Limited Late Model Rules

Southern National Motorsports Park will follow the 2017 NASCAR Whelen All American Series Rule Book With the following exceptions.

Tire Rule - 4 Scuffs - (80 Lap Tires) 

1. ENGINE/WEIGHT/CARBURETORS ALLOWED

ENGINE

TOTAL WEIGHT

RIGHT SIDE WEIGHT

CARBURETOR

General Motors 602 Crate Engine

3000

1325

390 CFM Carb w/1” spacer

General Motors 603 Crate Engine

3025

1325

390 CFM Carb w/1” spacer

General Motors 604 Crate Engine

W/ 1.6 Rockers

General Motors 604 Crate Engine

W/ 1.5 Rockers

3100

3075

1400

201375

500 CFM Carb w/no spacer

500 CFM Carb w/no spacer

Ford 347JR Engine

3100

1400

390 CFM Carb w/no spacer

Ford 347SR Engine

3100

1400

450 CFM Carb Combination

NWAAS Built Engine

3100

1400

450 CFM Carb Combination

NWAAS Built Engine

3000

1350

350 CFM Carb w/no spacer

Little Hickory Engine

3100

1400

500 CFM Carb Combination

70cc Dillon (DMS Spec Engine)

3100

1400

450 CFM Carb Combination

Harrington Enforcer

3100

1400

450 CFM Carb Combination

Clarification: The New 500 CFM Ultra Carburetor Will Not Be Allowed to Compete at All.  Not by itself or as part of the 450 CFM Carb Combination.

CARBURETOR SPACERS

One (1) piece, solid, open aluminum carburetor spacer, One (1) inch thick maximum, may be installed between the intake manifold and carburetor. Maximum paper gasket thickness 0.065”

The spacer must be centered on the intake manifold. No taper, bevels, or any modifications permitted.

Weight - All cars will be weighed with driver in a driving position. (3/4lb per lap will be the fuel burn off calculation)

- Only fuel burn off will be allowed to be calculated back in to the final weight after race. Nothing else will be added.

- Weight of car must be on back of hood for tech purposes.

- Any car competing with dislodged or lost weight may not add it back to make weight requirements after the race.

- All lead weight must be added to chassis securely and marked with car number.

- No tungsten allowed.

Shocks - No canister shocks or cockpit adjustable shocks permitted.

Steel body one way adjustable permitted.

Aluminum nonadjustable shocks permitted.

Claim Rule: Shocks can be claimed for $1000 cash as long as the claim procedures are followed. The only shocks that can be claimed are the Top 5 finishing positions for that event only. The competitor claiming the shocks must finish in the top 5 of the finishing order and behind the competitor whose shocks are being claimed for that event and on the lead lap.

Claim Procedures:

The Competitor claiming the shocks must do the following for the claim to be correctly done:

  • $1000 (cash only)
  • Written statement must be given to the Head Tech within 10 minutes of completion of the last lap of the competitors feature event
  • Written statement must have the following information on it
    • Name of Competitor making claim
    • Finish Position of Competitor making claim
    • Name of Competitor whose shocks are being claimed
    • Finish position of Competitor that shocks are being claimed from

Failure to comply with this claim rule will result in a $1000 fine, loss of purse money and finishing position for that event.

All decisions by the Competition Director are Final.

If any part is found to be illegal the racer will be disqualified for that night and forfeit finishing position and prize money.

LITTLE HICKORY ENGINE GUIDELINES:

NOTE: DUE TO THE GUIEDLINES ONE HOW THIS MOTOR IS BUILT THIS MOTOR WILL BE TORN DOWN AT THE TRACK THAT NIGHT IF IT FINISHES IN THE TOP 3 TO VERIFY THAT IT IS CORRECT

1 - Must be standard factory production engine. 

2 - OEM crank shaft only.  (Minimum 50Lb)

3 - Stock crankshaft with 3.480" stroke and maximum bore size of 4.060. 

4 - No deburring or polishing of crankshaft permitted. 

5 - Balancing only. 

6 - Stock, standard balancer only.

7 - 600 gram piston/pin/ring combo min. (Stock Components – NO CUSTOM MADE PARTS)

8 - 500 gram piston/pin add 50 lbs., 25 each side. 

9 – No dome Pistons.

10 - 5.7 length rod Chevrolet, 6.0 lengths in Ford Chrysler. 

11 - Heads must be standard production. Zero Deck. Chevrolet must be straight plug. Max valve size intake 2.02, exhaust 1.60. 

Ford/Chrysler same as LMSC. 

12 - No Titanium valves or parts. 

13 - Heads min 62cc.

14 - Intake Chevrolet Edelbrock #2101, #2116, or GM casting # 12464340. 

15 - Ford Windsor Edelbrock #M9424-C358.

16 - Cams may be solid or hydraulic but have a min. valve lift of no more than. 475 measured at the valve retainer as engine was raced. No roller cams. 

17 - Roller rockers may be used. 

18 - Headers may be used. (2009) LMSC type only. 

19 - Exhaust pipes must be as (2009) LMSC> 

20 - HEI or MSD ignition allowed. No magnetos. 

21 - 7 1/4” or 5 1/2” clutch allowed. Steel flywheels only.

NOTE: Each team must have a spotter during practice, qualifying, qualifying races and the 150 lap feature. All spotters must scan the Track frequency and are required to have radio contact with the driver and have their car number placed on their back and right arm. It is recommended that the pit crew also have a radio scanner to monitor the Track frequency. The frequency being used will be made available at the Technical Inspection area.