Columbia River Slot Car Racers Rules

General Rules:

Bodies: All cars must be “color” painted (clear coat only is not acceptable), Include a painted/detailed vacuum formed/resin cast driver to scale, Interior cockpit tray that completely conceals the whole chassis, Numbers ½” tall located in three places, and must begin a race fully Intact/Complete, with no missing parts.

Unless otherwise specified for a specific class, bodies Must have both Stock front & rear windows installed.

Bodies may Not be stretched, have any material removed or be modified to fit a chassis, unless otherwise specified within the Body Modifications/Required section of a class.

*Note: Lane stickers to be put on windshield or at close proximity to, so Corner Marshall can see it.

Chassis: All brass chassis are Required to have beveled pan edges to protect the track surface from any damage. The chassis must Not be visible, or protrude past the body perimeter when viewed from above, or through the Drivers Compartment. Guide flags must Not extend past beyond the foremost part of any body when viewed from above.

Gears: Spur and Crown gears will have no less than (.040”) ground clearance. This rule is written to preserve and protect the track surface, as these gears can cause severe damage.

Motors: Group “Open” Only Super 16D Setups are allowed. Note: This motor group “allows” the use of both Chinese & American made Armatures. American made armatures “must” retain their original identification label. No outlaw arms of any kind are allowed. Blueprinting, Ball bearings/Bushings (both ends of motor) Armature and magnet replacement are allowed. Shunted brushes, Cobalt/Neo Magnets, Magnet Shimming, Rewinding/Dewinding of armatures are Not allowed.

Motors: Group “Standard” Super 16D motors (i.e. Super 16D Parma #502). ProSlot 2001, 2003, 2101. Note: This motor group “requires” the use of Chinese made Armatures only) Motor brushes/springs may be adjusted/replaced as needed. Armatures may be shimmed/coms trued. Shunted brushes/magnet shimming/Ball Bearings are Not allowed.

Motors: Group Hawk 7/FK (unserviceable motors) may be allowed in specific classes.

Tires: No Tire will be less than ¾” (.750”) in Diameter, excluding the 4.0 Flexi Class, or otherwise specified elsewhere.

Adding traction compound to your tires (ie gluing) is not allowed. Cleaning tires with solvents & softeners Are allowed however, they must be Completely Dry before placing the car on the track.

All four tires Must touch/roll on the track surface, and are Required to have Black sidewalls

Unless otherwise specified for a specific class, when viewed from above, all four tires must Not extend beyond the widest part of the wheel opening, when the chassis is at the center of lateral movement.

Front tires must Not be partially hidden by the front or rear of the stock/modified wheel well opening,

(this does Not include the “top” of the wheel well opening).

Track/Venue

Track gluing/preparation will only be performed by the track owner, unless otherwise requested.

Columbia River Slot Car Racers: Rules

GT Prototype

Date Last Modified: 6/25/2025

(To be used in conjunction with the General Rules)

Scale: 1/24, 1/25

Years: Any

Body Group: GT-1, Group C, Any Closed Coupe Prototype / any year (No open cockpits)

Body Height, Minimum: Must remain unaltered (Kit Stock)

Body Modifications/Required: Wheel wells May be trimmed for tire clearance. Body posts that are used to attach the body to the kit chassis May be removed.

Interior/Required: See General Rules.

Chassis: Scholer, 2Naste, Sloting Plus SP800001, Scaleauto SC-8001C or SC-8002C. 3/32”, 1/8” Axles allowed.

Chassis Modifications/Required: “Stock Kit included” Axle Housing brackets front & rear are Required. Side Pans May be bolted to the “Rattle” plate. “L” rails May be soldered to the side pans for body mounting. A custom/scratch built front pan May be added. The “Rattle” Plate May be strengthened with piano wire & JB Weld. A hole directly under the motor “on the chassis pan” May be cut for cooling. Holes May be reamed out to allow installation of American bushings & bolts/screws. Bushings May be glued/soldered in place. Wheel base May be extended with a Custom/Scratch built system. Axle bushings & Bearings may be used in the front & rear.

