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: February 28, 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
Eliminations are based on a handicap start using the NHRA index system; breakout does not apply.
This event will utilize 2021 posted NHRA National Indexes.
COMPETITION INDEX CONTROL (CIC)
In an attempt to control runaway index situations in Competition Eliminator, CIC will be in effect during eliminations. Any contestant running -.50 or quicker during eliminations (not during qualifying or time trials) will have his or her index adjusted by the amount he or she exceeds -.50 for the following round of eliminations.
In cases where two cars of the same class are paired, the race is conducted on a heads-up basis, regardless of any CIC considerations.
Note: Event CIC will be a straight 1-to-1 index reduction.
SINGLE RUNS
In situations where a driver is making a single run, he or she is considered the winner once he or she stages and receives the start signal or is declared the winner by the official starter. If a competitor crosses the boundary line on a single run, the elapsed time is voided for lane-choice determination.
WDN COMP. ELIMINATOR INDEXES CAN BE FOUND HERE: https://doorslammernats.com/wp-content/uploads/2021/03/WDN-Comp-Elim-Indexes-2021.pdf
Stock/Super Stock Combo
1/4 Mile – 32 Car Field
(17+ Cars, 32-car field, 33+ cars, 64 car field)
NO ENTRY LIMIT (NMCA Stock/Super Stock Rules)
$10,000-to-win
S3 is a handicap break-out eliminator based off of all NHRA and IHRA, Stock and Super Stock, classes. Stock / Super Stock Combo, will qualify based off NMCA indexes of January 1, 2021. These indexes and weight factors will remain in effect without change during the entire race season. All 1955 to current as listed in the NHRA and IHRA 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 NMCA indexes of. These indexes and weight factors will remain in effect without change during the entire race season.
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 / IHRA 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 (NHRA or IHRA) 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.
RULES
All rules and classification will be based off the current year NHRA and IHRA 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 WDN 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 (6.39 = 1/8 mile) or quicker, or 135mph or faster at a NHRA member track.
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. NHRA/IHRA competition license mandatory at an IHRA Member Track.
WDN STOCK / SUPER STOCK INDEXES CAN BE FOUND HERE: https://doorslammernats.com/wp-content/uploads/2021/03/WDN-Stock-Super-Stock-Indexes-2021.pdf
Note: It is ultimately the competitor’s responsibility to familiarize themselves with the NMCA 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 NMRA and 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.