Speed Demon is a land speed racing car built in 2010 by Ron Main for George Poteet.
In September 2010, George Poteet made a serious attempt to break the flying mile and flying kilometer record for piston-engined wheel-driven cars. Speed Demon is powered by a aluminum block 'Hellfire' V8, built by Kenny Duttweiler. Their effort was thwarted by a number of parts failures. The team stated their intention to return in 2011 to set a record over , and at the 2011 Bonneville Speed Week, Poteet achieved Squatriglia, Chuck. "This is what 426 mph looks like." Autopia. Wired, August 24, 2011
The Speed Demon then made "the fastest piston engine pass ever",Landspeedevents (retrieved 3 January 2019) turning in a two-way average of .Racecar-Engineering.com (retrieved 5 January 2019) (Because this was not done within the two-hour limit demanded by FIA, the record is not considered official.)Racecar-Engineering.com (retrieved 5 January 2019)
In 2012, Speed Demon set an official record at .Science Alert (retrieved 5 January 2019); [https://www.roadandtrack.com/motorsports/news/a9366/new-world-speed-record-for-a-piston-engined-car-439-mph-38899/ Road and Track online (retrieved 5 January 2019)
Speed Demon was displayed at the 2018 Detroit Autorama.Classicarnews.com (retrieved 3 January 2019); Detroit News online (retrieved 3 January 2019)
Poteet intended to attempt the absolute record for wheel-driven cars, currently held by Don Vesco’s Turbinator, but died on July 16, 2024. Poteet was replaced by Chris Raschke, who drove the car until his death on August 3, 2025, in a crash during that year's Bonneville Speed Week.
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External links George Poteet's Hot Rod Collection - George Poteet's World Hotrod.com Speed Demon online Speeddemonbook.com George Poteet: An Interview with the Famous Hotrodder & Speed Record Racer onallcylinders.com George Poteet and Speed Demon at 2018 Detroit Autorama Classiccarnews.com