VPI Swap Calculator

Engine Swap Vehicle Performance Index Calculator

Use this tool only for cars that have had an engine swap. Start by selecting your vehicle and entering the original and new horsepower values.

How the engine swap rule works

Instructions:

  1. Enter your original horsepower and new horsepower. The calculator outputs the swap points to add to your base VPI.
  2. Engine swaps include the stock long block, stock exhaust manifolds, motor mounts, starter, ECU, and wiring. Any custom adapters required to fit the engine are included, but optional performance parts (for example headers) are not. If you are not sure, email tech@champcar.org.
  3. Maximum swap cost is 2,500 dollars for engine and adapters.
  4. Tech reserves the right to override the formula.
  5. BCCR 4.5.6. Vehicles must use the highest valued model from its generation.

The ChampCar engine swap rule is based on an exponential formula that uses the original horsepower, new horsepower, and the Swap Performance Value (SPV) from the VPI table. All swaps incur a minimum of 50 points, even if there is no increase in horsepower. As you approach the limit of allowed added horsepower, the points increase rapidly. An extra 5 horsepower may not be worth 50 points that you could spend on suspension.

Horsepower reference for most models can be found at www.Edmunds.com or www.automobile-catalog.com. If your car is not listed, contact tech@champcar.org.

For complete details, see the ChampCar BCCR rulebook.

Remember: If you are in doubt about your swap or the correct values to use, email tech@champcar.org.

Swap calculation results

After you select your vehicle and enter horsepower values below, your calculated points and new VPI will appear here.

Input swap information