2023 Waupaca County Fair Demo Derby

150th Anniversary Bonuses to be announced.

Sunday August 27th@ 6PM
Entry 60, Pits 20

5 Feature class Heats

Power Wheels
Stock Fullsize cars+ Nose bleed Championship!
Gutngo Fullsize Trucks, No HDs or Super Duties
Gutngo Midsize cars
Unified Rules Multi Minis, Vans, Pickups, and SUVs
Gutngo Compacts


***If it isn't in the rules you cannot do it! Ask 1st!
Any year automotive vehicle 1960-2013 is allowed, Except the following 1974 and older Chrysler Imperials, 2003 and newer Ford's, Mercury's or Lincoln's.
**Safety: Functioning seatbelts, Helmets, Eye Protection, Long pants, sturdy shoes or boots are mandatory. Racing Suit recommended .** All air bags and charges must be completely removed before arriving to track for competition. Vehicles must have operable brakes.
**Preparation: All glass, headlights, tail lights, chrome, fiberglass header panels, carpeting, antennas, hubcaps, wheel weights, and garbage must be removed before coming to the track for competition. Trailer Hitches must be completely removed.


(Max height is 21” from ground to bottom of bumper)

Any completely factory front bumper is legal. Can be reinforced internally and skin welded down, and patched. No adding to factory dimensions of bumper when reinforcing, All bumpers may be hardnosed to frame.
*Aftermarket bumpers must follow specific dimensions. No Amish Point style bumpers. 6” by 6” outside diameter by 3/8” thickness maximum. No wider than car, No sharp edges on ends of bumper. If using a point, it must be gradual and total width from backing plate to tip is no more than 10”. Strictly enforced.


Any factory automotive front bumper bracket is legal, or choice of using a plate 8” x 4” x 3/8” can be used. 1 side of frame only. All brackets may be welded completely around a maximum of 8” back from center of core support hole. Same rule also applies to welding bumper shocks to side of frame only.
CORE SUPPORT: (3/4” Threaded rod max, no welding rod, 4 nuts max)
No welding on support. 3” maximum core support spacer. Spacer must be free floating and not welded to frame/bumper or core support. Core support can have 2 spots to front bumper, 9 gauge wire (4 loops), 3/8” chain max 30” long, or 2 -¼” plates by 3” wide x 24” length max, no more than 1 LINK” welded on bumper and support.


Factory radiators, or aftermarket aluminum radiators are legal. No auxiliary coolers. Water only, no antifreeze. You may use expanded metal protector, or condenser in front of radiator. Bolted in 4 spots to core support only. (3/8) bolts Protector follows dimension of radiator. Cannot be used to reinforce anything, just protect the radiator.


Fenders may be trimmed. 3 3/8” bolts with 1” washers to bolt outer and inner skin of fender.


Must be automotive


Automotive A-arms can be interchanged. A-arms cannot be altered from factory or reinforced in any way. You may add screw in component to run over the counter part numbered ball joints. No aftermarket ball joints. No aftermarket spindles. You may use (2) plates per upper a-arm only, ¼” strap by 3” wide by 6” long, welded straight down to spring bucket area only. If you do not want to weld you may use 1 3/8” bolt per side in center of a-arm straight down to factory flap on Fords. ** Tie rods must be factory in factory position,
**Sway bar must be make for make in the factory position. Cannot be used to reinforce car, or come in contact with any pulley protector at any time. Bushings can be removed at lower a-arm and bolted with 3/8” bolt maximum.


Frames can be shortened to front of core support, Do not move core support or alter/move core support mount. No forming of frame. You may notch the frame in rear, or heat and dimple but do not weld anything


You may have 2 additional points to hold down hood. ¾” threaded rod, chain, or wire may be used. Sheet metal to hood only. Another choice would be to use 2 spots per side of 4” angle iron. May be welded to hood and trunk. 1 3/8” bolt to secure angle together. You may use a combination of choices as long as you are at 6 spots per hood maximum. Hood webbing may be bolted around cut offs with a maximum 12 bolts per hood. Hood hold downs may be factory jack stand bases, or a max 6x6 by 3/8” plate steel. Minimum 12” hole must be for fires if running inner wheel wells.


