The carburetor rule is intended to allow WESCAR competitors to purchase a legal and competitive carb over the counter. Only minimal modifications are allowed to prepare this carb for oval racing. If your carb does not meet all of the specifications listed below, it is the responsibility of the driver or car owner to ensure the carb is WESCAR legal.
 

Choke Horn

• Must be completely intact and untouched
• Choke plate, choke shaft and all other choke related linkages and components may be removed

Air Bleeds
 

• Factory type air bleeds only
• No screw in air bleeds

Main Venturi/booster Venturi
 
 

No modifications to the main venturi or booster venturi are allowed Booster venturi must be standard Holley airfoil type Booster venturi must measure 0.385 +- 0.010 ID Booster venturi must measure 0.615 +- 0.010 OD Main venturi casting mark must be visible on apex of main venturi Must pass Holley venturi tool

Carb Body
 

• May mill mating surface for metering block square
• No other milling or grinding allowed

Throttle plate/base plate
 
 
 

Must be stock bore 1.6875 +- 0.010 Must have factory brass Phillips screws – untouched Swaged part of throttle plate screw must be intact Throttle shaft and plate combined thickness must be 0.200+-0.010 May have holes drilled in throttle plate Must pass Holley base plate tool

 

Float Bowl
 

• Must have factory float bowl
• May use oval track float
• May use h/d needle and seat

Metering Plate
 

• Must be factory production metering plate (no performance types)
• No external mixture adjusters allowed

Jet side
 

• 2 holes for jets only, no other modifications allowed
• Jets may be changed

Power valve side
 

• May plug power valve.
• May change power valve.
• No grinding or modifying of metering plate
• No extra holes allowed.
• No extra emulsion holes allowed in main well (only 4 factory holes TOTAL)
• SEE PICTURE FOR CLARIFICATION

 

* If you have any questions, please check with the tech crew