462 mph!
Re: 462 mph!
No longer have a CR500.
07 Yamaha YZ250, 17 Husqvarna 701 Enduro
Get on with riding or get on with dying.
https://www.youtube.com/mojoscojo
07 Yamaha YZ250, 17 Husqvarna 701 Enduro
Get on with riding or get on with dying.
https://www.youtube.com/mojoscojo
On Tuesday, September 20, 2011, in competition during Mike Cook‘s Land Speed Shootout on the Bonneville (UT) Salt Flats, the "Speed Demon" streamliner of George Poteet, Ron Main and Ken Duttweiler Engines clocked the fastest speed ever recorded for an automotive engine powered-vehicle with an entry speed of 452.944 mph, a kilometer speed of 458.189, a mile speed of 457.964 mph and an exit speed of 462.345 mph. The "Speed Demon" is powered by a "Hellfire" 347 cubic-inch smallblock V8 engine using two 82mm Precision Turbochargers burning alcohol to challenge Al Teague's long-standing 406.321 mph FIA record. The unique "Hellfire" powerplant is designed and constructed by Duttweiler.
The 462 mph exit speed, clocked after the end of the flying mile and not valid for FIA records, exceeded the Burkland family's 450 mph exit recorded on September 20, 2000, (using two supercharged nitro-burning Donovan Chryslers), and each intermediate time is now the fastest speed ever clocked by a wheel-driven, automotive-engined machine.
The 457 mph speed through the mile is less than two miles per hour short of the fastest ever clocked by a wheel-driven vehicle which was recorded by the late Don Vesco's 459.021 mph effort in the turbine-powered "Turbinator" on August 12, 2001. Vesco also holds the fastest speed ever clocked for a wheel-driven vehicle with a 470.288 mph exit speed on the same run.
On Monday, Poteet clocked an entry speed of 439 mph, a kilometer speed of 442 mph, a mile speed of 442 mph and an exit speed of 446 mph on the "down run" before breaking a driveshaft and damaging rear differential yoke on the return run, and then Installing the newly designed WEISMANN rear differential which survived the rest of the RECORDS. Unfortunately, the similar scenario played out on Tuesday when the "Speed Demon" damaged its Liberty five-speed transmission and forced driver George Poteet to abort the "return" attempt.
The "Speed Demon" team also made history by breaking into the "Seven-Second Club"; on Monday's 442 mph pass, they clocked an elapsed time for the flying mile of 8.12 seconds but Tuesday's 457 mph blast came with a 7.86 timeslip. The ET for the quarter-mile was 1.504 seconds!
Wednesday's attempt on the FIA-classified A/I/10 record was thwarted by engine damage after which the team decided to change powerplants for Thursday's runs. "We can't be sure how seriously we hurt the 347-inch engine", said co-owner Ron Main from the Salt Flats, "but, by the amount of lost fluids, we can surmise it's pretty bad. We have decided to install our similar 299-cubic inch ‘Hellfire' Duttweiler engine for tomorrow. If we're successful with that engine, we still plan to install our four-cylinder turbocharged Dodge engine for an attempt on that record this week, as well."
The team's 299-inch "Hellfire" V8, another Duttweiler creation, uses the same drive train and Precision Turbos. The smaller engine clocked a blazing 434 mph during the 2010 Shootout and, Main adds, "that was recorded while running right against the rev-limiter". The four-cylinder engine is a 162 cubic-inch version, (with a single Precision turbocharger), which screamed to 390 mph in 2010 to be come the fastest non-V8 engine in history. "We've built quite a bit more power into the four-cylinder Dodge for this year", reported Main, "so we'd really like to see what it can do now".
Using the 347-inch "Hellfire", the "Speed Demon" set the SCTA C/Blown Fuel Streamliner record during the 2011 SpeedWeek event recording an average speed of 390.709 mph while, for the third consecutive year, earning the Hot Rod Magazine trophy for the fastest mile clocked during the meet, (421.009 mph). On a subsequent 416.539 mph effort, Poteet earned the fastest outright speed of SpeedWeek with an exit speed of 426.910 mph. Using the 299-inch "Hellfire" V8, the "Speed Demon" set the D/BFS record in 2010 at an average speed of 404.562 mph and, using the four-cylinder Dodge engine in 2008, the Poteet-Main-Duttweiler team set the F/BFS record at an average of 343.494 mph.
Thursday UPDATE ---
Using a smaller 299 cubic-inch version of Kenny Duttweiler's twin-turbocharged "Hellfire" V8 engine, the "Speed Demon" of George Poteet and Ron Main recorded an entry speed of 436 mph, a kilometer speed of 441 mph, a mile speed of 441 mph and an exit speed of 445 mph. The effort was made against the team's own record of 363.673 mph in the FIA's class A/I/9.
