Downriver Speedway
Racing Rules
Basic Track Rules
ALL cars will maintain 1/16" min track clearance
ALL cars will maintain a max tread width of 3 1/4"
When viewed from above body should cover chassis, flag and tires except open wheel cars
ALL cars must have front and rear windows except open cockpit cars
ALL cars must have 4 wheels and tires at all times
ALL classes must have full interior in at least 3 colors
Interior must have 3D drivers head, shoulders and hands on a steering wheel
When viewed from above interior must cover chassis, motor, tires and track
Windows must be clear or tinted, no black or painted windows
ALL race cars will have 3 numbers in proper location and at least 1 sponser logo
ALL racing will be done in the spirit of good sportsmanship and fun
2021 Downriver Cup Cars
Based on JK's 4 1/2" Cheetah 21 RTR Stock Car
Tech
NO modifications of any kind
Max width 3 1/ 4
Front and rear axles must be centered under car - no offset
.055" ground clearance at rear up to axle including gear
.032" everywhere else
Min front and rear tire diameter .790"
Motor may be solderd to top of mounting bracket
Axle bushings may be soldered in place
Stick on lead weight may be added
1/4" min front and rear bumpers
Max rear spoiler height 1 3/4"
Front wheel openings must be cut open
Body must be painted with clear windows
Must have full 3d interior card in 3 colors
Must have 3 numbers in proper location and at least 1 sponsor logo
Standard Parts List
Complete Car - Any jk O10B seris Hawk 7 car
Rolling Chassis - jk O10W
Chassis - jk C60
Flag - jk U3
Flag Spacer - jk U17
Flag Shim - Any
Flag Nut - jk U5
Wire Clip - jk U15
Lead Wire - Any
Braid - Any
Front Axle - jk A3
Rear Axle - jk A1
Axle Bushings - jk U22
Front Wheel - jk T105F
Rear Tire - jk T7S3N
Spur Gear - jk G638
Pinion Gear - jk P610
Motor - jk M7
Motor Screw Self Tap - jk M53
Motor Screw Threaded - jk M55
Body - See Optional Parts
Body Clip - jk U44
Optional Parts List
Flag - jk U4
Brass Flag Nut - jk U7
Pro Flag Nut - jk L31, L45 or U61
Pro Flag Nut Tool - jk L30
.790" Independent Front Wheel Kit - jk T100F
.812" Independent Front Wheel Kit - jk T106F
Front Wheel Retainer - jk U20
Rear Wheel - Any jk .790" or .820" Diameter
Motor - jk M7BB Ball Bearing
Body - jk B125B, B126B, B127B, B128B, B129B, B130B, B131B
Floating Body Mount Kit - jk U63
NASCAR Points Series
A new points race for Cup Cars will begin 5/14/21 and continue thru November
The new schedule includes every race on
the NASCAR schedule +
including the Chase for the Cup
Points will be awarded similar to NASCAR Rules
2021 Cup Car Champion receives a
New 4 1/2" Cheetah 21 Race Car along with becoming this years Downriver Cup Champion
JK Sportsman
JK Cheetah C21 four inch chassis only
No reinforcing or modifying of chassis
Any JK .010 Body
Body MUST be cut on cut line
No cutting open rear of body above cut line
JK Hawk M7 or M7BB Motor Only
Motor must be screwed into stock location
Any JK Guide Flag
Any JK Braid
Any JK rear tire min diameter .765"
Any JK o-ring front
JK 64 pitch 10/36 gears or
JK 48 pitch 8/29 gears only
JK Non adjustable axle bushings only
.062 min. clearance at rear axle including gear
.032 min. clearance everywhere else
Maximum rear spoiler height 1 5/8"
No modifications to anything
Fun and Affordable
Box Stock
Entry Level Racing
JK 4" LMP/GT1
This is a Body Specific Class
Based on the Sportsman Rules Below
Your Choice of 23 LMP/GT1 Bodies
Roadsters
B87B BMW V12 B88B Panoz B89B Lola Judd
B98B Raynard B99B Chrysler B101B MG Lola
B102B Dome B104B Ascari B106B Lister
B107B Porsche B108B Lola B109B Mazda
B110B Audi B151B Cadillac B160B Lola
Coupes
B85B Porsche B86B Audi R8 B100B Bentley
B111B Bentley B113B Mazda Dyson
B114B Lola W/Rib B150B Mercedes CLR
All bodies MUST be cut on cut line
NO cutting open back of body above cut line
You MUST retain a min. 7/8" rear of body
JK INDY / F1
Any JK Cheetah 21 INDY/F1 Chassis
Any JK .010" INDY or F1 Body
JK Hawk M7 or M7BB Motor Only
Any JK Guide Flag
Any JK Braid
JK 64 pitch 10 tooth pinion only
JK 64 pitch 37 tooth spur gear only
JK Axle bushings only
JK INDY/F1 Front Tire only
Any JK Rear Tires min .765"
.050 clearance at rear axle including gear
.032 clearance everywhere else
No modifications to anything
Great Open Wheel
Box Stock Racing
4" NASCAR Trucks
This is a body specific class
Based on our JK Sportsman rules
Your choice of 6 JK NASCAR Truck Bodies
B63B Chevy B64B Chevy
B65B Dodge B66B Dodge
B67B Ford B68B Ford
Body MUST be cut on cut line
No cutting open back of body above cut line
Vintage 24 Hour LeMans Coupes
This is a body specific class
Based on our JK Sportsman rules
Your choice of 6 Vintage GT Coupe Bodies
RFD324C 330P3 Ferarri RFD329C Chaparral 2F
B51B Ford GT B90B FORD Mk IV
B92B Porsche Carrera 6 B95B Lola T70
Body MUST be cut on cut line
No cutting open back of body above cut line
Rear spoiler may be added
Maximum spoiler height 1 5/8"
WOMP WOMP
DOWNRIVER LEGENDS
Any stamped brass or steel Womp chassis
No drilling or grinding of chassis
Reinforcing chassis OK
Motor may be soldered in place
Adjustable axle bushings OK
No ball bearings
Motor: B52 ball bearing 25000 RPM only
Gears: 48 pitch only
Gear Ratio: 9x27 or 10x30 only
Axles: 1/8" or 3/32" front or rear
Front tires: Any o-ring or foam tire
Rear tire: Any meeting min. clearance
Guide Flag: Any meeting min. clearance
Max width: 3 1/4"
Min. clearance: .032" front and rear
Any Womp Legends Body
AWRA WOMP WOMP
Outlaw Legends
Formula 1
Sportsman
For Complete AWRA Rules go to
www.facebook.com/
AWRA Rules for Womp Racing
Hammerheads
This is a NEW Body Specific Class Based on our JK Indy / F1 Rules
Featuring
The NEW Downriver Speedway Exclusive '60s Hammerhead Body
Body fits wide chassis only
Womp Womp
Downriver Outlaws
House Class Based on AWRA Rules for Outlaw Sportsman
Except
Any Womp Womp Body Will Be Allowed