The Easiest Mustang 5.0 GT and GT350 E85 Flex Fuel Kit

April 04, 2018
The Easiest Mustang 5.0 GT and GT350 E85 Flex Fuel Kit
E85 has been a popular fuel for tuning in the import and turbocharged automotive performance community for a while now, and for good reason. With proper setup, E85 makes more power than gasoline or race gas, is cheaper than race gas and even premium, and is available at many gas stations nationwide. Recently, tuners and owners of domestic vehicles like the Mustang 5.0 GT and Shelby GT350 have started to take notice of the performance benefits of E85, but there haven't been any Ford Mustang or GT350 flex fuel kits developed. Until now, the only way to run E85 in your Mustang or GT350 was by essentially hacking the ECU by removing the trim limitation. That was a poor option and couldn’t account well for the variations in E85 that come from the pump. It's impossible to just fill up and step on it without risking your engine. [caption id="attachment_1543" align="aligncenter" width="750"]Comparison of E85 vs MS109 race gas recorded the same day on the same test vehicle Comparison of E85 vs MS109 race gas recorded the same day on the same test vehicle[/caption] For those who are unfamiliar, E85 is nominally 85% ethanol, usually derived from corn, and 15% traditional gasoline. This fuel blend behaves like high octane race fuel that produces higher levels of both horsepower and torque. But the reality of E85 is that it ranges widely in actual ethanol content at the pump. The fuel you get from the pump could have an ethanol content as low as 51% (or even lower at some pumps), and when you factor in the mixing that happens with the gasoline that’s still left in your tank and your fuel lines when you add E85, that percentage can drop even further. That is the biggest problem with so-called E85 tunes that can be loaded onto your vehicle's ECU. A typical E85 tune is only applicable to the specific tank of fuel it's developed with, which usually has an amount of ethanol in the tank that is unknown to the tuner. The next fill up will have a different ethanol content percentage and your tune will suddenly be off, resulting in your vehicle running less than ideally and making less power than you were advertised it would. Do you really want to re-tune your vehicle with every new tank of E85? We didn't think so. Even with supposed flex fuel tunes, they only start adjusting after they sense an issue such as a lean condition happening. This means your engine has already run lean and it now has to attempt to fix that. When you’ve spent so much money on your prized Mustang, knowing that it’s frequently running lean and potentially harming your engine is the last thing you want. Enter the PROFLEX Commander for the Ford Mustang 5.0 and PROFLEX Commander for Shelby GT350 E85 Flex Fuel systems which give you plug-and-play performance right out of the box. There are no map changes or pumps to switch. As soon as it's installed you can run E85, gasoline, or any blend of the two seamlessly without any adjustment or further tuning. Everything is adjusted on-the-fly based on the real-time ethanol content of the actual fuel entering your engine. The PROFLEX Commander does it all for you, automatically. If you're still running on gasoline, you're leaving power on the table without experiencing the full potential of your Mustang 5.0 GT or Shelby GT350. The PROFLEX Commander is the most advanced E85 system for the Mustang ever developed and adds horsepower and torque across the entire rev range. Get one on your car with an installation that can be done in your own garage. Each kit comes with:
  • PROFLEX Commander Unit for either Mustang GT or Shelby GT350
  • Flex fuel sensor with fittings
  • Plug-and-play wiring harness