Unfortunately, driver George Poteet endured yet another day of frustrating transmission breakage which ruined the team's attempt at the required "return" run to reset the official record.
With the team's trailer depleted of transmissions for the V8 engines, Poteet and Main will install Duttweiler's single turbocharger-equipped 162 cubic-inch four-cylinder Dodge engine which has clocked over 390 mph on previous one-way runs and set the F/BFS record at an average speed of 343.494 mph.
The 462 mph exit speed, clocked after the end of the flying mile and not valid for FIA records, exceeded the Burkland family's 450 mph exit recorded on September 20, 2000, (using two supercharged nitro-burning Donovan Chryslers), and each intermediate time is now the fastest speed ever clocked by a wheel-driven, automotive-engined machine.
The 457 mph speed through the mile is less than two miles per hour short of the fastest ever clocked by a wheel-driven vehicle which was recorded by the late Don Vesco's 459.021 mph effort in the turbine-powered "Turbinator" on August 12, 2001. Vesco also holds the fastest speed ever clocked for a wheel-driven vehicle with a 470.288 mph exit speed on the same run.
On Monday, Poteet clocked an entry speed of 439 mph, a kilometer speed of 442 mph, a mile speed of 442 mph and an exit speed of 446 mph on the "down run" before breaking a driveshaft and damaging rear differential yoke on the return run, and then Installing the newly designed WEISMANN rear differential which survived the rest of the RECORDS. Unfortunately, the similar scenario played out on Tuesday when the "Speed Demon" damaged its Liberty five-speed transmission and forced driver George Poteet to abort the "return" attempt.
The "Speed Demon" team also made history by breaking into the "Seven-Second Club"; on Monday's 442 mph pass, they clocked an elapsed time for the flying mile of 8.12 seconds but Tuesday's 457 mph blast came with a 7.86 timeslip. The ET for the quarter-mile was 1.504 seconds!
Wednesday's attempt on the FIA-classified A/I/10 record was thwarted by engine damage after which the team decided to change powerplants for Thursday's runs. "We can't be sure how seriously we hurt the 347-inch engine", said co-owner Ron Main from the Salt Flats, "but, by the amount of lost fluids, we can surmise it's pretty bad. We have decided to install our similar 299-cubic inch ‘Hellfire' Duttweiler engine for tomorrow. If we're successful with that engine, we still plan to install our four-cylinder turbocharged Dodge engine for an attempt on that record this week, as well."
The team's 299-inch "Hellfire" V8, another Duttweiler creation, uses the same drive train and Precision Turbos. The smaller engine clocked a blazing 434 mph during the 2010 Shootout and, Main adds, "that was recorded while running right against the rev-limiter". The four-cylinder engine is a 162 cubic-inch version, (with a single Precision turbocharger), which screamed to 390 mph in 2010 to be come the fastest non-V8 engine in history. "We've built quite a bit more power into the four-cylinder Dodge for this year", reported Main, "so we'd really like to see what it can do now".
Using the 347-inch "Hellfire", the "Speed Demon" set the SCTA C/Blown Fuel Streamliner record during the 2011 SpeedWeek event recording an average speed of 390.709 mph while, for the third consecutive year, earning the Hot Rod Magazine trophy for the fastest mile clocked during the meet, (421.009 mph). On a subsequent 416.539 mph effort, Poteet earned the fastest outright speed of SpeedWeek with an exit speed of 426.910 mph. Using the 299-inch "Hellfire" V8, the "Speed Demon" set the D/BFS record in 2010 at an average speed of 404.562 mph and, using the four-cylinder Dodge engine in 2008, the Poteet-Main-Duttweiler team set the F/BFS record at an average of 343.494 mph.
Thursday UPDATE ---
Using a smaller 299 cubic-inch version of Kenny Duttweiler's twin-turbocharged "Hellfire" V8 engine, the "Speed Demon" of George Poteet and Ron Main recorded an entry speed of 436 mph, a kilometer speed of 441 mph, a mile speed of 441 mph and an exit speed of 445 mph. The effort was made against the team's own record of 363.673 mph in the FIA's class A/I/9.
Unfortunately, driver George Poteet endured yet another day of frustrating transmission breakage which ruined the team's attempt at the required "return" run to reset the official record.
With the team's trailer depleted of transmissions for the V8 engines, Poteet and Main will install Duttweiler's single turbocharger-equipped 162 cubic-inch four-cylinder Dodge engine which has clocked over 390 mph on previous one-way runs and set the F/BFS record at an average speed of 343.494 mph.