Engine Swaps are legal. Engine may use any protector that doesn’t reinforce the car, such as lower cradle, pulley (Cannot touch sway bar) , front plate, ( no wider than engine,) tubes around air cleaner, header, (must cut hood back 4” from protector.) Header to header, (just above air cleaner). Factory frame mounts may be swapped for aftermarket, but must be bushing style not solid mounts. Not oversized. Maximum ½” motor mount bolt. No additional mounting points if using aftermarket cradle. You may use 2 chains to hold factory mounts, 1 per side, to spring bucket area only if not using lower cradle. (No distributor protectors) .**Transmissions must use factory cases, No transmission protectors, No mid-plates, unless over the counter style strictly to change bolt pattern. May use any bell housing, but if tight in tunnel you must put 3- 3” relief cuts in the tunnel. No forming tunnel sheet metal. **Crossmembers must be factory or 2” square tubing by 3/8” maximum diameter (Cannot reinforce in any way). Bolted or welded to frame. You may use a 6” piece of angle per side to mount crossmember, cannot be within 6” of crush box, or s curve on GM’s. Aftermarket setups must be free floating on crossmember. You may weld 2 pieces of angle on crossmember to keep trans from going side to side, as long as it doesn’t prevent from sliding back.


4 point cage. Material not to exceed 6” diameter tubing or pipe. Dash bar mounted above steering column, at least 8” above tunnel, (If running shifter bar off dash bar, must be 6” above tunnel) Door bars cannot go further forward than dash bar, or back more than 12” of front seat. May have 2 4” max width down bars off door bars to sheet metal of floor, May weld chain off 1 down bar to frame. This down bar must be within 16” of center post of car. Rear seat bar must be mounted within 6” of center of seat, Rear seat bar may be contoured to accommodate taller/bigger drivers for addition space. **Roll loop/Halo bar, must come off rear seat bar. Roll loop to go straight up to roof. 2 3/8” bolts and 3” pieces of angle to bolt roll loop to roof for added roof support. No welding ** Gas tank protector, Mounted off rear seat bar,, No more than 30” wide, 18” tall. 6” Min. off floor, In station wagons 1” off rear end hump., any gussets off rear seat bar must not reinforce rear doors, Protector can be mounted tight to sheet metal. No altering sheet metal, or roof sheet metal. ** Front window bars. Firewall to roof vertically. 2 Max- flat/square material 3” max width. 1 horizontal bar may be used to connect to 2 vertical bars.


1 or 2 batteries of choice- 1 larger style (semi) style is acceptable. Battery mounted to cage or front floor in a battery box. Wood or steel box no larger than 4” in diameter than the battery. Do not reinforce floor with battery box. ** No factory gas tanks. 10 Gal max size tank. Steel tanks only. Tanks with fittings only. Fuel line approved for that use only. Any rubber lines going through sheet metal must be encased in larger hose of some type of protection. Tanks mounted off rear seat bar. Bolted or minimum of 2 ratchet straps to mount. See tank protector rule. Pump Gas only, no alcohol of equivalent. Gas pedal of choice, engine mounted or cable, No excessively large pedal setups to reinforce floors and car. Shifters must be mounted to keep drivers safe. Cutting out firewall for distributor clearance is OK No cutting out tunnels completely. Just to unsafe to run. Air or water type transmission cooler are legal but must have approved lines.


(1/2” Max diameter body bolt)
Body mounts may be replaced, No adding mounts over factory. ½” maximum factory body bolt. Cannot extend through bottom of frame, The body mount can go through sheet metal with 4” maximum washer and nut. You may replace spacers with steel mounts or remove completely. Cannot weld spacers to frame or body.


