What is a WRX flex fuel kit?

The Flex Fuel Ethanol Sensor Kit is a requirement for converting your supported Subaru to a Flex Fuel configuration. The Ethanol Sensor Kit measures the ethanol content of fuel being fed into the motor and converts it into data that can be utilized by the car’s ECU.

What is needed for flex fuel WRX?

On the FA engine (2015+ WRX) you will need an upgraded in-tank fuel pump and a tune. On Mitsubishi EVO VIII, IX, & X you will need upgraded fuel injectors and an upgraded fuel pump. On the 2013+ BRZ/FRS all you need is a tune. One downside is E85 requires up to about 50% more fuel then regular 91 octane.

How does a flex fuel tune work?

– A FlexFuel system informs the ECU (engine control unit) through an ethanol content sensor and electronics, that measure the actual content of Ethanol in the fuel system. Knowing the content allows the ECU to determine proper start up enrichment, fueling, timing, boost and cam control.

Is Subaru a flex fuel?

“Flex Fuel” (FF) functionality is supported for select turbocharged Subarus utilizing the COBB Custom Features ECU. In short, COBB’s Flex Fuel feature encompasses these custom code features: Seamless switching of fuels between low ethanol fuel and high ethanol fuel.

What is the benefit of flex-fuel?

Ethanol burns cleaner than gasoline, which means flex-fuel cars pump fewer toxic fumes into the environment. Flex fuel also contributes fewer greenhouse gases, making it a more environmentally friendly option than traditional gasoline.

Can you run a flex fuel kit without a tune?

Registered. Yes. You’re able to hook up the fuel lines and run everything, but you can’t hook up the power wire. If you do, you’ll get secondary air pump codes.

Why are people mad at Cobb?

But people are mad because they purchased Cobb parts, like its flex-fuel kit, as recently as a month ago and will not receive support from the manufacturer.

How much HP does E85 tune add?

Forced induction often nets the largest gains from E85, because you are not limited to just adding more spark, like an N/A engine is. More boost is a huge benefit and can net 15-25 hp per pound of boost, which means much more gains are available on forced induction versus N/A, when switching to E85.