Event Date:10/18/25 at the Waterford Speedbowl

General Rules will be used from the rules at neprotruck.com.  This open event is not a points race for any track or series.  No points funds apply.  Posted awards will be paid out as collected from each participating sponsor.  WTC only acts as an agent between race venues, drivers and owners.  Racing is a dangerous sport and can result in injury or death. These guidelines do not imply safety. Safety is the responsibility of the car owner/crew chief.

ALL RULES ARE PRESENTED AS A GUIDELINE. It is impractical and impossible to list all modifications and infractions. It is our experience that new ones are invented daily. If a guideline does not accomplish it’s goal we reserve the right to modify or add to that guideline without notice. WTC reserves the right to modify, delete amend or update these guidelines. The WTC interpretation is the official interpretation of any guideline or rule.

By applying to this event or participating in it, you are agreeing to abide by any and all WTC rulinigs pertaining to any issue connected to this event. Competitors include owners, drivers, crew members and anyone associated with an entry. The competitor’s only recourse when disagreeing with WTC officials or suffering any loss as a result of participation is to withdraw from the event.

All safety rules pertaining to the driver apparel and helmets, belts, seats and safety gear in general are per the 2025 ProTruck Rules posted at neprotruck.com

ProTruck Open Rules

Tires/Rims:  All teams must run the Hoosier Tires currently legal for the ProTruck Challenge. All tires must be purchased at Hoosier Tires East. 
Left Side : #500 on 15X8 Rims
Right Side #1060 on 15 x 10 rims

No other tires will be allowed to compete in this event.

The competitor agrees that tires may be tested at Blue Ridge Labs. No chemical treatment or any other treatment of any type is allowed. Payouts will not be made until tire testing is complete.  It is understood that chemical testing will require that tire to be destroyed.

Chassis: Three types of Chassis are Eligible for competition in the NPN event.

Type 1: Purpose built ProTrucks excluding Seekonk Metric.  All will have a Truck Style center section Those would include A/B and C Chassis
Type 2: Street Stock Conversion / D: (Must have been previously run as a street stock type race vehicle before converting to the ProTruck body

• Wheel base: 108 – 112 inches   non-conforming add 5 lbs. per ¼ inch outside range
• No Offset: Driveline-Front Clip-Rear Clip– Main frame rails must share the same centerline
• Ground Clearance 4 inches
• Stock Snout or OEM replacement./Johnson  (78-87 G Body)
  • Non- metric or non-OEM add 50 lbs.
  • Lower Control Arm Mounts
    • Must maintain proper location/height in relation to main frame rail
    • Must maintain proper location/height in relation side to side
    • Must maintain proper location/height in relation to the steering box
    • Dropped/raised /relocated snouts add a minimum of 100 lbs
• Weights (At all times)
  • Standard weight penalty
    • 0-5 lbs light  3 position
    • 6 or more – 1 position for every additional 5 lbs light
  • Type 1OEM type Metric 2900 lbs.   –  Max  56.0% Left side –  Min 54% Nose
  • Type 1 OEM type  Non-metric 2950 –  Max  56.0% Left side    Min 54% Nose
  • Type 2 OEM type Metric 2900 lbs.   –  Max  56.0% Left side –  Min 54% Nose
  • Type 2 OEM type Non-metric 2950 –  Max  56.0% Left side    Min 54% Nose
  • Type 2 Non OEM appearance 3050 –  Max  56.0% Left side    Min 54% Nose
  • Type 2 Camaro                               3050 –  Max  56.0% Left side    Min 54% Nose
• Engine Location
  • Centered
• No devices that adjust or limit suspension travel from inside the car
  • Raising of Chassis 3 inches must not raise wheel

Type 3: Seekonk Metric (Newer Style Seekonk Metric Snout Chassis)

• Weight 3070 lbs. Must conform to all rules in the quick reference section of the 2025 ProTruck Challenge rules found at neprotruck.com

Engine Options

• Sealed 602
• Claimer option: As per the 2025 ProTruck Challenge rules listed at neprotruck.com
  • Claimer motors are for sale after the event for $3500
  • Includes unsealed 602 if not run as an open motor
  • Includes 603
    • All aluminum head motors must add 20 lbs per frame rail safely secured on top of snout in front of firewall
    • Lead must be clearly marked and attached
  • Claimer option is only available for teams that have run 7 or more races in 2025 on the $10,000 ProTruck Challenge Tour
• Unsealed 602 / 603  / Open
  • Max Rear Wheel Horsepower 290.0 with 10.0 allowance
  • Open motors subject to post race dyno testing.
  • Steel Head Only
  • No Air Management Spacers
  • Truck owners agree by entering. WTC will impound and transport vehicle to the dyno at Dez Racing Seekonk Ma

