Corn Fed. An Inside Look at E85 – Rezmoto Tech Corner

What is E85?

From the Crowmod, to daily driven street machines, E85 has taken the performance world to new levels. To those unfamiliar with E85, here’s a quick summary: Sometimes called “flex fuel,” E85 is comprised of (hopefully) 85% ethanol and 15% gasoline. It is a biofuel made from organic materials and is a “friendly” fuel. It just so happens that E85 also has the potential to put down 100-116 octane horsepower with more friendly pump gas prices. We”ll discuss pros and cons, how it’s made, and the hype behind this “new” race fuel.

E85 Ethanol molecule

Back to the Future

Everyone knows that scene from Back to the Future when Doc starts stuffing trash in the Deloreans Mr. Fusion. Well, fast forward from 1985 to present day. The U.S produces around 15 billion gallons of ethanol a year mainly from corn and corn waste products. Brazil, the world’s second largest producer of ethanol mainly uses sugarcane. Together we produce roughly 85% of the world’s ethanol.

We won’t bore you too much with how it’s made, but being a biofuel means that it can be made from what was previously “waste” products in the agriculture world. Let’s rather discuss what it can do. E85 is well known in the performance and racing world for its superior resistance to detonation over pump gas.

But why is it so good? Ethanol has a much lower latent heat of vaporization than gasoline, meaning that it cools the intake charge as it changes from liquid to vapor. Much like the effects of water/methanol injection. Combine the cooler air density and the effective 100+ octane rating and you have a fuel that is highly resistant to detonation. At Rezmoto, we have seen E85 perform as well as 116 octane race fuel. That’s pretty impressive considering the cost of E85 is five to six times cheaper.

What’s All The Hype About?

Making the decision to switch to E85 takes some careful consideration. Due to E85’s lower energy content than gasoline per gallon, and it’s richer stoichiometric AFR, you’ll have to inject about 35-40% more E85 than you would need for gasoline. So yes, your MPG will take a hit as well. (About 25%) Also availability of E85 where you live, work, or race should be considered.

So what does all of this mean? More boost, more timing, more power. Resistance to detonation, cooler air density, and lower EGTs. It’s a tuners dream come true. What does it mean for you? It means you can run your smaller turbo, and have the potential for big turbo power without the lag. Wide, long, torque and horsepower curves are what we all desire right?

With today’s Audi and Volkswagen market the trends have shifted from custom “big” turbo setups to smaller frame hybrid turbos. Turbo technology has advanced significantly in the last ten years. Long gone are the days of turbo lag and waiting for a high spiking, short powerband. We want torque now, and little lag. The daily drivers best friend when sitting next to six plus liters of American muscle. Technology and tuning is the replacement for displacement.

Vendor Spotlight.

Many of today’s tuners and manufacturers have benefited from E85. At Rezmoto we sourced what we feel is the best in the world for fueling solutions. DeatschWerks has provided a complete E85 friendly lineup of everything from your in tank fuel pump, all the way to the injectors. This makes previous fueling nightmares a no brainer. Ignite racing fuels produces possibly the best E85 in the world, meeting true E85 mixtures with only high quality ingredients. SPA turbo has many world records in the VW and Audi community, while pushing the limits of E85 tuning capabilities. With Eurodyne Maestro your tuning solutions can be easily achieved as well.

Contact Rezmoto today for your hybrid turbo, E85 tune, or the road map to true power you can see and feel. We’ll help you turn your dreams into reality.

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