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  2. Holbay Engineering - Wikipedia

    en.wikipedia.org/wiki/Holbay_Engineering

    Holbay Engineering was a small family run British engineering company specializing in engine modifications and race tuning. Although they enjoyed much success during the 1960s and 1970s with their competition race engines, they are best remembered today for their work on the Rootes 1725cc OHV engines as used in the Hillman Hunter GLS and Sunbeam Rapier H120.

  3. World Racing Group - Wikipedia

    en.wikipedia.org/wiki/World_Racing_Group

    World Racing Group, Inc. (WRG) is a licensing, sanctioning and promotional organization aligned with oval dirt track auto racing. Through its World of Outlaws and DIRTcar brands, WRG supports individual races and racetracks, and also operates national touring series.

  4. Rajo Motor and Manufacturing - Wikipedia

    en.wikipedia.org/wiki/Rajo_Motor_and_Manufacturing

    The first design was the Model 30 which had 4 exhaust ports and one intake port all on the right side of the head. The Model 31 had two intakes on the right and four exhaust on the left. The Model 35C, first known as the "Improved Rajo Valve-in-Head" and later as the Model C had two intakes and three exhausts on the right.

  5. Bill Jenkins (drag racer) - Wikipedia

    en.wikipedia.org/wiki/Bill_Jenkins_(drag_racer)

    He led development of GM's new splay-valved cylinder heads for the Chevrolet small block V8 engines, utilized in the new Pro Stock Truck category in 1998. He fitted the splay-valve heads in a 358 cu in (5.87 L) engine, used by Larry Kopp to win the 1998 Winston drag championship, and by 1998 national event winners Tim Freeman, Brad Jeter, Johns ...

  6. Front engine dragster - Wikipedia

    en.wikipedia.org/wiki/Front_engine_dragster

    None of these four-wheel designs bore fruit; the development of tires designed specifically for drag racing made four wheels unnecessary. In keeping with the austere nature of a dragster, the heavy cranking motor and battery needed to start the engine were two of the items removed to save weight, requiring that the dragster be push-started.

  7. Cylinder head porting - Wikipedia

    en.wikipedia.org/wiki/Cylinder_head_porting

    Cylinder head porting refers to the process of modifying the intake and exhaust ports of an internal combustion engine to improve their air flow. Cylinder heads, as manufactured, are usually suboptimal for racing applications due to being designed for maximum durability. Ports can be modified for maximum power, minimum fuel consumption, or a ...

  8. Modified racing - Wikipedia

    en.wikipedia.org/wiki/Modified_racing

    Modified stock car racing, also known as modified racing and modified, is a type of auto racing that involves purpose-built cars simultaneously racing against each other on oval tracks. First established in the United States after World War II , this type of racing was early-on characterized by its participants' modification of passenger cars ...

  9. Howe Racing Enterprises - Wikipedia

    en.wikipedia.org/wiki/Howe_Racing_Enterprises

    Howe Racing Enterprises was founded by former racing drivers Ed Howe. His son, Chas, also a former driver, now runs the business. His son, Chas, also a former driver, now runs the business. Both drivers competed frequently in the American Speed Association National Tour as well as other oval racing series.

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