CACC Rule Change Proposal
RCP-2026-6281

For Hill Climb:

Cars competing in Max: For weight reducing cosmetic modifications that are not otherwise allowed in max are allowed for Hill Climb events with the following rules:

Common weight reduction modifications done for hill climb cars include things like headlight deletes, turn signals, horns, and dashes. Although there are allowances for lexan windows in max, windshields and front windows fall outside of those rules.

These modifications would otherwise move the car to unlimited. If the competitor wants to stay in Max but continue to have such modifications, ballast can be added in trade, equivalent to double the weight difference of the modification in question.

As an example: A car otherwise legal for max has headlight deletes. The resulting weight reduction of removing the headlights and adding a headlight blanking panel is 2kg of weight difference. That competitor can stay in Max if they add 4kg of weight in the form of weight ballast.

These ballast rules are separate to the minimum weights Max class. Even if the car is above the minimum weight for the class, ballast must be used in trade for these otherwise not class legal modifications.

Ballast can be added in the form of lead bricks and/or gym weights assuming they are securely mounted. This ballast can be installed anywhere in the chassis.

It is very common for hill climb cars to have modifications that would immediately put them into unlimited. Most of these modifications are considered to be inconsequential for performance and competitors feel that their cars do not fit in the unlimited category. Giving competitors an avenue to have these modifications and stay in the lower max class has been deemed important. Adding ballast to the car equivalent to double the modification weight gives people the ability to do the modification but it is incentivised to be properly max class legal. The thought is that by having the ballast be double the modification, it is not a dramatic hit on performance, allows the modification, but it is of no benefit over being otherwise class legal. The upside to the ballast is it can be placed anywhere on the chassis, aiding in weight distribution but not contributing to outright performance.

The reason for this being independent of class minimum weights is that most competitors are above the minimum weights as they are. This will promote doing modifications that are class legal over those that are not.