07/12/2023
2024 BUMPER SWAP MINI Demo Derby Rules
Twisted Metal Motorsports
General Rules
1: There will be no stretching or bending of any rules or you will be asked to cut or load up and go home!
2: You must pass inspection within 3 times through or you will not be permitted to run.
3: A 12“ x 12“ roof sign is recommended. It cannot strengthen the car in anyway.
4: Cars must be stock unless modifications are stated in the rules. Cars must have functioning brakes at all times on at least one axle. No painting of the frames, inside of body of the car, or underneath of the car and inside of the trunk.
5: A helmet, seat belt, and eye protection must be worn at all times on the track.
6: If it doesn’t say you can do it, don’t do it.
7: Any controversies or protests must be brought up during the drivers meeting. We have the right to reinspect, cut, or drill any car at any time. If you are caught breaking the rules you will forfeit all winnings and/or prizes you are due. If you stretch a rule, you will lose that rule.
8: All airbags, glass, plastic, and interior must be removed before arriving to the event.
9: Any aftermarket parts must be approved by Robby Crittendon (859-393-5703). You must call and submit pictures for approval. Parts that are not approved before the derby are not permitted to run.
10: No painting of the frames, inside of the body of the car, or underneath of the car and inside of the trunk. This includes overspray. If found with paint within those areas, the car will not even be inspected.
11. All trailer hitches and braces must be removed.
12. Batteries must be moved to the passenger front floorboard. They must be properly
secured and covered.
13. Patching and rust repair will be permitted only if cleared by an official.
14. Officials’ decisions are final! All cars are subjected to re-inspection at any time.
15. If the car is found to have plate on the frame or body that the rules do not allow the car
will not be permitted to run. There will be no option to fix this problem.
16. If you hammer/shape/weld on the frame in any manner not covered in the rules you will
not be able to run. There is no fixing this.
17. You have 1 minute to make an aggressive hit. After 1 minute that car is disqualified. That
is 1-minute total. An aggressive hit is solely at the discretion of the officials
18. You are not permitted to hit anyone in the driver’s door. If you do, you are disqualified. If
you use your driver’s door to take advantage of this rule, the car that hit you is not
disqualified.
19. You may not get out of your car for any reason during the heat until you are out.
20. You are only permitted to have 1 fire in your car. This will result in a disqualification.
21. No sandbagging, teaming, or holding. Any of these will result in a disqualification. You can not pin to win.
Bumper swap mini
The rules below are not guidelines, this is a street stock event meaning that all unspecified areas of car building below are required to remain OEM as intended from manufacture in regards to material, placement and structural integrity of both frame/unibody and body panels.
ANY FRAME PLATING OR FRAME STUFFING OUTSIDE OF WHAT IS STATED IN RULES WILL BE AN AUTOMATIC LOAD
ALLRUST REPAIR MUST BE PRE-APPROVED OR MEET THE FOLLOWING REQUIREMENTS:
A MAXIMUM OF 18-20 GAUGE SHEET METAL OR OEM FLOOR MAY BE USED. MAY OVERLAP PAST RUSTED AREA 1-INCH ONLY. RUST REPAIR IS MEANT TO RESTORE CAR TO OEM, NOT STRENGTHEN. IF DEEMED EXCESSIVE IT WILL BE REMOVED.
Car Building
1.This class is for FRONT WHEEL DRIVE CARS ONLY maximum of 113” wheelbase
2.Cars must remain stock unless specified in these rules
3.Aside from dash and front seats, interior must be stripped entirely. MUST remove air bags and the charges. Do not just set them off remove them.
4. Simple wiring harness allowed. Hard wiring factory fans are permitted. No oil coolers or tr**ny coolers. Factory tr**ny lines may be looped.
5. All doors may be wired or chained 8 spots per door max. IF WIRING YOU MAY WELD 1” HOLED WASHERS FOR WIRE TO RUN THROUGH. IF YOU PREFER TO WELD, YOU MAY HAVE (2) 4”X4” X ¼” MAX PLATES PER VERTICAL DOOR SEAM AND 1 PER TOP OF DOOR. CHOOSE ONE OPTION
The Driver's door may be welded solid. Or full door plate ¼ thick with 3’’ door seam overlap.
