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Rules For
Full-size, and Mini Classes
Revised 11/26/2011
This is how we want to see the hump plates

Keep in mind that the size requirements on the hump plates
The sizes pictured is for the 77 and newer coil spring cars
LEAF CONVERSION CLASS RULES
General
******** You must pass inspection within 3 times through inspection or you will not be allowed to run ********
1. Any American-made sedan or station wagon No Imperials. If car is painted black a 12" x 12" roof sign is mandatory.
2. Helmet, seat belt, and eye protection must be worn at all times. Any controversies or protests must be brought up during the drivers meeting.
3. Any questions call first If it doesn't say you can, don't do it. Cars must be stock unless modification is stated in the rules. No painting of the frames. a 12" x 12" roof sign is recommended. Judges decision's are final. All cars are subject to re- inspection at any time before, during, or after the event No refunds on illegal cars.
4. All glass, plastic, and interior must be removed before arriving to the event. Cars must be stock unless modifications stated in rules. We have the right to RE-INSPECT, DRILL, OR CUT any car at any time. If you stretch a rule you will loose that rule.
5. Original gas tank must be removed and replaced with a boat-type tank or fuel cell. Moved inside of car behind drivers seat but no further back than rear axle. Batteries must be moved to passenger side floor board and securely fastened.
Body I Cage
1. Two 8" X 8" inspection holes must be put in all deck lids one on each side of deck lid within 2" of trunk strapping in center of trunk. Trunk lids must be factory for make and model of car IE: GM to GM ford to ford no pre 1980 deck lids permitted on 80 and newer cars.
2. You may weld, wire, or bolt doors, trunk lids, and l or
tailgates. If you wire you may use 8 double strands of #9 wire all may go around
bumper or frame You may weld, wire, or bolt only. Strapping used for welding may
not be stair stepped no
excessive overlapping permitted. strapping may be ¼” x 3" maximum. Deck lids may
have two 1" piece of all thread from the floor pan to the deck lid they may
Attach to frame by welding the all thread to the frame no more than ½ ( HALF )
way down the side of frame and must be straight up and down, On wagons these may
go from the floor pan to rear roof pillars not the roof. You may add 3 bolts per
wheel well these bolts can be in wheel well only.
3. No body seam welding will be permitted. Doors can be welded on outside of body only. On pre-ran cars the doors may be repaired back to stock. Rust repair is limited to floor boards and roofs only.
4. You may have a window bar or wire in windshield and rear window if using metal it can be no thicker than 3/8" and no wider than 3" You may use 2 x 2 pipe. not solid. These may not touch the rollover bar. They can be welded to roof no more than 6" from the window area. And welded to deck lid no more than 6"at the rear window area Metal used for this may not exceed 6" in length on roof or deck lid.
5. You may use a floating gas tank protector that comes off the back bar but it can not be wider than 24" The gas tank protector or holder may go all the way back to the sheet metal. If the protector is wider than 24" it will not be allowed to run. Gas tank protector I holder can be welded or bolted to rear sheet metal or package tray with 2 - ½ " X 4“ bolts or 2 -- 3" welds.
6. You may have 6 bolts on the hood to keep it secure, bolts may be 1" in dia. The front 2 may go all the way through core support You may use a 2 x 2 spacer through the core support this may be welded to top of frame and top and bottom of core support only. You may also use a 4" x 4" x ¼ plate to weld to top side of frame on the front two body mounts these can weld no farther than 2" on the frame behind the body mount bolts. 1" bolts max.
7. Hoods must be open for inspection. (12" x 12" hole over carburetor)
8. Cars may not be smashed flat If cars are tucked the rear quarter panels on both sides of cars must be 6" higher than the top of the bumper.
9. Body mounts must remain in place or a 1" gap between body and frame with a stack of washers or spacer of some kind may be used nothing bigger than 3" x 3" permitted NO EXCEPTIONS cars without a space will not be permitted to run.
