General As part of NASCAR's unification of the two Camping World Series in 2003, the cars can be either a 105-inch (2,700 mm, which had been used in the former Busch Grand National East) or 110-inch (2,800 mm, which had been used in the former Winston West)
wheelbase. Cambered/off-set rear ends are not allowed. competing in the 2015
Carneros 200 in a Chevrolet SS The car bodies are typically a hand-built steel body, however teams may also use a one-piece composite body. The composite body is a "common" item that may be run as any manufacturer branded car (i.e. only one style of composite body for all four car manufacturers [Ford, Chevy, Dodge, Toyota]). Teams then "brand" the composite body by the grill opening, quarter window openings and the vehicle decal package (head lights, tail lights, etc.). Due to the introduction of the Car of Tomorrow in the NASCAR Sprint Cup Series, many of the vehicles on the series are old Sprint Cup cars. Another popular way to get a complete body is to buy a "cut-off" body from a Nationwide series team and mount it on a chassis. Teams have an option of building their own engines or they may run a specification engine, similar to what is used in many short tracks. Both engines are V8, pushrod, 12:1 compression motors. "Built" motors are built to team specifications using any configuration of pieces as long as it still meets NASCAR specifications. The spec engine is built using NASCAR-Approved pieces that may be purchased from an approved supplier. The engines may be purchased as a kit or pre-assembled. All of the spec pieces are individually encrypted with a barcode for verification and tracking purposes and can be checked during the inspection process with an encryption reader. When the series first started, the cars ran a V6 engine with a maximum displacement and no compression limit . In the early/mid 1990s the V8 engine with a 9.5:1 compression and maximum displacement was introduced to the series as an alternative to the V6 engines. Due to the decrease in popularity of the V6, it was phased out for the 1999 season. When the East and West series rules were combined, the compression ratio changed to 12:1. Cars may use
leaded or unleaded fuel. However, when running in conjunction with one of the three national touring (Truck, Xfinity, Cup) series, unleaded fuel must be used. (left) and Gen-6
Chevrolet SS at
Sonoma Raceway in 2015. On November 4, 2014 at the
SEMA Show in
Las Vegas,
NASCAR president
Mike Helton unveiled a new body style for the K&N Pro Series based on the
Sprint Cup Series Gen 6 models. The new body, developed with Five Star Race Car Bodies, is constructed of a composite laminate blend and designed with easily replaceable body panels, expected to shrink the costs of fabrication dramatically. The body style is eligible for use in both Menards Series competition and
ARCA Racing Series competition, replacing the old Gen 4-style steel bodies after 2015, and the current one-piece composite body after 2016. The Chevrolet SS, Ford Fusion, and Toyota Camry bodies used in Sprint Cup are the basis of the new bodies. No
Dodge option is available with this car. Along with all of ARCA and NASCAR's international series, the Menards Series have
General Tire as their exclusive tire supplier.
Specifications •
Engine displacement: 358 cu in (5.8 L)
Pushrod V8. •
Transmission: 4 speed
Manual. •
Weight: 3,300 lb (1,497 kg) Minimum (without driver). •
Power output: ~650 hp (485 kW) unrestricted. •
Fuel:
Sunoco Leaded or Unleaded gasoline. •
Fuel capacity: 22 U.S. gallons (83.2 L). •
Fuel delivery:
Carburetion. •
Compression ratio: 12:1. •
Aspiration:
Naturally aspirated. •
Carburetor size: 390 cu ft/min (184 L/s) 4-barrel. •
Wheelbase: 105 in (2667 mm)/ 110 in (2794 mm). •
Steering:
Power,
recirculating ball. ==List of champions==