Rules & Procedures

The CTECH World Doorslammer Nationals presented by JEGS [WDN] will go down in history as the richest and most celebrated doorslammer drag racing event of all-time, as well as one of the most significant since the inception of Pro Stock and Pro Mod. On the afternoon of Sunday, March 7th, 2021, the WDN champions will be crowned and rewarded with historic prize money across the board. The WDN Pro Stock and Pro Mod race winners will also be immortalized on the cover of DRAG ILLUSTRATED and presented with a custom championship ring.

Taking a dramatic departure from traditional races, WDN Pro Stock and Pro Mod competitors will be afforded four quarter-mile shakedown runs on Friday, March 5th and Saturday, March 6th. Drivers will then be escorted to the starting line at 11AM on Sunday, March 7th, to participate in a random drawing for first-round pairings and their individual places on the 16-car professional ladder. In the event of a bye-run, the driver who draws the No. 1 will be afforded a bye. 

By-and-large the CTECH World Doorslammer Nationals presented by JEGS abides by the rules, race procedures and safety measures standardized by the National Hot Rod Association [NHRA]. 

NHRA technical officials will be on-site performing thorough inspections for both professional categories contested.

Updated: January 29, 2021

Pro Stock

1/4 Mile – 16 Car Field – Heads Up

$75,000-to-win

NHRA performance and safety rules apply to all entries. All cars will be fueled by tech officials during eliminations. Cars will be scaled after each round. 

Pro Mod

1/4 Mile – 16 Car Field – Heads Up

$50,000-to-win

NHRA performance, weight minimums and safety rules apply to all entries.

Factory Shootout

1/4 Mile – 16 Car Field – Heads Up

$10,000-to-win

NHRA performance, weight minimums and safety rules apply to all entries.

Top Sportsman

1/4 Mile – 32 Car Field

$10,000-to-win

NHRA performance and safety rules apply to all entries.

Comp. Eliminator

1/4 Mile – 16 Car Field

(17+ Cars, 32-car field, 33+ cars, 64 car field)

NO ENTRY LIMIT

$10,000-to-win

NHRA performance and safety rules apply to all entries.

Stock/Super Stock Combo

1/4 Mile – 32 Car Field

(17+ Cars, 32-car field, 33+ cars, 64 car field)

NO ENTRY LIMIT

$10,000-to-win

This is a handicap break-out eliminator based off of all NHRA Stock and Super Stock, classes. All NHRA/IHRA Stock and Super Stock cars are invited to attend but will qualify against current NHRA indexes.

Stock / Super Stock Combo, will qualify based off NHRA Indexes as of January 1, 2021.

All 1955 to current vehicles, as listed in the NHRA Stock Car Classification Guide, permitted.

QUALIFYING INFORMATION, LADDER TYPE & TREE

All run qualified field, NHRA sportsman ladder, and .500 full tree.

The class will qualify based off NHRA indexes. These indexes and weight factors will remain in effect without change during the entire race.

64 cars or less will be laddered first round.

65 or more cars will be random paired first round and laddered second round based off of first round eliminations.

All dial-ins must be under the currently posted indexes for all NHRA Stock and Super Stock class combinations.

All qualifiers in S/SS must have a valid elapsed time recorded to be placed into eliminator competition.

Competitors will scale during qualifying and after completion of any “heads-up” elimination run.

During eliminations when identical class combinations are paired the dial-in for both competitors will be based off of the faster qualified car and bumped by 1 tenth of a second, break-out still in effect. Example: Heads up C/SA in round #2. The quicker C/SA car ran 10.90et in qualifying, the heads up dial would be 10.80 for the heads up round & breakout still applies for the pair.

All rules and classification will be based off the current year NHRA rules and classification guide with the exception of; Fuel Check will not be a technical requirement. All NHRA Safety rules will be in effect. No modifications, which alter the car from factory stock, are permitted unless they are specifically allowed in NHRA / IHRA rules, or as authorized by the WDSN rules committee.

CHASSIS

All vehicles must have a chassis that meets the guidelines set by SFI for their respective speed and elapsed time. A valid NHRA serialized Chassis sticker is mandatory for any car running 9.99 or quicker, or 135mph or faster at a NHRA member track.

APPEARANCE

1. Class Sponsor: Decal must be located on the passenger’s side lower portion of the windshield.

2. Class & Competition Numbers: Numbers must be easily visible/legible and located on the front, back, and both side windows.

CREDENTIALS

A Valid state or government issued driver’s license beyond a learner/s permit level mandatory for cars running 10.00 or slower. A Valid NHRA competition license is mandatory for cars running 9.99 or quicker, at an NHRA Member Track.  

Note: It is ultimately the competitor’s responsibility to familiarize themselves with the class requirements as well as all NHRA safety requirements. The competitor agrees they bear the ultimate responsibility when it comes to safety and how it complies with the NHRA rule books. The competitor also agrees that no one else other than the competitor is in the best position to know about how their particular race car has been constructed and how to safely operate it.

Pro 632

1/8 Mile – 16 Car Field

$10,000-to-win

Note: It is ultimately the competitor’s responsibility to familiarize themselves with the class requirements as well as all NHRA safety requirements. The competitor agrees they bear the ultimate responsibility when it comes to safety and how it complies with the NHRA rule books. The competitor also agrees that no one else other than the competitor is in the best position to know about how their particular race car has been constructed and how to safely operate it.