Emissions Warning: This product is not designed for public highway or street use, and is only legal for formally sanctioned race use on a racing vehicle that may never be used on a public highway or street.What is a Flex Fuel Kit in simple terms? It is basically a special sensor installed along one of your fuel lines that reads the amount of ethanol in your fuel, produces a signal, and sends a processed version of that signal to your ECU for use by your tuning device. Combined with a tuning device, it converts your Honda Civic to run on higher concentrations of ethanol (like E85) than is in standard pump gas.
TIP: Your gas tank is not required to just have all E85 fuel in it after installing this kit (hence the name Flex Fuel). It can have any combination of E85 and non-E85 gasoline in it. Your tuning device will automatically adjust on the fly for your current fuel mixture.
- Allows you to run E85 fuel and mix it with regular pump gas.
- Potential for huge power/torque gains.
- Helps to spool a turbo earlier and faster.
- Allows the engine (and turbo) to operate considerably cooler.
- Enables the ECU to dynamically adjust your tune, for a given amount of ethanol percentage.
- Great bang for your buck power adder (especially for boosted/forced-induction vehicles).
- Easily monitor your E85 / Ethanol-Percentage level with the included Innovate digital gauge.
- You can choose to run regular gasoline and only pump E85 when you desire more power/torque.
- This kit was thoroughly tested and designed with very reliable components.
- Easy to install and features pre-assembled fuel lines to plumb the Ethanol Sensor.
- Comes with comprehensive installation instructions.
- Covered by SiriMoto's 1 Year Limited Warranty.
- Includes everything you need for a complete installation.
- Plug and Play (PnP) solution, does not require any cutting/splicing of wires.
- Premium Chasiss Harness constructed with:
- Tefzel Wiring.
- Deutsch Connector.
- Flame-Retardant Nylon Sleeve.
- Sturdy Ethanol Content Sensor Bracket for lifetime reliability.
- Includes Gauge Pod to easily mount the Innovate digital gauge.
- Custom SiriMoto Flex Fuel Badge included with every kit!
- Gains of 65+ hp and 70+ lb-ft of torque with just a Hondata basemap!
- Available Base Calibrations will provide peak performance between 25-40% ethanol (E25 to E40) concentrations. This is a general recommendation and your exact optimal ethanol % will vary depending on your other bolt-ons and if you use a custom tune or not.
- The FlashPro has a specific safety strategy for the Type R: boost will decrease as ethanol concentrations surpass 30% (E30) mixtures.
- Boost is reduced in this manner because the stock High Pressure Direct Injection Fuel Pump cannot supply the necessary fuel volume for full boost above E30.
- Only compatible with Hondata FlashPro; KTuner platform does not allow for Flex Fuel capability.
- Gains of 60+ hp and 60+ lb-ft of torque with just a Hondata basemap!
- Available Base Calibrations will provide an increase in power/torque as ethanol content increases, providing peak performance at 50~70% ethanol (E50 to E70) concentrations.
- Capable of supporting 300+ whp with upgrades and custom tune.
- For custom tunes, E30~E40 fuel mixtures provide the best power and fuel mileage.
- Compatible with both Hondata FlashPro and KTuner.
- For vehicles equipped with a CVT transmission, torque gains are limited to ensure reliability.
- Base Calibration available for vehicles using the SiriMoto Flex Fuel Kit and SiriMoto EV14 Injectors.
- For those with a custom tune, Base Calibration Settings are available upon request.
- Optional SiriMoto EV14 550cc Injectors:
- Fit both stock and RBC intake manifolds.
- Feature Plug and Play (PnP) connectors.
- Capable of supporting up to 300 hp.
- Compatible with pump gas and E85.
- Optional Grams Fuel Pump:
- Flows 265LPH and capable of supporting 400 hp.
- Compatible with pump gas and E85.
- Typical gains of 15~20% in power and torque on boosted applications (5~10% on naturally aspirated engines).
- Only compatible with Hondata FlashPro; KTuner platform does not allow for Flex Fuel capability.
- Must use higher flowing fuel injectors; stock injectors do not flow enough fuel to support E85.
- The stock fuel pump is capable of delivering the necessary fuel flow for naturally aspirated vehicles, but long term use will shorten its life-span due to the corrosive nature of ethanol. For continuous use of E85, an upgraded fuel pump is recommended.
- Base Calibration Settings available for vehicles using the SiriMoto Flex Fuel Kit and SiriMoto EV14 Injectors.
- Optional SiriMoto EV14 550cc Injectors:
- Fit Stock RBC and aftermarket K20 intake manifolds.
- Feature Plug and Play (PnP) connectors.
