10/02/2026
2026 OPEN WHEEL A MODIFIED RULES
Motor Rule:
1.Any IMCA or UMP legal chassis allowed.
2. No aluminum blocks unless running the CTC525.
3. GM 604 Crate allowed.
4.One piece spoiler optional with max height 3β.
5. Nitrous oxide, nitrous methane, propylene oxide or any type of additives will not be permitted.
6.No electronic traction control devices.
Weight Rules:
1.UMP A, H or M Stamped RR tire-2450 lbs.
2.UMP G60 or IMCA KK Stamped RR tire-2400 lbs.
Tires:
1.Tire softeners and/or chemicals designed to alter the chemical characteristics of the tire and/or the tire surface will not be permitted.
2. Any track official can confiscate a tire at any time during any event to be evaluated and analyzed including verification using a tire durometer. Tires may also be submitted for further chemical analysis. Tires must conform to the benchmark set forth via the manufacturer.
3.Tire grooving is allowed. You are allowed to grind, or
needling. Siping is permitted on M-30 and M-60. Just no chemicals.
Body:
IMCA or UMP body rules.
Rules Allowed: USRA/USMTS & TOMS.
All cars must follow the below rules for spoiler, weight, tires,
and RPM Rev-Limiter no matter what above rules they
Choose.
-Spoiler: 5β
-Maximum Weight: 2450 lbs.
-Tires: See Notes Below
-RPM Rev-Limiter: 8000 rpm Maximum
Class Notes: Stamped parts are not required. Right side
beadlocks are allowed. Any Sanctioning you choose may run
any of the following tires: Hoosier G60 Stamped or
Unstamped. No mixing and matching of tires.