Rules: Pro Modified

Rules

Updated June 22/2021

West Coast Pro Modified Rules

CLASS OVERVIEW:
Pro Mod is designed for production vehicles and is the quickest and fastest door class. Entries have the option to run either a small block or big block engine combination. All entries are permitted the use of dual power adders.  All engine combinations are allowed to use gasoline or methanol fuel.  These Rules have been set to be liberal intentionally to allow all Pro Mod race cars to participate.
Note: This set of class rules is presented to all competitors under the assumption that any modifications not specifically written within these rules shall be deemed illegal, unless the competitor has the expressed written consent from the WCPM Director.

RACING FORMAT:
This class will be run on a min 8 car qualified heads-up field, NHRA Pro Style Ladder on a .400 Pro Tree.

All Published Advanced ET NHRA Safety rules will be in effect.

All Motor:

  • Unlimited cubic inches,
  • No minimum weight

Nitrous:

  • 975ci Max
  • 5.4” bore space max,
    • 911ci-975ci 2450lbs
    • 900ci-910ci 2400lbs
    • Less than 899ci 2350lbs
  • No weight penalty for Lock-up.

Roots:

  • Small Block up to 4.6” bore space max,
    • No O/D limit 2400lbs
  • Big Block up to 5” bore space max,
    • No O/D limit 2550lbs

Screw:

  • C-Screw
    • Small Block 4.6” bore space max,
      • Unlimited O/D 2650
    • Big Block 5.0 bore space max,
      • 70% O/D max 2575
      • 92% O/D max 2675
      • 110% O/D max 2775
  • D-Screw
    • 70% O/D max 2525
    • 92% O/D max 2625
    • 110% O/D max 2725

Whipple:

  • A980
    • 75% O/D max 2550lbs
    • 92% O/D max 2600lbs

Centrifugal/Pro Charger:

  • 5” bore space max
    • 140mm max 2600lbs
  • Non Hemi/481X 24 deg. Conventional head
    • 140mm max 2475lbs

Turbo:

  • Twin Turbo
    • Small Block
      • 4.5” bore space max
        • 98mm 2400lbs
      • 4.6” bore space max
        • 98mm 2500
    • Big Block
      • 5” bore space max
        • 88mm max 2550lbs
        • 94mm max 2600lbs
        • 98mm max 2700lbs
  • Single Turbo
    • Small Block
      • 4.6” bore space max
        • 118mm max 2350lbs
    • Big Block
      • 5” bore space max
        • 118mm max 2450lbs

Weight breaks/penalties:

  • Boosted Big block entries
    • Add 50lbs lock-up
    • Add 50lbs 531ci-600ci
    • Add 100lbs 600ci-670ci
    • Add 50lbs 5.3” bore space
    • Add 50lbs 18-71 Roots
    • Add 50lbs 2 power adders (Nitrous will always be considered the secondary power adder.
    • Minus 50lbs Big Blocks less than 470ci
    • Minus 50lbs gasoline
    • Minus 50lbs Small Block Cast Head/Block

Parity Rule: (Based on race directors discretion)

  • In the interest of creating parity within the class, any car that hasn’t run 3.99 or faster gets a 50lb break. Any entry that breaks into the 3’s will run base weight at the following event, or if a second pass is made at that event. Any pass 3.89 or faster will result in immediate base weight.
  • Any single combination seen to be dominating the field will be subject to weight penalties being added solely to their entry until further notice.

Challenges:

  • All challenges will cost $250, if the car/driver in question passes the challenge, the driver will receive the $250, if the car/driver fails the challenge, they will be disqualified from that round of competition, if it was a qualifier, that round and all previous rounds will be disqualified. In the event that no other qualifiers are available, the driver will be placed in the last qualified position and will not receive any qualifier points or payout. All challenges must happen before the car in question reaches their pit after their run. The driver who fails the inspection chooses a local charity to donate the $250 to.
    • Tracks with-out permanent scales:
      • When no permanent scales are available, a temporary set will be available to set up.
      • +/- 1%
    • Cubic Inch (Under 670ci)
      • Inspection will be performed with a pump.
    • Over Drive
      • Over drive pully combinations will be counted.
      • +/- .9
    • Turbo/Pro Charger size
      • Callipers will be used.
      • +/-2mm

Race Operations:

  • Heads Up, 1/8 mile, Pro 400 tree with auto start, 16 car field, Pro Ladder.
  • Must change lanes every qualifying pass unless requested by track or WCPM official.
  • Elimination lane choice and pair run order will be based of qualified position for 1st round and low et for every round following. Lanes can be changed until the previous pair turns off track.
  • $500 membership fee, Must be paid prior to first round of qualifying.
  • $500 race entry fee, be paid prior to first round of qualifying.
  • Entering two classes with one car in any event is not permitted, including test passes while still in competition, (Unless specifically permitted by track and WCPM officials).
  • Payouts will be as follows
    • #1 Qualifier $500
    • #2 – #8 $350
    • #9 – #16 $250 to any driver that has traveled more than 700km to get to the track.
    • $250 First round loss
    • $500 ¼ Finals
    • $750 Semi Finals
    • $1500 R/U
    • $3500 Win
      • Driver must stage car under its own power to receive round money. Any driver unable to make the call will receive previous round payout.
  • Points
    • Entry/tech = 250 points
    • Qualifying points
      • #1 = 16
      • #2 = 15
      • #3 = 14
      • #4 = 13
      • #5 = 12
      • #6 = 11
      • #7 = 10
      • #8 = 9
      • #9 = 8
      • #10 = 7
      • #11 = 6
      • #12 = 5
      • #13 = 4
      • #14 = 3
      • #15 = 2
      • #16 = 1
    • Elimination points
      • 1st Round Loss = 100
      • 2nd Round Loss = 200
      • 3rd Round Loss = 300
      • Runner Up = 400 (Win 5 – 9 cars)
      • Winner = 500 (9 -16 cars)
    • Driver must stage car under its own power to receive round points. Any driver unable to make the call will receive previous round points.
  • Bonus points
    • WCPM Track Record (Since 2020) = 10 points
    • Compete at every WCPM points race in a given season = 50 points

Qualify #1, Win Event, and break ET or MPH track record at the same event = 10 points