6.Deck lids may be wired or chained in 8 spots max. IF WIRING YOU MAY WELD 1” HOLED WASHERS FOR WIRE TO RUN THROUGH. You may tuck the trunk in 90 degrees. Wiring can go to the floor in the spare tire area but cannot wrap around the frame. Spots of wire or chain must be distinct 10 separate spots, no intertwining spots. IF YOU PREFER TO WELD YOU MAY HAVE 6 TOTAL 4”X4” X ¼” PLATES ON SEAMS TO SECURE TRUNK, CHOOSE ONE OPTIONS
7.Hood may be wired in 8 spots max. IF WIRING YOU MAY WELD 1” HOLED WASHERS FOR WIRE TO RUN THROUGH. Sheet metal of hood to sheet metal of fender only
8. Absolutely No creasing or wedging on rear of car
9. FRAME MAY BE SHORTENED TO THE FURTHERMOST FORWARD POINT OF CORE SUPPORT. CORE SUPPORT MAY NOT BE REMOVED OR REPOSITIONED. Do not push this. If running a honda please call for specific instructions on how to extend the frame for bumper mounting.
10. BUMPERS: A SMW light flat, A robinson, RUTZ 10 GAUGE, DEC equivalent are permitted( ALL OF THESE BUMPERS ARE TO REMAIN 10 GAUGE-1/8” AND ARE LIMITED TO A 3” POINT MAX. NO GUSSETS PERMITTED. As an alternative, any OEM bumper. May be seam welded, no loading
You may have a 6”x6” plate flat to the front of the frame for mounting purposes. you may not add shocks to a car that doesn’t come factory with bumper shocks. All cars that came with a bumper shock must keep the factory shock in the factory manner. 1 ( PER RAIL) 4” X 4” ¼” PLATE MAY BE USED ON THE TOP OR OUTSIDE WHEEL FACING FRAME TO ATTACH BUMPER TO FRAME. This 4×4 plate can only be attached to the unibody frame and the back of the bumper. This plate cannot in any fashion be attached to the subframe, k member etc
Front- 2 strands of double braided nine wire may go around the bumper one time and around core support. ONE LOOP. No criss-crossing of strands. Cannot go through the hood.
Rear- 2 strands of double braided nine wire may go around the rear bumper and then through the trunk lid. Where it goes through the trunk lid can be no further forward than half the trunk lid. No criss-crossing strands
11.You may have 2 spots of 9 wire in the windshield area or two 3” strapping roof to cowl
12.Battery may be moved to the inside of the car but does not have to be. It is STRONGLY recommended that if the battery is under the hood, it must be spray foamed in place. If moved to the cockpit of the car, no wood battery boxes must be secured tight and a steel battery box is recommended.
13.If gas tank is in front of rear axle, it is recommended that it be left in the factory position under the car
14.If the gas tank is moved from under the car it must be replaced with a METAL tank in the rear seat/rear floor board area. Tank must be mounted securely to the floor. You may not use ratchet straps to secure the tank. You may NOT mount a factory tank inside the car. Any fuel system we feel is unsafe will not be allowed to run.
15.Tires may be doubled and tubed any tire allowed no bead locks. Lip protectors are permitted. Nothing may be welded other than a 2″ lip protector max and a simple valve stem protector. Rear wheels only can be solid.
16. You may run a seat bar. No larger than 4″x4″, from B pillar to B pillar. If needed to accommodate drivers seat, you may use one 8″x12″1/4″ plate welded to each B pillar to weld bar to, so that seat may be slide back. If you prefer to have the gas tank suspended off the rear sea bar it is permitted but there must be at least 6” between rear sheet metal in packing tray and gas tank. No full gas tank protectors.
If you desire to run a simple 4 point cage you may but must not exceed 6” material and must remain 6” away from the floor. A shifter bar is permitted. Door bars may not exceed the rear kick panel.
17. Aftermarket shifters are permitted
18. headers are permitted
19. Spring risers are permitted
20. Any front or rear tires and wheels but no beadlocks.
CARS MUST REMAIN STOCK UNLESS STATED IN THESE RULES
ALL JUDGES DECISIONS ARE FINAL
ALL CARS FRESH OR PRE RUN GET (4) TOTAL 4″X4″ FIX IT PLATES. MUST BE ON SUBFRAME OR UNIBODY FRAME. 1/2″ BEAD OF WELD. PLATES MAY BE PARALLELOGRAM BUT MUST MEET THE FOLLOWING REQUIREMENTS. ALL 4 SIDES MUST MEASURE 4″ LONG AND SIDE TO SIDE 4″ TOP TO BOTTOM 4″ AND THE TWO FURTHERMOST POINTS MUST MEASURE 7″.
If you have any questions with the rules, CALL FIRST. Do NOT assume anything, do NOT play the gray areas. The official’s decision is final. Call Robby Crittendon at 859-393-5703 for building questions.