UMP MINI STOCK RULES | cedarridgespeedway

2024 Mini Stock Rules

Car Requirements:

Must be a commercially produced 4-cylinder vehicle from a known auto manufacturer.
No turbo charged, super charged or rotary engines allowed.
No all-wheel drive cars or all wheel steer cars.
Engine must be outwardly stock appearing. There is no engine teardown in any way. - Engine must match brand of car (ex. Honda must have Honda engine). Engine swaps are allowed.
Mirrors are allowed.
Race receiver / RE Switch or a like device is always mandatory on track.
No two-way radios of any kind allowed.

Weight:

All cars must weigh a minimum of 2,200 pounds with car and driver after the race.

Exceptions: 50 lb. weight break for HANS or like device

50 lb. weight break for full containment seat

Suspension:

Must have stock rear and front suspensions as from factory. Any transplanted OEM suspension or steering parts must be brand for brand and must bolt into factory mounting holes without alteration to operate. Slotting of factory mounting holes allowed. No adjustable aftermarket suspension components. Any adjustable OEM components must be welded to render them non-adjustable Plating and structuring for durability and safety is allowed.
No racing shocks/struts allowed. Springs may be heated, clamped or use spring rubbers. Springs may be swapped from other models but within 2” of factory installed height.
There will be a strut assembly (to include spring and bumps or devices) claim of $200 each.
Rear control arms should be stock but may be braced / strengthened / repaired. No adjustable control arms.
Stock type aftermarket suspension bushings are allowed.
Stock type STANDARD, non-adjustable, non-rebuildable shocks / struts required.
No weight jacks / cups of any kind.
Suspension limiter chain or tether is allowed as a solid piece. No aftermarket limiters.
Bump stops are allowed on struts.

Body / Roll Cage:

Must have a fully welded, quality built MINIMUM 6-point roll cage inside the car with minimum of 0.95" thick tubing.
Minimum 3 driver door bars / 2 side door bars.
Minimum of 3 vertical windshield or “trash” bars in front of driver.
No part of the driver’s helmet may extend above the lower level of the roll cage halo.
Roll cage may extend forward behind bumpers. Bumpers must be covered in some way with no exposed sharp corners. Coverage is at the officials’ discretion.
Frame-like tubing only allowed for REPAIRS in front of front strut towers and behind rear strut towers. No other frame-like tubing may be added to chassis.
Aftermarket asphalt style nose pieces allowed. Any nose piece used must be conformed to fit at reasonable and near-factory dimensions.
Sunroofs must be closed / covered with sheet metal.
No holes are allowed in the hood or front fenders and the hood should cover the entire engine compartment.
Holes in the firewall and floor should be covered in order to seal off driver from hot fluids or parts. - Floor pans and/or firewalls should remain intact between the front strut towers and rear strut towers. Firewalls and floor pans may be patched with STEEL for REPAIRS only.
Gutting of body is allowed however car should maintain reasonable appearance of stock car. - Driver and front passenger door window openings along with rear and front window openings must remain open and uncovered. Front windshield visors no more than 12” are allowed. Rear door and/or small rear side windows can be closed or covered.
Sheet metal decking should remain flush with doors and stock body lines and should not create any lips or airfoils. There must be 2 inspection doors on the decking. 1 at front and 1 at the back.
Sheet metal roofs CANNOT be flat and should be made to closely resemble the factory roof lines. Roof pillars must also closely resemble the factory shape and lines.
Some sheet metal will be allowed. The spirit of this rule is to keep cars remaining as close to stock appearing as possible. The Whole car cannot be sheet metal.

Tires / Wheels / Brakes:

Aftermarket racing wheels allowed – 8 inch maximum. Bead locks allowed on right side only.
Street legal DOT tires required. No competition tires, drag radials, mud grip lug tires, racing tires or racing recapped tires allowed. Directional tires are allowed.
Tire inner tubes are allowed.
Tires can be mixed and matched for stagger on all 4 corners.
Stock-type master cylinders required. No bias adjusters or shut-off valves.
Brakes must remain stock-type and operational 4-wheel brakes. Aftermarket pads and rotors are allowed.

Ignition / Fuel / Exhaust:

Any air or oil filters (K&N, etc.).
Intake must be a stock intake. Porting and polishing are allowed. No Skunk 2, etc.
Any racing fuel or pump gas allowed.
No Nitrous oxide or nitro methane allowed.
Stock-type fuel injection or stock manufactured carburetor only (Motorcraft, etc...). ONE 0.800" maximum throttle body spacer may be used. Stock-type aftermarket and OEM throttle bodies are allowed. No Holley, Weber or other racing carburetors allowed. Carbureted cars must be stock for engine.
Aftermarket radiators allowed – can be braced for support.
Aftermarket headers are allowed.
Computer may be chipped and/or tuned. A standalone ECU and aftermarket harness are allowed. Ignition coils must remain OEM however the coil-on-plug kits are allowed.
Racing fuel cells are highly recommended. An approved racing fuel cell must be commercially produced with a plastic or rubber bladder as well as an outer metal enclosure. Cell should be mounted properly as per manufacturers recommendations, and it should have a rollover valve or ball.
The fuel rail may be aftermarket in the interest of safety. No exotic or high-capacity fuel rails. A fuel pressure regulator and/or gauge are allowed.
Exhaust which runs through the cockpit should be fully shielded from driver with metal.
Exhaust pipes must not extend out of any body surface more than 1” and pipe must be blunt and free of sharp edges.

Cedar Ridge Speedway Morgantown, Ky

Cedar Ridge Speedway
Morgantown, Ky