Configuration (Motor): Angle winder. sidewinder

Axles: 3/32”, 1/8” Axles are allowed.

Bushings/Bearings: Axle Ball Bearings, Oilite Bushings Are allowed both front & rear.

Gears: 48, 64 Pitch. Note: Gears must have a minimum of (.040”) ground clearance, See General Rules.

Ground Clearance, Minimum: Front (.055”) Rear (.055”)

Motors: “Standard” (See General Rules).

Tire/Dimension: Minimum tire diameter Front 13/16, (.8125”). Any tire / including “O” ring. Front tires may be coated for hardness. Minimum tire diameter Rear (.900”)

Tire/Wheel Maximum Track Width: Front / Rear: 3.25” Tire not to stick out of body more than .0625”

NASCAR (Late Model)

Date Last Modified: 6/25/25

(To be used in conjunction with the General Rules)

Scale: 1/24, 1/25

Year: 1980 to present.

Body Group: Replica of an American made NASCAR Sedan Note: ASA cars are Not Eligible.

Body Height, Minimum: 1/24 scale 1-17/20 (1.850”) Measured from the bottom of the chassis to (1/2”) behind the windshield. (Air dams excluded). 1/25 scale: Excluded from this rule, however, must remain at the (Factory Kit) height.

Body Modifications/Required: Bodies May be trimmed to remove part of the front spoiler and side air dams (to the stock valence height for proper track clearance).

Interior/Required: See General Rules.

Chassis: Bolt Together (i.e. 2NASTE).

Chassis Modifications/Required: Open.

Configuration (Motor): Angle winder, Sidewinder

Axles: 3/32”, 1/8”, Wire

Bushings/Bearings: Ball Bearings, Oilite Bushings Are allowed in both Front & Rear.

Gears: 48, 64 Pitch. Note: Gears must have a minimum of (.040”) ground clearance, See General Rules.

Ground Clearance, Minimum: Front (.055”) Rear (.055”)

Motors: “Standard”/ “Open”, (See General rules).

Tire/Dimension: No less than ¾” (.750) Must still meet the minimum (.055”) Ground Clearance.

Tire/Wheel Maximum Track Width: Width Will be determined by the selected body used.

Note: 1/25 cars rear tires are allowed to stick out past the outer edge of the wheel well a maximum of 3/32” (.09375) to allow .800 rear tires to be used. Fronts must remain within the wheel well outer edge. (See General Rules).

Trans Am

Date Last Modified: 6/6/24

(To be used in conjunction with the General Rules)

Scale: 1/24, 1/25

Years: 1965 to present.

Body Group: Only Cars raced and powered by V8 engines in the Trans Am Series (Convertibles are Not allowed).

Body Height, Minimum: Must remain unaltered (Kit Stock)

Body Modifications/Required: Wheel wells May be trimmed for tire clearance. Body posts that are used to attach the body to the kit chassis May be removed. Rear spoilers May be added with a maximum height of ¼” (.250”). Fender flares May be added to meet the maximum track width.

Interior/Required: See General Rules.

Chassis: Scholer, 2Naste, Sloting Plus SP800001, Scaleauto SC-8001C or SC-8002C. 3/32”, 1/8” Axles allowed.

Chassis Modifications/Required: “Stock Kit included” Axle Housing brackets front & rear are Required. Side Pans May be bolted to the “Rattle” plate. “L” rails May be soldered to the side pans for body mounting. A custom/scratch built front pan May be added. The “Rattle” Plate May be strengthened with piano wire & JB Weld. A hole directly under the motor “on the chassis pan” May be cut for cooling. Holes May be reamed out to allow installation of American bushings & bolts/screws. Bushings May be glued/soldered in place. Wheel base May be extended with a Custom/Scratch built system. Axle bushings & Bearings may be used in the front & rear.

Configuration (Motor): Angle winder.

Axles: 3/32”, 1/8” Axles are allowed.

