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MAKING THE SWITCH: WHAT DOES IT TAKE TO CHANGE A SPRINT CAR FROM DIRT TO ASPHALT ?
 by Debbie Shipherd

The traveling NCMA sprint club is unique as it is the only wingless carbureted sprint group to race on both dirt and asphalt tracks. Here is a brief explanation of what it takes to change, following the club's rules. These are the basic, and least costly ways to convert. There are other things allowed to change a car, but then one must follow pavement chassis rules. Please note that club drivers and crews will help interested drivers with pavement tire loans, advice for converting, as well as basic set up. Also, the later additions of  Sprint Car Chassis Technology by Steve Smith and Jimmy Sills have sections on pavement racing, which can be very helpful.

  A. BASIC REQUIREMENTS
     1. Asphalt tires :
The first time, right rear must be the club approved McCreary, the other three corners can be any pavement tire. The second race, both the right rear and the right front must be McCreary tires. The third race, right front and both rears must conform to regular club tire rules.
   2. Overflow catch tank for radiator
   3. Window nets required on both sides
   4. Four wheel brakes:

Steel front rotors are highly recommended.

B. ADDITIONAL NORMAL CHANGES MOST MAKE
 (Highly recommended but not required)
 1. Belly Pan (for safety reasons)
 2. Changing Offset
The maximum allowed is 43" from the center of the frame to outside sidewall of tire.
3. Lowering the chassis
4. Torsion Bars
These are generally about one step stiffer than what most run on dirt ( 1025-1050)
C. OPTIONAL
 1. Hutchins restraint device
Some drivers use them on dirt, as well. Altamont required it last year when under NASCAR sanction, but has since changed that .
2. Shorter pitman arm
  
   The club has set up the pavement rules so that minimum changes are necessary, which also helps keep the cars more evenly competitive without major expenses.
Whether on dirt or pavement, drive safe and have fun!

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