Going green, or eco friendly with cars isn’t all that bad with your working with Cobb Tuning, who have modified this Nissan GT-R to run on E85 ethanol gas. Ethanol, or some would say corn oil, is a blend of 85% ethanol and 15% gasoline which was originally developed as a bio-fuel or flex fuel. However, E85 has become an alternative fuel choice for car tuning enthusiasts seeking large performance gains from a relatively inexpensive modification. This new ethanol E85 mix carries a 105 octane rating, and we all know what that means, more octane more power. Cobb Tuning has done just that with this new Nissan GT-R, to see how much extra power they could pull on the dyno.
To handle the new fuel, Cobb Tuning replaced the stock injectors with 30% larger 800cc Deatchwerks injectors. Two Walbro 255 fuel pumps were also needed, and a couple extra parts include Cobb’s catless midpipe leading to the prototype catback exhaust. With all this custom work, the Nissan GT-R was able to put down 574 hp and 585 ft lbs of torque. Cobb believes that some extra tweaking and tuning will result in 600 horsepower to the wheels, but nothing guaranteed yet.
In the graph below you can see the blue lines represent the car as it sits completely stock, running 92 octane. The red lines include the exhaust parts mentioned above, but still running on 92 octane. Now the green lines shows what the addition of 105 octane ethanol, larger injectors, and more powerful fuel pumps will bring you. It’s a good bet to believe ethanol gas will be around for some time with these results, showing that improved efficiency can also yield big performance gains.
[Source: Cobb Tuning]