Bushings/Bearings: Axle Ball Bearings, Oilite Bushings Are allowed both front & rear.

Gears: 48, 64 Pitch. Note: Gears must have a minimum of (.040”) ground clearance, See General Rules.

Ground Clearance, Minimum: Front (.055”) Rear (.055”)

Motors: “Standard” (See General Rules).

Tire/Dimension: Minimum tire diameter Front 15/16” (.9375”). Minimum tire width Front (.400”). Front tires may be coated for hardness. Minimum tire diameter Rear (.900”)

Tire/Wheel Maximum Track Width: Front (3.150”) With the addition of fender flares Only) Rear (3.250”) With the addition of fender flares Only). If fender flares are “Not” used, the body width, both front & rear will determine the maximum track width, See General Rules.

RTR Classes

Flexi 4.0”

Date Last Modified: 6/6/24

(To be used in conjunction with the General Rules)

Scale: 1/24

Years: Open

Body Group: Eligible Bodies include the LMP, GT1 & GTS, Group C. Note: JK-RTR (Race Ready) Bodies/Chassis are also eligible, and are available for purchase from PASER.

Body Height, Minimum: N/A

Body Modifications/Required: Painted style themes. The body Must cover the rear tires however, the tires May protrude from the body side, a maximum of (.020”.) Body Must completely cover the Guide Flag/Chassis, when viewed from top/front. Front wheel wells need Not be cut open/radiused to conceal the front wheels. Rear wheel well openings Must be cut open to reveal Both the Wheel & Tire. All clear windows Must remain intact.

Interior/Required: See General Rules.

Chassis: Any 4.0” wheel based Stamped Steel chassis. Chassis must Not exceed a 4.0” wheel base

Chassis Modifications/Required: Chassis must Not exceed a 4.0” wheel base. Chassis May be modified to accommodate a 1/8” Front axle. Chassis frame May be weighted, reinforced, bent, Motor Plate slotted. Lead Wire restraints, Pin Tubes to attach body (no longer than (1.25”) May be soldered to the chassis. Note: No other cutting Grinding, Modifications or Weighted Guide Flags, are allowed.

Configuration (Motor): “Standard” See General Rules.

Axles: Front 1/16” Rear 3/32”, 1/8” allowed.

Bushings/Bearings: Oilite Bushings Only. Note: May be glued/soldered in place.

Gears: 48,64 Pitch. Note: Gears must have a minimum of (.040”) ground clearance, See General Rules.

Ground Clearance, Minimum: Front (.047”) Rear (.055”).

Motors: “Standard” Including Hawk 7/FK (See General Rules). Note: Motor May be soldered, glued, silicone in place.

Tire/Dimension: Front 1/16” axles (O-Rings mounted on wheels) Note: Replacement oversized O-Rings May be Required to prevent a chassis (RTR included) from making contact with the track surface. Oversized O-Rings are made available from the parts department. Rear: Any tire combination May be used. Appropriate spacers may be used to achieve proper track.

Tire/Wheel Maximum Track Width: Front (3.25”) Rear (3.25”)

Flexi 4.5” NASCAR/Truck

Date Last Modified: 6/6/24

(To be used in conjunction with the General Rules)

Scale: 1/24

Years: Open

Body Group: Only Replicas of an American made NASCAR Sedan/Truck (No ASA cars).

Body Height, Minimum: (1.750”) Measured from the bottom of the chassis to the center of the roof line. Trucks (1.850”) Measured same as cars. All other body rules remain the same as cars.

Body Modifications/Required: Painted NASCAR style themes. Body Must completely cover the Guide Flag/Chassis, when viewed from top/front. Front wheel well openings Must be cut open/Radiused to reveal the Wheel Only as to allow for added body rigidity. Rear wheel well openings Must be cut open to reveal Both the Wheel & Tire. All clear windows must remain intact.

Interior/Required: See General Rules.

Chassis: Any 4.5” Wheel Based Stamped Steel Chassis.