10. You can add a piece of angle (4" x 4" x ¼"max.) to top of the core support but can be No longer than 32" no other metal permitted on core support. No other metal permitted to be welded to core support.
11. You may have a cage surrounding the drivers compartment with a roll over bar. Bars 6" diam. Max. must be sheet metal to sheet metal only. The dash bar must be 5" from firewall This will be strictly enforced. The bar behind the seat can sit no further back than where the kick panel meets the bench seat and must be at least 6" off the floor. . No cage components can be farther back than where the kick panel meets the bench seat. Roll over bar and rear down legs are cage components No center bar in cages permitted. You may use 2 down legs to the frame from the rear bar down to frame these must run straight down no angling of the down legs permitted. For 2012 You May use 1 not both A You can have kickers from the front dash bar to the top side of frame behind A arms. 2X2 square tubing Or 2” pipe only no other material may be used they must be within 2" of A arm. OR B A kicker permitted from dash bar to distributor protector This may not weld or bolt to Dist. Protector.
Frame I Bumpers
1. Trailer hitches and braces must be removed.
No plating, pinning, heat treating, stuffing the frame of any kind. Do not paint frame. NO WELDS ON FRAME MAY EXCEED A SINGLE PASS NO WEAVE PASSES OR BUILDING THE WELD UP WILL BE PERMITIED.2. NO FRAME CREASING or hammering PERMITTED. You can notch or crease rear frame this is to help rear of car roll not to strengthen the frame. Frame welding is limited to front and rear bumper areas Frame seams from firewall forward may be welded top side only. On 79 and older cars you may square off the front of the frame to hard nose the car no shortening of the frame is permitted
3. Any year bumper permitted. All bumper seams may be welded, Front bumpers may be loaded bumper must be a factory car bumper No homemade bumpers DEC bumpers are permitted. No spacers of any type permitted between the front bumper and the frame. The bumper on the rear of the car must be factory no adding of metal to bumper on rear of car will be permitted. Openings in bumper may be closed out. You may use ¼" plate to weld from bumper to frame 2 sides and only can overlap the frame no more than 2". Bumper shocks must appear stock Must be round pipe or factory shock no square tubing will be permitted for shocks and may not be further than 1 0" inside of frame and be no bigger than 2 inches in dia. You may weld shock to frame you can cut factory frame seam open and weld to shock no creating extra seams on top or bottom of frame permitted.
4. On the front frame they must be 25" from front of coil pockets on bottom
of frame to end of the frame If a frame section
needs to be replaced or repaired (rust) you must call first. If the frame has
damage in the rear the back 2 body bolts may be
moved no more than 6" from factory location. On pre-ran cars if the frame is
shortened in the rear and bumper replaced the
bumper shocks may not be located closer than 6" from hump plate.
5. You may put (4) - ¼" x 3" x 3" plates on pre-ran cars that have frame
damage there must be a 1" gap between fix it plates
There must be visible damage to have the fix it plates If we can not see damage
by looking at the area these plates will have to be completely removed. If a
seam has came apart you may re-weld up to 6" of frame but that will count as 1
of the 4 plates ( no plates bigger than ¼ “ x 3" x 3" allowed if plates
are larger they will have to be completely removed) THIS Will BE STRICTLY
ENFORCED.
6. Angles for cross member can't be longer than 5" and must be within 12" from factory location.
7. Body bolts and washers may be changed (1" dia. Bolt max, 3" washer max.) Must start and stop in stock location
8. Bumper can not be lower than 15" or higher than 22" from bottom of bumper. Frame may not be lower than 14".
9. For coil sprung cars you may use a hump plate they may be ¼" X 6" X 22" centered in the hump they will be measured from the top center of the hump and must start no lower than the center of the frame. Hump plate must be at least 2" from rear end housing. On new model GM's (metrics) you may use a ¼ " X 6" X 30" hump plate to be measured the same way. On leaf spring cars you may use a ¼" X 6" X 11" hump plate to be measured the same way. These hump plates may contour the frame or run straight across hump. Hump plate must remain flat plate no bending of this over the top or bottom of frame.
