Video answer: 100 octane race gas in my hellcat at the track! results?
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Sunoco® Standard™ is a 110 octane leaded race fuel that is used in many forms of motorsports.
Video answer: “octane and race engines - what you need to know” by motorsports fuel and equipment / race-gas
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We decided to see how three different race-gas blends (VP Racing Import, C16 and Q16) would affect the performance and tuning on our Project S15. On a diet of 91-octane pump gas, the SR20DET engine consistently produces over 320 horsepower to the wheels.
Since that first day of testing we have tested Race-Gas against everything from 98 octane to 116 octane distilled racing fuel and in engines as large as a 550 CI at 13.5:1. Every time Race – Gas performed as advertised!”
Each fuel company can have its own definition of “race gas,” notes Zachary Santner, technical specialist for Sunoco Race Fuels. For Sunoco, products with an octane rating of 95 and higher fall under its Race Fuels banner. The brand currently offers some 20 different blends.
Race fuel has a much higher octane than pump gas because those engines have higher compression ratios. Most new cars today can run on regular 87 octane because those engines are designed for that kind of fuel. Race cars, however, tend to have higher compression ratios so they thrive on the higher octane fuels.
This is why you don’t see many unleaded racing fuels with octane ratings much over 100, while their leaded counterparts can get close to 120 octane. Another advantage: lead doesn’t have a significant effect on combustion properties like flame speed.
Regular (the lowest octane fuel–generally 87) Midgrade (the middle range octane fuel–generally 89–90) Premium (the highest octane fuel–generally 91–94) Some companies have different names for these grades of gasoline, such as unleaded, super, or super premium, but they all refer to the octane rating.
Racing fuel typically has a higher octane rating, such as 98-octane Sunoco Green E15. E85 is rated at 100-plus octane, up to 105 octane or more. Why Do Some Manufacturers Require or Recommend Use...
So essentially I'd be at $2.50 per gallon of 93 octane plus $1.65 per gallon giving me a total of $4.15 per gallon of ~100 octane. This appears to be way cheaper than purchasing actual race gas so I assume there is a catch. My application is this: 383 road race motor (3000 - 6,200 RPM for 40 minutes at a time) 11:1 static compression ratio
Some Chevrolet crate engine racers prefer 110 racing fuel or a mix of 110 with pump gas. Baldwin Racing Engines discourages both practices. Instead, they recommend 93 octane pump gas, because it does not contain ethanol, or 91 octane pump gas from a reputable brand name.