May be welded or chained/wired. Maximum 3 spots per seam. 6” long, 3” wide by ¼” if welding doors with added material. Drivers door is unlimited for welding or chaining. You may duct tape posts with a maximum of 8’ of surface. If coming from a show that allows more you must trim to fit within the rules


(14-16” wheels only)
Minimum 14” wheels, maximum 16” wheels allowed. Wheels may have full or 7” centers to change patterns. No homemade wheels, must start as factory. Bead protectors and lug nut protectors are ok. 23” minimum 30” maximum sized tires. Any ply. Doubled tires are ok.


Any OEM automotive rear end. Hybrid rear ends using factory components are legal. Rear ends may be braced as long as it doesn’t reinforce car in any way. No aftermarket oversized rear end designs will be allowed. Trailing arms must remain stock. May be lengthened or shortened, with 1” overlap, but must start as factory and retain factory bushings. You may use 2 chains to assist in holding in rear end. 3/8” Chains around humps and around rear end may not exceed 36” long with no more than 2 bolts per chain. Do not weld chains to anything, . Leaf springs must be automotive. 9 max per side, factory type stagger. 6 clamps per side, factory or 3” wide using up 7/16” bolts. No leaf conversions. Watts conversions are legal if using ¼” style components, on cars that are not 4 link.


(4 Spots MAX)
4 spots Maximum. Trunk lid may be tucked up to 50% but must stay on hinges or removed. 2 spots maximum to frame using ¾” threaded rod. May be welded to side of frame vertically between body mounts or go through body mount hole, Or 4 spots 6x3x3/8” material to weld down lid, Or 2 of each. Chain and wire is also acceptable ways to secure trunk lid. Trunk lids cannot be dished over 8”, do not create a wedge with your trunk. Cut an 12x12” inspection hole in lid for inspection. Hold down plates can be jack stand bases or 6x6x 3/8” flat plates to hold down lid for threaded rods. Mopars (6 spots) may use 2 3” x 5” x1/4” plates per seam in addition to threaded rods. Tailgates can use up to 4 plates 6 x3 x ¼” plus 2 chains around bumper. ( 6 Spots max)


(15” Minimum Height bottom of bumper or frame
Any automotive factory bumper may be used on rear of vehicles. Can be reinforced but cannot increase the dimensions of the bumper. Aftermarket steel tubes 3” x 6” 3/8” maximum with no added points may be used. Factory bumper brackets welded up to 8” forward of rear body mount. Bumpers may be tipped up to a 45 degree angle. Bumper shocks may go into rear frame on Fords up to 8” if not using bumper brackets. May use 2 chains from bumper to tail light area to assist bumper from falling off.


(4 5x5 x ¼” plates max)( PAINTED ORANGE)
On pre run cars with frame damage. You may repair area by using a 5x5x1/4” fix it plate. Plate may be contoured of bent around frame but used on the frame only, not body. Plates must have a 1” gap between them including weld if used next to each other. Rust repair is legal to fix rusted floors, roofs, frames etc. On tin repair take a pic of spot prior, cut out rust, replace with exact thickness tin with maximum ½” overlap. Frame repair, same take a pic of area, use exact same thickness steel, must be butt welded or ¼” overlap at most. This is strictly enforced. NO HUMP PLATES, UNLESS USING FIX IT PLATES ON USED CARS
**any driveshaft including sliding shafts are legal. No bent shafts will run.
**body shaping is legal. No creating a wedge affect, or narrowing of car. No doubling over of tin.
**Speaker decks must remain in stock position but can follow trunk dish rule.
**Roof signs must not reinforce cars. Cannot attach to rear window bar.
Lower cradle must attach to the factory crossmember towers and holes. You may use JFC lower engine cradle or equivalent type. Other ways to mount 6x6x1/4” plate to attach a legal style rubber engine mount for this class. *No part of engine cradle or engine mounts may attach, touch, or wrap any part of aluminum crossmember, or frame rails other than the crossmember towers. *There should be nothing between the frame rails and aluminum towers, this includes lower cradle.