10. You may clip pre-ran cars with a single butt weld with no metal added must use same make and model of frame IE: ford to ford gm to gm No hybrid frames permitted on fords you can not clip a 02 and older with an 03 and newer no exceptions or vice versa.
11 You may cut factory seams at the box and re-weld to tilt the front of new style fords no metal may be added. All factory holes in frame must remain open no welding these holes shut permitted.
12. On new style cars with the aluminum cradles you may switch these out with
80 and newer ford or GM steel cradles they must be put in like there factory
counterparts only using the factory brackets no other metal may be added. They
must be in factory location and can not be moved forward. You may use a 3"
spacer from the bottom of the frame to lower A-arm where the spring goes you may
not alter frame in any manner other than attaching factory brackets with a
single bead of weld. You
can not make homemade spring pockets. All factory holes in front of A arms must
be open. The 4 holes in front of a arms behind bumper must remain open. On 03
and newer fords you can not shorten the front of the frames.
Engine / Transmission
1. Engines may be chained in with 4 chains standard 3/8" chain max. these chains may be no longer than 16" and no more than 2 chain links may be welded to the engine cradle behind Motor Mount2 chains permitted to frame In front of A-Arms (1 per side) 2 Chain links welded to frame Welds for this may not exceed a continuous 3” weld. . Chains must attach to engine.
2. Motor of choice is permitted. Distributor protectors are allowed, Nothing that attaches to engine can be wider than the stacks I.E dist. Protector, engine cradles ect or be used to strengthen cars.
3. No transmission protectors or braces of any kind permitted NO SKID PLATES PERMITTED". No braces of any kind will be permitted behind distributor protector. Oil pan and transmission pan may be plated the plate used may be only 1” wider than the pan they are welded to they may not connect in any way.
Suspension
1. You may modify tie rods. Valve stem protectors are permitted. A-arms must remain in stock configuration. Any tire permitted. Rear trailing arms may be Home made No bigger than 2 x 2 square tubing or pipe.
2.Upper A arms may be welded down with a ¼" X 2" X 2" piece of steel on front and back side of upper a arm and you may plug weld the center of the A Arm. lower A-Arms may not be welded. You can change out the new style A-arms For old style ones. Cars do not have to bounce. Solid suspension is allowed.
3. Coil springs in rear may be welded wired or chained to rear end.
4. You may use rear end of choice. ¾ ton rear ends are permitted. Rear end protectors may be used but may not be used to strengthen car in any way. leaf spring cars may replace broken springs with factory ¼ " leaf springs only. No more than 7 springs allowed and must have a 2" stagger and mounted in factory location
5. Idler arm must be bolted factory to frame no bolts will be permitted all the way through the frame. Sway bar may be welded to bottom of frame in the factory location you may use a 1 ½ " X 4” bracket or a 2" square tubing or pipe to weld to sway bar to attach to frame.
6. You can change coil spring to leaf spring set ups. Leaf springs: Seven (7) leafs per side. No bigger than ¼” thick and no wider than 2 ½” Spring all may be same length main spring may be anywhere in stack. Four (4) spring clamps per side no bigger than ½” No taping of springs. Suspension may be locked or welded solid all thread may be used for shocks Rear spring shackles: front shackles may not exceed 6” in length rear shackles may be 3” wide ¼” thick and 6” long. Front shackle may be welded to the frame only half way up the frame the rear shackle may be welded all the way to the top of the frame all thread for shocks may go all the way through the floorboards with a 3” washer the floorboards have to be cut. Springs may not be on edge or inside of frame behind rear axle. On any leaf spring cars you may use an ¼” x 6” x11” hump plate to be measured
