E85
Retuning the engine management system of your high performance car is the KEY to getting maximum gains. Any mechanical modification to your car (engine, intake, exhaust, intercooler, fuel system, turbo, supercharger, cams etc.) will require a change in the engine management software to get the most out of it. Parameters such as; ignition timing, fuel delivery, cam timing, boost control, boost limits, rev limits, speed limits etc. can all be adjusted to optimise the performance of your car.
Tokyo Motorsports offers first class tuning/mapping using a relentlessly accurate, in house, AWD Dynapack chassis dynamometer. This is used to measure engine speed, power, torque and fuel mixtures. Highly specialised software is then employed to adjust the Engine ECU settings (maps).
Flex Fuel
Flex fuel vehicles can run on E85, normal 98-octane petrol or any mixture of the two. This really is the best of both worlds; combining the availability of normal petrol with the added power of the ethanol for a motorsport event or track day. Additional hardware is required for a flex fuel setup – typically a fuel system upgrade (injectors, fuel pump and hoses), an ethanol content analyser and either an aftermarket ECU or a modified program for the stock ECU. Vehicles are tuned first on normal petrol and then the fuel is changed to E85. The E85 tuning is then carried out before blending fuel at different mixtures to check correct operation.
At Tokyo Motorsports Flex Fuel Tuning is available for:
- Any vehicle using a Link G4+ or G4X ECU: This uses a modeled multi-fuel equation allowing a seamless interpolation between the two fuels based on the output of the ethanol content analyser.
- Any 2007 onward Subaru tuned with ECUTEK RaceROM. This uses one of the ECUTEK RaceROM features that allows the output of the ethanol content analyser to replace the rear oxygen sensor input to the ECU. Several tables then modify the petrol tune to allow additional fuel and ignition timing giving a seamless interpolation between the two fuels.
- Any BRZ/FT86 tuned with ECUTEK. This works in the same way as the Subaru system, as above.
- Any Evo 10 upgraded and tuned using the Tephra v3 open source ROM. This has two separate tunes (one for E85 and one for normal petrol); the output of the ethanol content analyser then drives several additional tables allowing the ECU to interpolate between the two.
Contact Us for more information about E85 and Flex Fuel Tuning.
Examples
86/BRZ
The power graph showing the difference between a Supercharged BRZ running on BP98 and the same car running a flex fuel setup at approximately 80% ethanol content.
Power is increased by 30Kw and torque by 40-50Nm across the rev range.
WRX
The power graph shows the difference between a 2008 WRX (fitted with a VF52 turbo + bolts on mods) running BP98 and the same car running a flex fuel setup at approximately 80% ethanol content.
Power is increased by 30Kw and torque by 30-40Nm across the rev range with no increase in boost pressure.
