ALLISON, Iowa – A heavy late-afternoon rain shower wiped out any hope of the Dart Iron Man Challenge happening at the Highway 3 Raceway in Allison, Iowa, Thursday night.

The race at the Southern Iowa Speedway in Oskaloosa was also rained out Wednesday along with Tuesday night's main event at the Marshalltown Speedway.

The event at Oskaloosa has been rescheduled for Monday, Sept. 20, and the Allison event is slated for Tuesday, Sept. 21.

The Marshalltown race will not be rescheduled.

The Dart Iron Man Challenge Will accompany the popular USMTS Modifieds at both events, with a similar qualifying format including heat race passing points to determine the “B” Main and “A” Main line-ups.

Each driver’s ten best points-earning performances will count toward the final year-end standings with a $1,000 top prize for the series champ and the tenth-place finisher earning $100.

In addition, each race will award national points in the USRA Karl Chevrolet Stock Car division of the American Racer USRA Weekly Racing Series where the national champion will earn $700.

A USRA license is not required to compete and/or earn points in the Dart Iron Man Challenge, but only USRA-licensed drivers will be eligible for points funds in either the Dart Iron Man Challenge or American Racer USRA Weekly Racing Series.

USRA rules will apply at each event. Drivers are permitted to utilize the Rochester, Motorcraft or 1¾ Holley 4412 open carburetor but must be run with the Edelbrock Performer (Part #2701) or Weiand X-CELerator (Part ##7541) intake manifold. These intakes must be stock (no porting allowed). The 4412 carb must be stock and must be 1-11/16. For conforming to IMCA rules, the 350 carb is allowed with a 2,800-pound weight rule. Any driver running the 604 crate motor is allowed the 4-barrel carburetor.

Production and camera crews will be on location at both events as they record the USMTS action for the upcoming Dirt Knights TV show. Dirt Knights will be an on-going dramatic series of one-hour programs that will air twice a week for 13 weeks. The much-anticipated TV show is set to debut in January of 2011 on the VERSUS cable network - the fastest growing cable sports network in the nation, which reaches more than 75 million households.

To learn more about the USRA, visit www.usraracing.com or call 515-832-6000. You can also follow the USRA on Facebook, MySpace and Twitter.

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USRA TITLE SPONSOR: American Racer Racing Tires.

USRA OFFICIAL SPONSORS: AwesomeRacesuits.com, Dart Machinery, Intercomp, Karl Chevrolet, Karl Performance Parts, Kevko Oil Pans & Components, Nitroquest, RACEceiver, RHS – Racing Head Service.

USRA PARTICIPATING SPONSORS: Allstar Performance, Boubin Tire & Automotive, BRODIX Cylinder Heads, Day Motor Sports, SpeedNet Direct.

USRA CONTINGENCY SPONSORS: COMP Cams, Eibach Springs, Forty9Designs.com, Hooker Harness, Marsh Racing Wheels, QuickTime Inc, Racing Optics, Real Racing Wheels.