Hilliard 2007 Columbus Winter Championship
1050 lb - Hilliard Twin Class
1. 48 Cubic Inch. It must be a “garden tractor” type engine.
This covers - Kohler Command - Kawasaki - Onan -
Briggs Flat Head - Briggs Vangaurd - Kohler Magnum -
Kohler KT Engines - Generac - Twin Cylinder Only
2. Carb not over 1” venturi.
Re worked factory carb for that engine type permitted.
Commands must be down draft carb.
No 2-barrel carbs. Single butterfly carbs only.
No fuel injection
3. Factory manifold for that engine type.
No homemade.
Commands - No 2-barrel manifolds or fuel injection manifolds
Briggs – you may run 2-barrel – 1” single venturi.
4. 1” spacers permitted.
5. No billet or recast heads.
They must have factory stamping.
6. Valves – Any size allowed.
7. All engines must have billet steel flywheels.
8. Front pulley can be steel or alum.
9. 4 cycle engines only.
10. 26x12x12 tires only.
11. Fuel will be Gas - C-12 [.750 Specific Gravity].
No pressure tanks / no additives.
Fuel will be checked before and after you pull.