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COBB Subaru FA20DIT Flex Fuel Ethanol Sensor Kit and Optional Tuning - 2015-2017 WRX

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As low as: $600.00

Price as configured: $600.00

A complete plug and play solution enabling users to convert their supported Subaru WRX to a Flex Fuel configuration. This is the easiest to use and most sophisticated Flex Fuel kit on the market. Utilizing OEM fuel and electronic connectors, the Ethanol Sensor Kit measures the ethanol content of fuel being fed to the motor. That data is then converted into a signal that the ECU can use for adjusting calibrations and to be displayed on a custom Accessport monitor.

NOTE: Requires custom tuning. Remote Protuning via SubiSpeed available. We will contact you after purchase to gather details about your vehicle.
COBB Subaru FA20DIT Flex Fuel Ethanol Sensor Kit - 2015-2016 WRX   (In Stock)   +$0.00

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Price as configured: $600.00

Description

Details

COBB Flex Fuel Upgrade

A complete plug and play solution enabling users to convert their supported Subaru WRX to a Flex Fuel configuration. This is the easiest to use and most sophisticated Flex Fuel kit on the market. Utilizing OEM fuel and electronic connectors, the Ethanol Sensor Kit measures the ethanol content of fuel being fed to the motor. That data is then converted into a signal that the ECU can use for adjusting calibrations and to be displayed on a custom Accessport monitor.


SubiSpeed Overview Video

SubiSpeed Installation Video


Fuel System Considerations

As with other DIT platforms i.e. VW, BMW, Mazda, the fuel pumps in Subaru DIT vehicles are not designed for ethanol use beyond 10-15%. That said, ethanol levels between 15-30% are generally well tolerated. Those comfortable with mild risk can run ~E30 and enjoy improved knock resistance, charge air cooling, and a mild improvement in engine power potential. While you can't get E30 at the pump, pumping a combination of E0/E10 gas and E85 in an appropriate ratio will allow blending of a near E30 mixture in your tank.

On DIT platforms not set up for flex fuel from the factory, at greater than 30% concentration, ethanol has caused oscillating fuel pressure first, progressing to loss of fuel pressure, high pressure fuel pump damage, even making the vehicle inoperable in some cases. Sudden loss of fuel pressure can cause sudden loss of acceleration, stalling, which can reduce braking performance and steering control. Long story short, while the power potential is very attractive, use of high ethanol content fuel is at your own risk.

COBB has performed internal testing in multiple geographic locations with different fuel sources in addition to compiling data from COBB retail shops, our Protuner network, and customers. Results varied significantly. Some users ran several tanks of E85 in a row without issue while some experienced serious loss of fuel pressure in as little as 1-2 tanks of fuel.

We suggest monitoring fuel pressure for oscillations. After having fuel pressure issues, some users were able to flush the HPFP (high pressure fuel pump) out with low ethanol gasoline and get it to operate normally again, while others had to replace the whole pump assembly before they could safely drive the car again. After replacing the pump some users experienced repeat failures if they continued to run E85 fuel.

NOTE: Requires custom tuning. Remote Protuning via SubiSpeed available. We will contact you after purchase to gather details about your vehicle.


WHY?

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.


FEATURES

  • Completely Plug and Play Solution
  • Billet Aluminum Converter Case
  • Coated Aluminum Sensor Mount
  • OEM Quality Electrical Connectors
  • OEM Quality Fuel Line Connectors

The Story

Earlier this year COBB was able to release COBB Custom Features for the 2008+ WRX and STI. The most sought-after feature in that release was the ability to create true Flex Fuel calibrations for your car. Gone are the days of having to switch calibrations every time you visit the gas pump. The Flex Fuel calibration simply utilizes the actual ethanol content of the fuel to appropriately blend an assortment of related tables. Today, we are extremely excited to announce that COBB Custom Features, including Flex Fuel, are now available for the 2015-2017 USDM Subaru WRX!


The Dyno

The following dyno sheet gives a good idea of how taking advantage of higher ethanol contents can result in increasing power and torque. The car used for these pulls is utilizing a COBB Stage 2+ Big SF Power Package (Non-Resonated J-Pipe) with the addition of our Flex Fuel Ethanol Sensor Kit and Flex Fuel tuning strategy. As you can see, power improves significantly by simply increasing ethanol concentration.

Red indicates 15% Ethanol
Blue indicates 48% Ethanol
Green indicates 74% Ethanol


The Track

After dialing in their 2015 WRX on the dyno, they took it to San Antonio Raceway (1/4 Mile) to get some real world results. As you can see in the video, by simply increasing the ethanol content from E10 (93 octane) to E73 they saw the 1/4 Mile trap speeds increase by over 6 MPH!! This, again, is with a car that is utilizing the COBB Stage 2+ Big SF Power Package (Non-Resonated J-Pipe) and Flex Fuel Ethanol Sensor Kit. That’s it, no other performance modifications.


The first step in setting your vehicle up for Flex Fuel is to install the COBB Flex Fuel Ethanol Sensor Kit. This is the easiest to use and most sophisticated Flex Fuel kit on the market. Utilizing OEM fuel and electronic connectors, the Ethanol Sensor Kit measures the ethanol content of fuel being fed to the motor. That data is then converted into a signal that the ECU can use for adjusting calibrations and to be displayed on a custom Accessport monitor.

  • Utilized by COBB Flex Fuel Tables, Retains All Factory Compensations
  • Custom DTC Error Reporting for Water in Fuel
  • Billet Aluminum Converter Case
  • Coated Aluminum Sensor Mount
  • OEM Quality Electrical & Fuel Line Connectors

Flex Fuel Badge

This emblem can be affixed to your trunk or any other part of your vehicle. The logo features a half yellow, half World Rally Blue X. A nice custom touch for any Subaru Flex Fuel Kit owner.


This Part Fits

  • 2015-2017 Subaru WRX COBB Subaru FA20DIT Flex Fuel Ethanol Sensor Kit and Optional Tuning

Additional

Additional Information

Installation Instructions Download here.
Additional Warranty Information None

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