- Capable of supporting up to 300 hp.
- Compatible with pump gas and E85.
- Optional Grams Fuel Pump:
- Flows 265LPH and capable of supporting 400 hp.
- Compatible with pump gas and E85.
- Typical gains of 15~20% in power and torque on boosted applications (5~10% on naturally aspirated engines).
- Only compatible with Hondata FlashPro; KTuner platform does not allow for Flex Fuel capability.
- Must use higher flowing fuel injectors; stock injectors do not flow enough fuel to support E85.
- The stock fuel pump is capable of delivering the necessary fuel flow for naturally aspirated vehicles, but long term use will shorten its life-span due to the corrosive nature of ethanol. For continuous use of E85, an upgraded fuel pump is recommended.
Q:
What is E85 and why does it easily give so much more power?
A: E85 is a biofuel composed of up to 85% ethanol. The remaining 15% of the fuel is traditional gasoline. Keep in mind the ethanol percentage can be lower during the winter months in some areas. The ethanol often is made from corn and is the same type of alcohol you would find in hard liquor, with the exception that fuel ethanol is denatured with additives to make it undesirable and harmful to drink.
The main reason E85 allows for some much more power than traditional gasoline is that it has a very high octane rating, usually from around 100 to 105 octane, compared to 91 to 93 octane from normal gasoline. This high octane rating allows E85 to resist engine knock. Engine knock occurs when areas of the air fuel mixture ignite before the should due to excessive heat for the fuel type used. This is bad because it can cause extra stress on the engine, and doesn't make optimal power either. From the factory, a new engine is almost always "knock limited", which means it cannot achieve its maximum design power on normal gasoline due to engine knock occurring. E85 basically eliminates this constraint, allowing the engine to achieve the maximum power possible. This especially applies to engines that are turbocharged from the factory.
One nice side effect of that is that extra E85 fuel will help cool your combustion chamber and turbo, and thus help maintain maximum power and reliability. E85 fuel is also generally a lot less expensive than normal pump gas too!
Vehicles sold in the U.S. are designed to operate correctly on the factory tune when using fuel that contains between 10% (E10) and 15% (E15) ethanol. E10 is normally found at almost every standard gas pump in the U.S., so you most likely fill up with it all the time. The reason for this is that ethanol has been found to reduce overall emissions while keeping engine performance strong (see
https://afdc.energy.gov/fuels/ethanol_benefits.html for more information).
Q:
Why a Flex Fuel kit?
A: The "Flex Fuel" part of this kit refers to the ability to run a varying amount of ethanol without having to re-tune or worry about exactly how much E85 you filled up with. In general, the more you fill up with, the more power you get, up to a certain extent. 30-50% ethanol is a typical range for maximum performance and efficiency.
Q:
Ok, so what do I need to buy?
A: All you need is this SiriMoto Flex Fuel Kit and a red (Race) Hondata FlashPro (or similar tuning solution), along with some E85. This flex fuel kit constantly monitors how much ethanol is in your fuel, displays it for your information on the digital gauge, and then tells the FlashPro. The Hondata FlashPro dynamically recalibrates your ECU to give the optimal power gains on any percentage of ethanol you happen to have in your tank.
Q:
Is a custom tune necessary?
A: No, it is not. To get the advertised gains, all you need to do is install this kit, reflash your ECU with the appropriate E85 Hondata FlashPro basemap, and fill up with some E85. If you have a CVT transmission, torque gains will be limited to ensure transmission reliability. If you have a manual transmission and want even more power, a custom tune (higher boost and more aggressive timing) combined with other bolt-on parts can easily push you past the advertised gains. Keep in mind that the Hondata FlashPro basemaps are deliberately conservative, designed with maximum reliability in mind. If you get a custom tune, you will find that you will not see much power gains going over 30-50% or so ethanol in your tank. However, as mentioned, a Hondata basemap will offer better reliability as it is conservative enough to account for sensor inaccuracy and uses a bit more E85 for any given power level, so your engine and turbo will operate cooler.
Installation Info: This product requires a Race Hondata FlashPro. It will not work with the blue CARB Compliant / Exempt FlashPro. It works with other compatible tuning solutions too (like KTuner), but you might have to adjust the voltage output ranges on the Innovative gauge. To experience the power gains of this product, you will also need access to E85 fuel.
Ethanol Sensor Info: Direction of flow and orientation of the sensor is not critical. Also, the sensor can be installed on the fuel feed (pressure) side but is not recommended it be subjected to over 100 PSI of pressure. Plumbing the sensor to the return line is possible as well, but not always necessary as the sensor can flow enough fuel for 500+ hp.