Chassis Modifications/Required: Chassis must Not exceed a 4.5” wheelbase. Chassis May be modified to accommodate a 1/8” Front axle. Chassis frame May be weighted, reinforced, bent, Motor Plate slotted. Lead Wire restraints, Pin Tubes to attach body (no longer than (1.25”) May be soldered to the chassis. Note: No other cutting Grinding, Modifications or Weighted Guide Flags, are allowed.

Configuration (Motor): Angle winder.

Axles: Front (1/8” or 3/32”). Rear (1/8”) Only.

Bushings/Bearings: Oilites Only. May be Glued/Soldered in place

Gears: 48 Pitch Only. Note: Gears must have a minimum of (.040”) ground clearance, See General Rules.

Ground Clearance, Minimum: Front (.055) Rear (.055”) Note: Without the Guide Flag supporting the car.

Motors: “Standard” (See General Rules). Note: Motor May be soldered, glued, siliconed in place.

Tire/Dimension: Minimum Diameter Front (13/16” .8125”). Minimum width. (.375”). Minimum Diameter Rear (.750”). Note: Pro Track Daytona tires are the Required spec rear tire to be used in this class. CRSCR stocks & maintains an inventory of these required tires & sells them to racers at a discounted price.

Tire/Wheel Maximum Track Width: (3.25”). Appropriate spacers May be used to achieve proper track.

Womp (Stock)

Date Last Modified: 6/6/24

(To be used in conjunction with the General Rules)

Scale: 1/32”

Years: Open

Body Group: Eligible Bodies include: Group C, GTP, LMP, Sports Car, Can Am. Note: Clear Lexan Bodies Must be used. Note: Open Wheel F1, or sedan type bodies are not allowed.

Body Height, Minimum: N/A

Body Modifications/Required: N/A

Interior: See General Rules.

Chassis: Steel Womp Chassis Only.

Chassis Modifications/Required: Motor mount angle May be bent to improve the Pinion/Crown gear alignment. Motor Mount May be Ground/Modified to facilitate Motor Mount Screws orientation. Pin Tubes for Body mounting May be added/Soldered/Glued to the Chassis. Body Must mount solidly to the Chassis. Additional weight may Not be added to the Chassis in the way of Ballast, to improve the handling.

Configuration (Motor): Inline Only.

Axles: Front (1/8”) Rear (1/8”) (3/32”).

Bushings/Bearings: Oilite Bushings Only. Note: Oilite Bushings May be Glued/ Soldered in place.

Gears: 48 Pitch Only. Note: Gears must have a minimum of (.040”) ground clearance, See General Rules.

Ground Clearance, Minimum: Front (.047”) Rear (.047”) Note: The Crown Gear is included in the measurement.

Motors: Professor Motor PMTR1032 (Spec Motor) Only. Note: The PMTR1032 is a sealed/Not Serviceable end Bell Motor that replaces the Fox 10 Mabuchi FK Motor, and Must be used. PASER will stock and maintain an inventory of these motors for purchase. These legal motors Will carry the PASER identification mark. If you purchase a motor from another source, you Must have it inspected/approved & identified/marked as legal. It is suggested that you purchase your motor from PASER, to eliminate any confusion.

Tire/Dimension: (Front) Stock Parma O-Ring, or equivalent Must be used, and mounted on the original stock wheels. Note: Front wheels May roll independently of each other. (Rear) Any Rear tire May be used, as long as a minimum Ground Clearence of (.047”) is maintained.

Tire/Wheel Maximum Track Width: Front (2.50”) Rear (2.50”)

Production Open Class

This is an Open Class for production type 1/32 cars.

Must use chassis and injection molded bodies available from retail manufacturers. Scratchbuilt chassis, brass or plastic, are NOT allowed.

Potential car brands include Revoslot, NSR, Thunderslot, Slot.it, etc. The original chassis must be used.

Chassis must use the original injection molded plastic body it was original fit with. Must retain the original complete interior.

Motor is open. (Rob's Redline Raceway is a FAST track! Higher RPM motors than those supplied in the production cars may be suitable i.e 30K +?).