| UNLIMITED ALL STAR RULES FOR 2006 |
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UNLIMITED ALL STARS BASIC ENGINE AND WEIGHT RULES
1. Engines:
A. Any type two-stroke cycle engine or engines, no limit to modifications.
B. Any type four-stroke cycle engine or engines, no limit to modifications.
2. Minimum Weight/Maximum Displacement:
A. Rotary valve or Reed valve Two-Stroke Cycle Engine or Engines, 230 lbs plus one
pound for each cc or fraction of a cc. Multiple engines or cylinders are permissible.
210cc maximum total displacement.
B. Flat Head Four-Stroke Cycle Engine or Engines, 190 lbs plus one pound for every
3c or fraction of a cc. Multiple engines or cylinders are permissible. 466cc
maximum total displacement.
C. Piston Port, McCulloch or US820 (West Bend) Two-Stroke Cycle Engine or Engines,
170 pounds plus one pound for every cc or fraction of a cc. Multiple engines or
cylinders are permissible. 210cc maximum total displacement.
D. Overhead Cam (OHC) Four-Stroke Cycle Engine or Engines, 245 lbs plus one
pound for every 2cc or fraction of a cc. Multiple engines or cylinders are permissible.
265cc maximum total displacement.
E. Overhead Valve Push Rod (OHV) Four-Stroke Cycle Engine or Engines, 220 lbs
plus one pound for 2.5cc or fraction of a cc. Multiple engines or cylinders are
permissible. 446cc maximum total displacement.
F. Forced Induction and Nitrous Oxide. If a kart is equipped with some type of
supercharger, turbocharger, or nitrous oxide system, add 15 lbs for each cylinder that
is served by the system.
G. Mixed Engine Type in Multiple Engine Situations. The minimum wight for the engine
corresponding with the higher weight will be imposed.
H. Fuel. There are no fuel restrictions except that no illegal substance or substances
may be used as fuel or as a fuel additive.
3. Calculating Displacement/Declaring Weight:
A. The bore will be measured with dial calipers and the stroke with a two or three inch
travel dial indicator.
B. The following formula will be used for calculating displacement;
BORE X BORE X STROKE X .7845 X 16.39=CC of engine. (this assumes that the
bore and stroke were measured in inches. The 16.39 is a conversion factor from
cubic inches to cubic centimeters.
C. Always round up to the nearest whole cc when calculating minimum weight.
D. Competitors must declare their weight and display it next to their front number in such
a manner that the scale person can easily see it.
4. Karts with Transmission:
A. These karts that have a transmission that allow the drive ratio to be changed while the kart is in
motion.
B. On tracks designated as 1/8 mile in length or shorter, the transmission may be used without any
restriction.
C. On tracks longer than 1/8 mile in length, some sort of device must be provided to prevent the drive
ratio from being changed while the kart is in motion.
D. This regulation applies to kart commonly referred to a shifter kart. It also applies to karts that are
equipped with torque converters or any other type of device that allows the drive ratio to be
changed, either manually, or automatically while the kart is in motion.
1. Engines:
A. Any type two-stroke cycle engine or engines, no limit to modifications.
B. Any type four-stroke cycle engine or engines, no limit to modifications.
2. Minimum Weight/Maximum Displacement:
A. Rotary valve or Reed valve Two-Stroke Cycle Engine or Engines, 230 lbs plus one
pound for each cc or fraction of a cc. Multiple engines or cylinders are permissible.
210cc maximum total displacement.
B. Flat Head Four-Stroke Cycle Engine or Engines, 190 lbs plus one pound for every
3c or fraction of a cc. Multiple engines or cylinders are permissible. 466cc
maximum total displacement.
C. Piston Port, McCulloch or US820 (West Bend) Two-Stroke Cycle Engine or Engines,
170 pounds plus one pound for every cc or fraction of a cc. Multiple engines or
cylinders are permissible. 210cc maximum total displacement.
D. Overhead Cam (OHC) Four-Stroke Cycle Engine or Engines, 245 lbs plus one
pound for every 2cc or fraction of a cc. Multiple engines or cylinders are permissible.
265cc maximum total displacement.
E. Overhead Valve Push Rod (OHV) Four-Stroke Cycle Engine or Engines, 220 lbs
plus one pound for 2.5cc or fraction of a cc. Multiple engines or cylinders are
permissible. 446cc maximum total displacement.
F. Forced Induction and Nitrous Oxide. If a kart is equipped with some type of
supercharger, turbocharger, or nitrous oxide system, add 15 lbs for each cylinder that
is served by the system.
G. Mixed Engine Type in Multiple Engine Situations. The minimum wight for the engine
corresponding with the higher weight will be imposed.
H. Fuel. There are no fuel restrictions except that no illegal substance or substances
may be used as fuel or as a fuel additive.
3. Calculating Displacement/Declaring Weight:
A. The bore will be measured with dial calipers and the stroke with a two or three inch
travel dial indicator.
B. The following formula will be used for calculating displacement;
BORE X BORE X STROKE X .7845 X 16.39=CC of engine. (this assumes that the
bore and stroke were measured in inches. The 16.39 is a conversion factor from
cubic inches to cubic centimeters.
C. Always round up to the nearest whole cc when calculating minimum weight.
D. Competitors must declare their weight and display it next to their front number in such
a manner that the scale person can easily see it.
4. Karts with Transmission:
A. These karts that have a transmission that allow the drive ratio to be changed while the kart is in
motion.
B. On tracks designated as 1/8 mile in length or shorter, the transmission may be used without any
restriction.
C. On tracks longer than 1/8 mile in length, some sort of device must be provided to prevent the drive
ratio from being changed while the kart is in motion.
D. This regulation applies to kart commonly referred to a shifter kart. It also applies to karts that are
equipped with torque converters or any other type of device that allows the drive ratio to be
changed, either manually, or automatically while the kart is in motion.