FULL· SIZE STREET STOCK RULES
80 & newer1. Any American-made sedan or station wagon 1980 and newer
2. Helmet, seat belt, and eye protection must be worn at all times. Long sleeves and Long pants required.
3. Any controversies or protests must be brought up during the drivers meeting.
4. Any questions call first
. If it doesn't say you can don't do it. Cars must be stock. No painting of the frames. If the car is black it must have a 12" x 12" roof sign.5. Judges decision's are final
. All cars are subject to re-inspection at any time before, during, or after the event.6. All glass, plastic, and interior must be removed before arriving to the event
.7. Any car motor of choice is permitted. NO DISTRIBUTOR PROTECTORS. NO ENGINE CRADELS. NO MOTOR PROTECTOR. NO KICKERS. MUST USE STOCK MOUNTS. Can have ONE chain per side, going down TWO length welded 3/8 chain to cradle under engine not the frame.
8. Trailer hitches and braces must be removed.
9. A 14" x 14" inspection hole must be put in all deck lids. Deck lids MUST be in original position. NO TUCKING. Drivers Door may be welded solid outside seam only. All other doors must be wired shut.
10. Original gas tank must be removed and replaced with a boat-type tank or fuel cell. Moved inside of car behind driver's seat but no further back than rear axle. Batteries must be moved to passenger side floor board and securely fastened.
11. No interior seam welding will be permitted. Repairing sheet metal is limited to where the battery box and gas tank and drivers area of the floor boards of the car.
12. NO FRAME WELDING. You may weld the bumper and bumper shock there must be at least a 1“ gap between bumper and frame if using a factory bumper shock. Bumper may be welded directly to frame but the bumper shock must be removed completely. No adding metal
. .1980 and NEWER bumpers only will be permitted. No tilting frames will be permitted13. Hood- wire ONLY. 8 double strand of #9 wire 2 may go around bumper and or frame. Hoods must be open for inspection. (12" x 12" hole over carburetor). Deck lids may be wired same way no welding permitted.
14. Angles for cross member can't be longer than 5" and must be within 12" from factory location.
15. Tie Rods MUST BE STOCK No gas tank protectors.
16. Factory body bolts may be changed to ½” bolts you must use factory rubber and bushing spacer and there must be a 1 “ gap between body and frame
.17. Rear coil springs may be wired or chained. No solid suspensions. All suspension components must remain factory stock. No modifications will be permitted. Cars must bounce.
18. Front coil springs must remain stock. You can use screw-in spacers. Leaf spring cars must remain factory springs. NO EXCEPTIONS! You cannot change coil spring to leaf spring set ups.
19. Car must set level bumpers can not be higher than 18” to bottom of bumper
20. Any stock 5 bolt rear end permitted. No rear end protectors. Must use STOCK trailing arms.
21. Cars must be stock. We have the right to
RE-INSPECT, DRILL, OR CUT any car at any time.22. No cages and or bars permitted in car.
23. NO OTHER MODIFICATIONS MAY BE MADE TO CAR UNLESS THEY ARE STATED IN THE RULES ABOVE
IF YOU STRETCH A RULE YOU WILL LOSE THAT RULE.NO WELDS ON FRAME!
The rules and / or regulations set fourth herein are designed to
provide for the orderly conduct of racing events and to establish minimum
acceptable requirements for such events. These rules shall govern the conditions
of all events, and, by participating in these events, all participants are
deemed to have complied with these rules. NO EXPRESS OR IMPLIED WARRANTY OF
SAFETY SHALL RESULT FROM PUBLICATION OF OR COMPLIANCE WITH THESE RULES AND / OR
REGULATIONS. They are intended as a guide for the conduct of the sport and in no
way a guarantee against injury or death to a participant, spectator or official.
The race director shall be empowered to permit minor
deviation from any of the specifications herein or impose any further
restrictions that in his opinion do not alter the minimum acceptable
requirements. NO EXPRESSED OR IMPLIED WARRANTY OR SAFETY SHALL RESULT FROM
ALTERATION OF SPECIFICATIONS. NO interpretation or deviation of these rules I
left to the discretion of the officials. Their decision is final.
The Management of
"SMASH IT" DEMOLITION DERBY, INC.
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