.
Somewhere on the site, I posted a breakdown of stations with their %. I'll have to find it.
I personally never tested a single pump. Thorntons is always reliable. Speedway was fine...Car made 700whp on 40psi. Never had a problem with bad gas. Like I said, avoid Shell.
State minimum is 51% for E85..but for the most part, you'll see 70% and above. The Fast Mart at Randall and Huntley was ALWAYS awesome. 80-85% spot on.
State minimum is 51% for E85..but for the most part, you'll see 70% and above. The Fast Mart at Randall and Huntley was ALWAYS awesome. 80-85% spot on.
I debated doing an E85 tune for the car, but I'm not interested in throwing more timing at it for potentially not great E85. I'm OCD when it comes to stuff like this. I wouldn't feel comfortable going WOT with the E85 tune unless I knew the fuel was true E85.
I had -1 degree of timing on bad 93, but "normal" hellcats do that. I data log on WOT runs during different times of the day. Still trying different stations.
I had -1 degree of timing on bad 93, but "normal" hellcats do that. I data log on WOT runs during different times of the day. Still trying different stations.
Wouldnt make a difference unless you're traveling back in time and are on the sniffer, and even then I doubt it would make a difference.
But Fords are weird with emissions now. As long as all of your monitors are reporting, you're fine. You cant have ANYTHING turned off now, rear o2 for example.
But Fords are weird with emissions now. As long as all of your monitors are reporting, you're fine. You cant have ANYTHING turned off now, rear o2 for example.
I use vp c85 , takes the guesswork out lol . It's expensive but I cut it with 93 to make e45 . It evens out the price somewhat per gallon . Still expensive though . Vp also makes x85 if you don't want to spend a lot for their high end super corn .
Sunoco makes E85r too . Not sure on price . Winners circle sells it .
Sunoco makes E85r too . Not sure on price . Winners circle sells it .
Be aware that the percentage of ethanol changes with the season. There is a website that the EPA shows when the different grades start production in different areas. So be aware that spring and fall will have limited higher ethanol mixes.
What car is this for? A 03/04 Cobra? Older ECU and equipment will not allow for great changes in a/f mixture based on the ethonal content. They don't have wideband o2 sensors and strategies that can be used to correct the a/f at part and wide open throttle. So if tuned on E85 but you get E60, for example, the car will run rich. But the thing that I more concerning is the drop in octane rating with the ethonal.
The best thing to do is tall to your tuner. Ask him what options you have for different ethonal mixtures. If it is a older car they will probably give you different tunes. Like an E60, street E85, and more aggressive timing race E85 for the likes of VP85 at the track. Something you can be confident in the fuel time and time again. Otherwise just use the E85 when it comes in season until it tests lower. Then switch back to 93.
Good E85 had a 112-114 octane rating. So well worth it if your fuel system and tuner are up to it.
Newer cars and stand alone ECU with flex fuel capability is something way more flexible. At some point something to think about if you want more flexibility, easier data logging, and more. Of you can justify the cost.
What car is this for? A 03/04 Cobra? Older ECU and equipment will not allow for great changes in a/f mixture based on the ethonal content. They don't have wideband o2 sensors and strategies that can be used to correct the a/f at part and wide open throttle. So if tuned on E85 but you get E60, for example, the car will run rich. But the thing that I more concerning is the drop in octane rating with the ethonal.
The best thing to do is tall to your tuner. Ask him what options you have for different ethonal mixtures. If it is a older car they will probably give you different tunes. Like an E60, street E85, and more aggressive timing race E85 for the likes of VP85 at the track. Something you can be confident in the fuel time and time again. Otherwise just use the E85 when it comes in season until it tests lower. Then switch back to 93.
Good E85 had a 112-114 octane rating. So well worth it if your fuel system and tuner are up to it.
Newer cars and stand alone ECU with flex fuel capability is something way more flexible. At some point something to think about if you want more flexibility, easier data logging, and more. Of you can justify the cost.
Yes, it will be on a stock ECU on a 03 Cobra, I am running twin 465 pumps, return style fuel system with ID1000 injectors. my entire fuel system is compatible with E85. I want to get car up and running with this setup and plans for future upgrades will be A2A with 01 Cobra short runner intake, and I am looking into SCT Pro Racer to see if there are any benefits there.
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