6.1 Carburetor   Requirements

• WTC has gauges for the following carburetors:
  (To add or approve any carburetor the team requesting the new carb, if approved must purchase and donate the appropriate gauges requested by WTC)
  • Holly 4412 500 cfm 2bbl
  • Holly 0-6895 390 cfm
  • HP 0-80507  390 cfm 

Engines Option 1  (Sealed 602)

• Any 4 bbl
• May use Holly 4412 500 CFM 2 bbl carburetor and receive 25 lb weight  reduction
  • No HP or XP Carburetors
  • Must use 2 throttle return springs
  • Choke plate and shaft may be removed
  • The following items may be changed
    • Jets
    • Power valve
    • Accelerator pump
    • Pump cam may be changed
    • Discharge nozzles
  • Throttle Plate
    • Screws may be machined flush with shaft
    • Idle holes may be drilled
  • Warning: Carburetor may be rejected without reason.
                  It must be able to pass all WTC gauges
                  Do not alter it and you will have no issues

Engines   Options 3,

• Open motor 325 cu. – 360
  • Must use Holly 4412 500 CFM 2 bbl carburetor or 390 4bbl carburetor
    • There is no 2bbl weight break for open motors
    • No HP or XP Carburetors
    • Must use 2 throttle return springs
    • Choke plate and shaft may be removed
    • The following items may be changed
      • Jets
      • Power valve
      • Accelerator pump
      • Pump cam may be changed
      • Discharge nozzles
    • Throttle Plate
      • Screws may be machined flush with shaft
      • Idle holes may be drilled
    • Warning: Carburetor may be rejected without reason.
                    It must be able to pass all WTC gauges
                    Do not alter it and you will have no issues.
      
• Option 5 Claimer Engine (Subject to change)
  • No carburetor rules at this time.
  • May use Holly 4412 500 CFM 2 bbl carburetor and receive 25 lb weight reduction
  • Individual motors may have specific carb and intake rules applied to maintain fair and equal competition.

6.2 Spacer Plate

• 1 inch spacer place allowed
  • Must be approved at inspection.
  • Can be refused without reason
  • No modifications
  • No tapered spacers
  • No air management spacers / Super suckers
  • No spacers over $150.00
  • Max gasket thickness 0.075
    
• 6.3 Air Cleaner
  • 12 inches minimum / 18 inches maximum
  • 5 inches maximum height
  • Must be totally covered by hood
  • No Air boxes are allowed
  • Max air opening between hood and windshield is width of the air cleaner used.
    Rear edge of hood must maintain contour of windshield.
    Rear edge may have 4 inch Max vertical opening.

6.4 Fuel Systems

• Fuel Pump
  • Stock type
  • Block Mounted
    
• Fuel Lines
  • Steel braided lines recommended
  • No cooling devices of any type
  • Lines must be steel conduit of passing through interior
  • Only a steel fuel filter may be used.
  • The use of a fuel check valve (Vacuum type) and standard check valve on vent is mandatory.
    • Vacuum check valve manufactured by Fuel Safe.
      
• Fuel Shut off
  • Must be within reach of driver
  • Must be accessible for safety personnel without leaning into truck
  • Clearly marked off and on
    
• Fuel
  • ONLY approved fuel allowed
  • No additives
    
• Fuel Cell   (New for  2018)
  • Dates (Expiration – Fuel cells / Bladders within 6 years)
    •  It is highly recommended that the fuel cell bladder be no more than six (6) years old.
  •  Gas cap must be painted white with the car number on it for identification. 
  • 22 gallons maximum.
  • must be mounted to the center of the chassis
  • Minimum ground clearance 7″
  • encased in steel container of no less than 22-gauge steel.
  • Minimum of (3) steel braces
    • under fuel cell going from front to back of cell
    • two braces on top for support.
  • crash bar must be mounted at rear of vehicle to protect fuel cell 1 ¾” tubing.
    • Crash bar must utilize four vertical braces.