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The rules and/or regulations set forth 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 condition 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 PUBLICATIONS OF OR COMPLIANCE WITH THESE RULES AND OR REGULATIONS. They are intended as a guide for the conduct of the sport and are in no way a guarantee against injury or death to a participant, spectator, or official.

The race director shall be empowered to permit reasonable and appropriate deviation from any of the specifications herein or impose any further restrictions that in his/her opinion do not alter the minimum acceptable requirements. NO EXPRESSED OR IMPLIED WARRANTY OF SAFETY SHALL RESULT FROM SUCH ALTERATION OF SPECIFICATIONS. Any interpretation of the rules is left to the discretion of the officials. Their decision is final.

The Management of Tennessee National Raceway Inc.

Tennessee National Raceway/ Thunderhill Raceway

MINI STOCK RULES 2015


1. BODIES: 1971- 2004.
           – Any compact or sub-compact front or rear wheel drive must have full stock body, firewall and floor plan.
           – Aluminum bodies OK NO WEDGE TYPE 
              – Trucks are permitted: must be all stock for that vehicle.
           – No extended cab or long bed truck.
           – All parts on racecar must be stock except where noted. Any infraction may require weight penalty.
           – After market hoods and bumpers ok.
           – Radiator protection bar must not be forward of the bumper.
           – Bumpers do not have to be stock, but must not be wider than the fenders.
           – Rear spoilers - ok, 8” maximum.
           – Front and rear wrecker hooks are mandatory, but must not extend past bumper.
           – Cockpit style interior and skirting are permitted.
           – Frames: Unibody must be reinforced - MANDATORY.
           – Racing seat, harness, window net, fire ext. fuel cell, three 3/8 rods in front of driver, full fire suit, and
             approved helmet. (Required at all times)
2. SUSPENSION:  must be stock type.
           – After market type springs and shocks ok. Must be in stock location.
           – Alternations of upper or lower control arms and spring buckets are not permitted.
           – Cars with leaf springs may have adjustable shackled- sliders on each leaf spring.
           – Jack bolts all four corners will be allowed.
3.  WHEELS:  Steel - 8” width max. Off set permitted.
           – Bead locks-right side only but not mandatory.
4.  TIRES: 8” 60 series street radials only.  No racing tires, recaps, etc.  No 50 series tires.
5.  ENGINES: 2300 cc max.   
              – Rods – 5.2 or 5.4
              – Stock  Crank
              – Pistons – Cast – Hypertectic Coating is allowed   
           – Any hydraulic cam and lifter is okay
              – No roller cam or lifter of any type
              – No dual overhead cams   – Heads: decking of head is okay –No porting or polishing of head of intake
              – Valves must be stock size for head
              – Heads can be bow cut ¾” from seat of valve (no tolerance on bow cut)
  – Intake:
              – Fuel injected intakes allowed
              – No porting or polishing
              – No After Market intakes
  –1” Adapter – No tolerance
  – Maximum compression 170 
6.  Electric fuel pumps will be allowed but must have shut off going to oil pressure switch and approved by Tech 
 Any fuel lines that are routed the interior of vehicle must be in solid conduit.
7.  Toyota-Nissan 2000 cc etc.
6. TRANSMISSIONS:  Must be stock OEM type with all working gears in standard shift, automatic transmission must have working torque converter. 
  – Clutch: Factory OEM and fly wheel. 
              –Fly wheel must weigh 13 lbs. min. 
              – Scatter-proof bell housing recommended. 
7.  WEIGHT:  weight of cars after race with driver - 2200 lbs
8.  BRAKES:  Rear disc ok.  Must be OEM rotors & calipers.  After market pedals & master cylinders optional.
9.  Any header.
10.  ANYTHING NOT LISTED WILL BE AT TRACKS DISCRETION BY TECH MAN.  IF IT’S NOT WRITTEN, YOU CAN’T RUN IT!
11.  Track discretion to check any number of cars when track feels it is necessary.
12.  PROTEST RULE: $250.00 – Bore, stroke, and bottom end checked.  $50.00 going to track
*Tech official may penalize any car not conforming to rules with weight*

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TENNESSEE NATIONAL RACEWAY & THUNDERHILL RACEWAY 2015 Schedule is up and will be UPDATED OFTEN as we add specials!



General Admission: Adults $10  * Kids 12 & Under FREE with a paying adult

Pits: Adults $30 * Kids 6-12 $10 * Kids 5 & Under FREE

Gates Open at 3 pm

Drivers meeting 6:30 pm

Racing 7:00 PM

RaceTN.com
RaceTN.com
RaceTN.com Twitter facebook

 next.JPG


TENNESSEE NATIONAL RACEWAY & THUNDERHILL RACEWAY 2015 Schedule is up and will be UPDATED OFTEN as we add specials!



General Admission: Adults $10  * Kids 12 & Under FREE with a paying adult

Pits: Adults $30 * Kids 6-12 $10 * Kids 5 & Under FREE

Gates Open at 3 pm

Drivers meeting 6:30 pm

Racing 7:00 PM

RaceTN.com
RaceTN.com RaceTN.com