(s10s, mini vans, small SUV’S etc) No 04 and newer Durangos


MANTITORY FULL FACE HELMETS WITH CHIN GUARD NO CHRYSLER V BUMPERS NO V8”S, unless factory, Remove all glass, chrome, plastic, moldings, headliner, flammable material, A/C coolant, antifreeze, trailer hitches and interior decorating Stock gas tank must be removed. A small metal tank must be mounted in the rear Seat area. The tank must be very secure and covered. Use proper rated fuel lines, Plastic tanks must be in a metal box. NO EXCEPTIONS Electric fuel pump allowed but switch must be clearly marked on/off. No more than
(2) batteries allowed which must be relocated to front passenger Floor, secured and covered. Floor shifter allowed. Ignition and wiring modifications (hotwire) allowed.
Hood must have 12” x 12” minimum hole to easily extinguish fires. Extra hole(s) in hood not required if header holes are least 12” x 12”.
Car and driver qualify as a team for the feature.
4 wheel and 2-wheel trucks and suv allowed. 4-wheel drive vehicles must remove one drive shaft.


1. You may change front & back bumper to 80 and newer, tube or pipe may be used. 3 x 4 max must be straight and hollow 3/8 max no creative bumpers allowed. May be bolted or welded on to frame. Nothing welded past 4 inches from the front of the frame. NO EXCEPTIONS


1. Six bolts or six chains or six wires will be allowed. Two may go to frame, the other four may be sheet metal to sheet metal. If you choose to use threaded rod it must be welded vertically, one-inch max. Must be within 3 inches of stock location. Only one of these three may be used.




1. Must be in stock location. No homemade radiators. No Radiator protectors allowed. No radi barrels


1. One bar in the dash is allowed. One bar behind the seat is allowed. If you choose you may connect these along the inside of door. Strongly recommended, only two down bars off back seat bar to the frame or body, vertical only. You may weld box to cab outside only two 8-inch straps per side. Minnie vans please weld your large doors if able. Dash bar must be 6 inches from trans hump. No cage material larger then 4x4 tube or pipe. DOORS 1. Doors may be chained, wired 2 spots per seam, or welded 5 on 5 off max ¼”x3” inch wide Strap. Nothing welded to frame. . MinI vans please weld your large doors if able.


3 3/8 bolts per fender only


1. Fuel cell is highly recommended in a steel box. This is to be located in the most Forward center of box or inside of cab. Gas line to be run in a Protective conduit.


1. No ply restriction. Nothing higher than 30 inches tall.


1. You may clamp springs, 4 per side. Clamp size, 7/16 bolts, 5 inch Length material 3 wide ¼ thick material. Max height 20 inches. Minimum frame height is 16 inches. No Homemade springs stock amount of factory springs for that vehicle. You may lightly weld front suspension down to get more height no larger than 1 inch material ¼ [no rod] thick vertical only Spring spacers allowed. Front upper and lower A arms must be stock like factory.


1. Two max, must be covered or in a box. All battery boxes and fuel cells must be securely Mounted.


1. Body bolts leave them alone rusted or broken ones can be replaced. Box must remain upright in stock location, no tucking. No extra body bolts allowed.


Must be stock steering. No modified tie rods. Aftermarket column allowed.


1. Tailgate must remain upright in stock location. You have three ways of fastening your tailgate. You may wire or chain or weld a 3-inch-wide strap per seam. Outside only.


• Stock type rear-ends for that size and type of vehicles. Swapping rear ends is ok as long as it’s a small truck or SUV type. (No full-size truck rear ends) You may chain your rear to frame one 3/8 chain per side.


* Repairs only allowed on a kinked area {not stressed} 4 inches by 3 inches by ¼ total per frame rail when its gone to bad. WELDING Nothing may be welded unless stated in the rules. This is your warning! Otherwise Prepare to stay on your trailer small repairs must BE OKED AHEAD OF TIME.

