With a wheelbase of 90 inches, 13-inch tires, and a high-tech coilover suspension system, including a three-link rear system, these front-engine cars are first class racing machines. Even the brake system is high-tech, including an adjustable brake bias system with steel braided lines to the wheels and a gas sampling hose. These cars carry an automotive-type powertrain with a Toyota Celica or Winters quick-change rearend.
This series has run since 2000, with about 150 cars built and raced on both road courses and ovals. With distributors in several states, the fiberglass-bodied Pro Challenge cars have run in Florida, Georgia, Alabama, Virginia, and Ontario, Canada.
Challenger Dirt Late ModelsConsidering the huge interest in national Dirt Late Model racing, it's not surprising that a miniature version of the model would make its appearance. And that has happened with the DRT Race Cars' Challenger car. This 31/44 version of a real Dirt Late Model looks and drives just like the real item.
With a wheelbase of 83 inches and a 1,050-pound, ready-to-race weight, the car is highly responsive and fast. If this seems like the real thing, that's because the chassis and body are manufactured through GRT, a respected full-size Dirt Late Model producer. GRT produces the suspension parts and accomplishes the actual car assembly.
It's possible to buy a chassis with bumpers and mounts for $2,450, and a complete turnkey car can be bought for a reasonable $14,750.
There is no spec engine specified for this series-any stock four-cycle motorcycle engine from 600 cc-1,200 cc is legal-but a 750cc engine is included in the turnkey version. The powertrain is chain-driven.
You're not going to believe the suspension system on the Challenger design. There is a fully adjustable four-bar system with an adjustable panhard bar, along with upper and lower control arms. Additionally, it has caster and camber wheel adjustment capabilities and rack-and-pinion steering.
Presently, the body, which is fabricated completely of 0.040-inch aluminum, is available only in the Monte Carlo style.
The Challenger cars are currently in the formative stage with only exhibitions in 2003. Challenger officials, however, indicate that there will be enough cars to carry out some racing this season in Arkansas, Kentucky, and Tennessee
Thunder Roadster CarsReverting back to the past like the Legend and Dwarf cars, the Thunder Roadsters are exclusively from 600 Racing Inc., and step back to an earlier design of open-wheel racer.
The tires are not covered with fenders, but are not completely exposed either, for they are mostly constrained within the outer confines of the molded fiberglass body. There is also a GP Thunder Roadster version for SCCA road racing, which carries full fenders.
The sealed Yamaha 1,250cc Blitz engine, equipped with a fan and a remote oil filter, is the required powerplant for this class.
With a wheelbase of 96 inches and a much higher weight than the other motorcycle engine powered designs, these cars weigh in at 1,500 pounds, including the driver. Also, the 15-inch tires are 2 inches larger in diameter than the other car designs. They are stopped by four-wheel disc brakes.
Suspension is coilover independent on the frontend and straight coilover on the rearend. On the front, there are double A-arms with adjustable Bilstein shocks. There are also rear trailing arms and a roll-adjusting panhard bar. These sophisticated machines are priced at $14,995, with the GP versions costing $1,000 more.