I would disagree. Pumps are all over the place with ethanol % for E85. The highest full tank of it I've seen is 78% here.My bad I didn’t describe the information that I wanted clearly enough. I want to stay on 93 for the track but I heard that 93 tends to be more inconsistent than e85 when it comes to quality of fuel. So I wanted to hear everyone’s experiences with both when it came to consistency and overall health of the car during track days.
Ethanol content learning and the associated fuel trim is not active in the PCM stock. You need a flex fuel tune for that. It works very well, and operates in the same way as the 2015-2017 F150 with the 5.0 or 3.5L NA on their stock calibrations. It's worth 15+ whp on an NA GT over a 93 tune and because of the burn characteristics (cooler) and octane rating (107 on 85% IIRC), is 'safer'. The big downside is that it requires upsized injectors and is about 30% less efficient to run."When switching fuel octane, it takes some time for the PCM to adjust ignition timing to take advantage of the higher octane. This value is known as OAR - Octane Adjust Ratio and is a multiplier. It starts at 0 and learns from there based on knock feedback towards +1 for less than optimal fuel and towards -1 for high quality fuel. Our car was driven for 2 weeks after the change from 87 to 92 octane to ensure it was at -1 OAR and then the comparison pulls were made."
https://www.speedfactoryracing.net/mustang-ecoboost-dyno-data
Why even fiddle with E85? It's an expensive engine? I don't get it.
It doesn't require upsized injectors.Ethanol content learning and the associated fuel trim is not active in the PCM stock. You need a flex fuel tune for that. It works very well, and operates in the same way as the 2015-2017 F150 with the 5.0 or 3.5L NA on their stock calibrations. It's worth 15+ whp on an NA GT over a 93 tune and because of the burn characteristics (cooler) and octane rating (107 on 85% IIRC), is 'safer'. The big downside is that it requires upsized injectors and is about 30% less efficient to run.
Depends on your mods. For street driving on stock manifold and headers, no (I am running flex with stock injectors). If you increase airflow significantly and raise the rev limit, you'll run out of injector bandwidth. On the track I wouldn't risk running stock injectors as you're sitting at a very high duty cycle the entire time for extended sessions.It doesn't require upsized injectors.
Because E85 is awesome. Educate yourself before you start saying more stupid shit on a car enthusiast forum. Also, it doesn't take two weeks to get the OAR to learn, it can be done in 30 minutes. I know this from experience and calibrating on the Focus ST platform."When switching fuel octane, it takes some time for the PCM to adjust ignition timing to take advantage of the higher octane. This value is known as OAR - Octane Adjust Ratio and is a multiplier. It starts at 0 and learns from there based on knock feedback towards +1 for less than optimal fuel and towards -1 for high quality fuel. Our car was driven for 2 weeks after the change from 87 to 92 octane to ensure it was at -1 OAR and then the comparison pulls were made."
https://www.speedfactoryracing.net/mustang-ecoboost-dyno-data
Why even fiddle with E85? It's an expensive engine? I don't get it.
You have an Ecoboost, you should be all over e85.....go do some research on the benefits of ethanol or e85 in a turbo direct injection engine then come back and tell us it still sucks....:headbonk::headbonk:"When switching fuel octane, it takes some time for the PCM to adjust ignition timing to take advantage of the higher octane. This value is known as OAR - Octane Adjust Ratio and is a multiplier. It starts at 0 and learns from there based on knock feedback towards +1 for less than optimal fuel and towards -1 for high quality fuel. Our car was driven for 2 weeks after the change from 87 to 92 octane to ensure it was at -1 OAR and then the comparison pulls were made."
https://www.speedfactoryracing.net/mustang-ecoboost-dyno-data
Why even fiddle with E85? It's an expensive engine? I don't get it.
"When switching fuel octane, it takes some time for the PCM to adjust ignition timing to take advantage of the higher octane. This value is known as OAR - Octane Adjust Ratio and is a multiplier. It starts at 0 and learns from there based on knock feedback towards +1 for less than optimal fuel and towards -1 for high quality fuel. Our car was driven for 2 weeks after the change from 87 to 92 octane to ensure it was at -1 OAR and then the comparison pulls were made."
https://www.speedfactoryracing.net/mustang-ecoboost-dyno-data
Why even fiddle with E85? It's an expensive engine? I don't get it.
"When switching fuel octane, it takes some time for the PCM to adjust ignition timing to take advantage of the higher octane. This value is known as OAR - Octane Adjust Ratio and is a multiplier. It starts at 0 and learns from there based on knock feedback towards +1 for less than optimal fuel and towards -1 for high quality fuel. Our car was driven for 2 weeks after the change from 87 to 92 octane to ensure it was at -1 OAR and then the comparison pulls were made."
https://www.speedfactoryracing.net/mustang-ecoboost-dyno-data
Why even fiddle with E85? It's an expensive engine? I don't get it.