Rule Applying to all Trucks

Driveline

• Flywheel and Pressure plate
  • OEM Type // Steel
  • No multi disc
  • Minimum weight for those 2 components 30 lbs
• Drive Shaft
  • Two acceptable hoops for safety
• Transmission
  • OEM Production 3&4 speed

Carbs and Air induction/ Fuel System

• Carburetor
  • Open Motors
    • 4412 2bbl – must pass tour gauges.
  • All other motors any 2 or 4 bbl holly carb
• Air Cleaner
  • Minimum 12 inch / Max 18 inch
  • No air boxes allowed
• Spacers
  • Up to 2 inch / may use (2) 1-inch to get height
• Safe Fuel cell / Fuel cell installation as per 2025 ProTruck Challenge Rules which may be found at www.neprotruck.com
• Fuel / Fuel Pump
  • No additives
  • Block Mounted Mechanical Only
  • Must have line shut off

Cooling

• Radiator
  • Stock appearance and location
  • Coolant must be water (No antifreeze)
  • Must have catch can
    • Overflow must blow on right lower corner of windsheild
• Fan
  • No clutch fans
  • Electric preferred
  • Belt driven may not use plastic, aluminum, carbon fiber, or fiberglass blades.

Brakes

• Stock Single Caliper Steel Pistons only
• Caliper Brackets must be Steel
• Steel Rotors only
• No component other than the master cylinders may increase brake line pressure

Electrical

• Single Battery -12 Volt only
• A Master Battery Kill Switch must be within the drivers reach and clearly marked.
• No cell phones, smart watches, blue tooth devices are allowed in the race car at any time
• No traction control type devices are allowed

Exhaust

• Must use downspouts
• Exhaust that exits through the door
  •  must not exceed a decibel meter reading of 103 @ 50 feet at 3000 rpm.  All door exhaust will be checked .
  • Must run a muffler listed below
    •  Lobak #RCM -25-12-15 or #RCM-30-12m-30
    • Shoenfield Part # sch63030     /  #83030

Rear End

• Axels
  • Steel only
  • Standard design
• No restrictive devices
• Bump stops not allowed
• May not be cambered
• All Trailing arm, Links, must be straight tubular with spherical rod ends or stock
  • Rubberized components are not allowed
  • Addition spring or torque controlling devices are not allowed
• 3 link suspension add 50 lbs. (Does not include Seekonk metric)

Springs (No coil overs)

• Magnetic Steel
• Minimum 5 inch diameter
• Available new on internet for less than $151 dollars
• Front must mount directly on lower control arm.
• Minimum #550 lbs per inch rated

Shock Absorber

• Must mount to lower control arm
• 1 per wheel
• Readily available for $225 online new

Tread width

• Add 10 lbs per ½ inch out of tread width specification
• All except Seekonk Metric
  • Minimum 73 inch / Max 74 inch
• Seekonk Metric
  • Minimum 71 inch / Max 72 inch

Body / Exterior

• Must maintain 4 inches ground clearance
• Numbers
  • must be acceptable to scoring
  • Duplicates will be required to run an additional character.
• External Bars
  • No external protective bars of any type are allowed outside body
  • Rub Rails
  • Only carbonate type made by Five Star (1 per side)
• Hood
  • Required if the car is on track
  • Air cleaner may extend out
    • Max opening 1 inch from edge of hood to air cleaner
  • Two air relief openings may be placed through the forward half of the hood
    • Must be screened or louvered
    • Must not be on same side of hood

Rear deck

• Must be sealed
  
  
• Rear Spoiler Required
  • 10 inch tall extending from fender to fender
  • Any positive angle
  • May (Not mandatory)  have forward extending air management sides
    • Max length forward 20 inches
    • May be same material as spoiler or aluminum
    • Can not be taller than a line extended from the top of the spoiler forward 20 inches that ends on the rear deck
• Windows
  • Polycarbonate Full front windshield required.
  • Side window opening must maintain 17 inch height

Safe driver egress must be maintained