Track Raceiver radios are mandatory for all regular classes. Frequency is 454.000
Black Rock Speedways Big Block / Small Block Modified Rules
This race is open competition, but NOT a “run-what-ya-brung” race.
-Conventional center-steer, Northeastern-style dirt modifieds only; no special cars.
-Body must be DIRT legal, *except sail panels allowed, 65" max. height from ground.
-Any brand, any compound tire, right rear maximum 92"x13".
-Maximum one 4 bbl or 2 bbl carburetor only, no multiple carbs, fuel injection, turbo or supercharger.
-Cast iron engine block only, must be V8.
-Cast iron, steel or aluminum heads.
-No SB2 or similar NASCAR-type specialty heads.
-Racing or pump gasoline only.
-362 to 467 cubic inches (big blocks & big small blocks) - 2500 tsp
-361 cubic inches and less - 2400 tsp - tsp = track scale pounds
-361 CI and smaller can run Methanol and must weigh 2500lb.s
*Also just a reminder for all 602 CRATE Sportsman - Your engines must have all GM seals in correct spots.
We have tried our best to put together a package that will allow the greatest number of cars
(DIRTcar & ROC) to be legal as well as competitive. Last year, this race had a good mix of big and
small blocks, and neither seemed to have an advantage over the other.