Concrete Clash 2026
Schedule
Sat, 14 Feb, 2026 at 07:00 am to Sun, 15 Feb, 2026 at 11:45 pm
UTC-07:00Location
Firebird Motorsports Park | Chandler, AZ
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Four drag racing clubs will unite at Firebird Motorsports Park for an exciting two-day competition. Visiting organizations West Coast NA and AFX will demonstrate their expertise on the 1/8-mile track, while Arizona's own AZ Grudge Racing and Cordes Performance Racing present both 1/8 mile and 1/4-mile racing classes, highlighting top local talent. Those interested in challenging WCNA or AFX can purchase a tech card and participate, with cash buy-ins available at each club’s booth in the pit area. For racers wishing to compete locally, AZ Grudge Racing (1/8 mile) and CPR’s 1/4-mile index offer ideal opportunities. Additionally, the Open Test N Tune class allows participants to test new setups. West Coast N/A 10.5
1/8 Mile Heads up (Naturally Aspirated)
Race Format: Heads up / Double Elimination
Light: Pro Tree
Pairing layout: Random chip draw each round (Unlimited Bye Runs)
No Time (Timing boards turned off)
Buy in Cost: $100
Official Rules
Pass NHRA Tech for ET & MPH
Must be Naturally Aspirated. No nitrous, turbo, supercharger.
Door Cars & Trucks
Steel Roof & Quarters – GM Corvettes excluded
Small block 2700 lbs w/ 29.5 x 10.5 or smaller, no W’s.
Big Block @ 2950 lbs w/ 28x10.5 or smaller no W’s. Equivalent size radial and 275 Pro ok.
Big Block @ 3250 lbs minimum w/ 29.5x10.5 is allowed
American Nostalgia West
1/8 Mile (5.80-7.0) or ¼ Mile (8.75-11.00)
Heads up / Single elimination
Light: .400 Pro Tree w/ Auto Start
Timing Boards: On
Pairing layout: Random Chip Draw each round
Buy in Cost: $150
Official Rules
No tube frame cars
No power adders, Nitrous, turbo, blower
Period correct hood scoops
Some exterior lettering paint/vinyl
Ride height at least 5” fender to ground
The manufacturer's engine is in the car.
For example: Ford in Ford, GM in GM, and Mopar in Mopar
No fuel injection, throttle stops, or carb plate controls
Back half allowed
No electronics - tranny brake allowed, no delay box
Deep stage is ok at your own peril
No sandbagging, be near your qualifying time
Must be a paid member
26” minimum front tire
Dial to .250 ¼ mile and .100 ⅛ mile
One Bye allowed per race
8.75 - 11.00 ¼ mile
5.80 - 7.00 ⅛ mile
AZ Grudge Racing: Small Tire, Big Tire, Small Tire Gangster (5.30 index), Street Muscle
1/8 Mile
Heads up / Single elimination
No buy backs
Light: ProTree
Small Tire, Big Tire, Small Tire Gangsters: .400 Pro Tree w/ Auto Start
Street Muscle: .500 Pro Tree w/ Auto Start
Pairing layout: Random Chip Draw each round
Cash Buy in Cost
Small Tire: $200
Big Tire: $200
Small Tire Gangster (5.30 index): $150
Street Muscle (6.0, 6.5, 7.0, 7.5, 8.0, 8.5 indexes): $100
Official Rules
Must Pass NHRA tech for ET and MPH
Small Tire: 28x10.5 non ‘W’ or Smaller Tires
Small Tire: Must have steel roof and quarter panels
Big Tire: Door cars only
One Bye allowed per race
Quarter Mile Heads up Index classes
Race format: Single Elimination (Saturday and Sunday)
Light: .500 Pro Tree
Timing Boards: On
Pairing layout: Random chip draw each round (Cannot get ‘Bye’ run twice)
Buy in Cost: $100
Official Rules
Cars, Trucks, and Motorcycles
MUST Pass NHRA Tech for ET & MPH
Any tire permitted
Choose Index (.5 increments) before 1st round
Breakout = Loss
No Throttle Stops
No Delay boxes
Trans Brake authorized
No switching indexes after round 1 chip draw
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Where is it happening?
Firebird Motorsports Park, 20000 S Maricopa Rd, Chandler, AZ 85226-5206, United StatesEvent Location & Nearby Stays:
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