2023 Midsize-Street Stock (Gut And go) Class:, Compacts, and Fullsize Trucks

If it cannot be built in a couple days your over building!
If it isn’t in the rules you cannot do it!


Must wear long pants, shirt and shoes
Must wear approved helmet and eye protection during competition.

Car Preparation:

**Must completely remove all air bags including charges by unbolting complete airbag.
Must have working seat belt for driver.
Must strip all lights, glass, plastic trim, bumper covers and anything else that can fall off during competition. Interior: must remove carpeting, head liner, rear seat, and any loose debris inside car. Trailer hitches must be removed.

Car Building:

Up to 4 chains, cable, or wire may be used to secure hood, trunk, and doors. 3/8” max chain size. Hoods can be moved forward but must stay on at least 2 hinges, or if you don’t run hinges 10” max forward. Trunk lids must remain on hinges, you may tuck 50% of lid in trunk, you may also completely remove. You may V trunk and speaker deck up to 8” down from factory position to increase vision. Factory hinges do not count towards 4 spots.
Must have 12”x12” hole cut in hood in case of fire. Headers are ok
Recommended relocate battery to front floor of vehicle, secured in a wood or angle iron steel enclosure. Enclosure bolted or chains to passenger front floor. Battery must be covered by floor mat.
We recommend relocating a steel (only) boat style gas tank or aftermarket, built tank with fittings up to 10 gallons off recommended rear seat bar, or on the floor where your feet go on passenger side of vehicle. Chained or bolted to floor. We will allow cars, and vans equipped with factory tank ahead of rear axle with limited rust to leave in stock location.
We recommend a rear seat bar. Mounted midway up rear seat horizontally from pillar-door to pillar- door. May be welded or bolted in but must pass safety.
Stock DOT, street tire and rims only. No tractor lug, nothing heavier than 6 ply. May be doubled and tubed or use flaps on outside only.


If you have a plastic front bumper you may swap with a bumper off a midsize, only, front wheel drive 80s and newer car. Do not shorten or modify any more than necessary to get bumper to bolt to car. Both bumpers may have 2 chains from bumper to core support, in front or to tail light area in rear. 3/8” max chain. 24” long max. 1 link bolted or welded for each spot. No height above 20” stock suspension parts. If pre bending rear bumper must remain under 20” high.

All cars must be safe at all times to run. Do not alter suspension, or engine mounts etc. This is a strict off the street class. No excessively rusty cars will be permitted to run!
You may run safety bars as in semi stock class. No Rear window bar.
Trucks-3/4 ton are OK, No Super Duties or HDs, No Lift Kits, Factory front bumpers, may drop tailgate to work as rear bumper if stock isnt available. May chain box 1 pass in 4 spots to hold box onto frame. No pre-bending. Bumper height 24 max height, 18 Min. Shaft removed from front if 4 wheel drive. Tank Must be moved to box in regular cab, behind seat in extended or crew cab.
Power Wheels:


1. This is supposed to be FUN for the kids! Parents PLEASE don’t ruin it for them!1
2. Power Wheels Derby is for kids 3-8 years old. All kids MUST be accompanied by an adult and have a Minor Release form on file.
3. Derby is limited to 12-volt Power Wheels only! All power wheels must remain as they came from the store. Nothing may be added or reinforced for strength. Paint them up and let the kids have a blast!
4. Stock tires only.
5. All power wheels must set like the store bought ones no raising or lowering the front or rear of the power wheels.
6. Stock battery can be replaced with a 12-volt mower battery only. It can be positioned anywhere inside the car and covered, not in the passenger seat.
7. Rollover bars will be allowed as long as we feel they are safe and don't reinforce the cars…so bring your saws.
8. Helmets are mandatory.
9. Seatbelts are recommended.
10. Doors and hoods must be secured with a bungee cord, rope, or similar