This IS racing...Would you really trade performance for "political correctness"? I mean, really, your machine is a monster diesel. It is the fastest in the world in that class, and you want to give ground to a huge crowd of people that will not accept you no matter what you concede? They want you in an electric, or at the very least a "smart" car.
Now maybe for a biodiesel class? That may gain traction without compromise...just a thought...just my (maybe) young and ignorant view of course...no offense meant in any case...
Running biodiesel could perhaps net you sponsorship from biodiesel shops. They are often looking for marketing opportunities that show biodiesel to be "good stuff".
Here's what I know about diesel fuel:
Biodiesel or veggie oil will make about 4% less power, but that just means we have to inject more of it. It has a slight advantage at high rpm.
Synthetic diesel is made from natural gas, makes slightly more power, and has better high RPM operation and lower emissions. Some of this is already being blended into petro fuel, and it will increase as supplies increase. Some countries get a lot of this fuel, if not all. Dubai is the largest exporter.
You can increase high RPM performance by using Cetane boosters. Higher cetane ratings allow the fuel to ignite easier and burn faster. 2EHN is the most common, and is a major ingredient in off-the-shelf diesel fuel additives.
Shell blends a special roadracing fuel for Audi for low smoke and high RPM performance. This is not available to the average racer.
For cold areas in the winter, the pump fuel is often mixed different, we call this Winter Fuel. It makes less power, but does not gell as easy, which is a real problem with diesels in cold weather. If you wonder why your mileage drops in the winter in snow areas, this is the reason.
Red diesel is for off-road use only. It contains a red dye for the DOT to detect. It is normal #2 unless otherwise labeled. No road taxes are added to it. You will rue the day you are caught with it on the street, as the fine can be $10k.
#1 diesel is pretty close to plain kerosene, and is seldom used anymore. Don't run this in your late model engines. Usually it's red fuel anyhow, IIRC.
We run only normal #2 pump fuel with no additives and pure water mist to save the turbine from melting.
But unlike spark ignition fuel, there is no Super Fuel for diesels. Normal #2 pump diesel is just about as powerful as anything you can use. Yes, for high RPM engines, improving the cetane will improve performance, but nothing like methanol or nitromethane does with spark engines. Our high cetane fuel mixes are perhaps equivalent to what is called gasoline by the SCTA. SCTA gasoline is not pump gas, which is 91 octane often cut with ethanol, very crappy stuff. Why diesels are limited to pump fuel? This I can't answer. I have a feeling though, that it was because there was not much known about it, so they "played it safe".
If a hardcore diesel racer ever gets the ear of the SCTA, I imagine they will just drop the whole "event diesel" thingy. Having gasoline guys determine what is and isn't diesel fuel, is like asking a priest for sex advice.
