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Hummingbird Speedway

Exciting Saturday Night Dirt Track Racing Action!

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General / Safety
Late Model
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2017 Street Stock Rules
 revised 6/6/2017
  
 

See GENERAL RULES and SAFETY RULES that apply to all classes.
All requirements listed in those sections MUST be met unless an exception is clearly stated.

 
 
CHASSIS/BODY
 
 1. Acceptable vehicles: All North American OEM full frame cars 1965 to present with a minimum wheelbase of 101".  Wheelbase must measure the same on both sides.  No convertibles, trucks, jeeps, station wagons or sport utilities. Uni-body Frames must have tech approval prior to being legal to race.
 
 2. Must have full firewall and floorboards in driver’s compartment.  May be “boxed in” with right side floor pan no higher than window opening.
 
 3. Rear deck must have no more than 2’’ rake (from back to mid plate).  Max deck height is 45’’.
 
 4. Roof raking 2” max.
 
 5. No sideboards or wings of any kind or size.
 
 6. A 6" spoiler will be permitted with a maximum 6" height off the top of the deck.  Spoiler sides may be no longer than 17” and no higher than the spoiler.

 

 7. Body style must be respective to this class and must pass tech inspection approval.
(NO EXCEPTIONS)
 
 8. Plastic or rubber nose and tail piece permitted.  One or two piece.
 
FRAME
 
 9. Frames must be OEM appearing - any alterations must have tech approval.
 
10. Uni-body frames must have 2’’ x 3’’ square tubing joining front and rear frame sections. The Tech Inspector must approve such modifications and agree that it is safe or the car will not be permitted to race.
 
SUSPENSION
 
11. Wheel-base must be within ½” side to side.
 
12. No coil-overs permitted.
 
13. Weight jacks are permitted.
 
14. No driver adjustable components.
 
15. Any coil springs, any shim, or spring spacers are permitted.  Cars must have a minimum of 5 inches ride height from the lowest point of the frame rail.
 
16. Front A-arms OEM or tubular upper and lower will be permitted.
 
17. (Rear) OEM location 4 link only. Mounts on frame must be in stock location, upper and lower.
 
18. Rear lower trailing arm may have multiple hole adjustment on axle. Trailing arm mounts may be no more than 6” from the bottom of the axle tube to the bottom of the mount, that includes shock mount
 
19. Adjustable trailing arms are allowed. Lower arms must be same length on both sides, and upper arms must be the same length on both sides, with no tolerance.
 
20. No adjustable shocks front or rear.
 
STEERING
 
21. Steering components must remain in OEM location for type of chassis used.
 
22. OEM steering boxes only.
 
23. No rack and pinions.
 
24. Steering quickeners allowed.
 
ENGINE/ DRIVETRAIN
 
25. Engine type must match chassis used.
 
26. OEM type ignition system only.
 
27. Maximum engine size is 406 cubic inches. GM 602 and 604 crate engine will be permitted in 2016.
 
28. Furthest forward spark plug may not be any further set back than the center of the upper ball joint in the front suspension.
 
29. No aluminum heads.
 
30. No aluminum blocks.
 
31. No oil dry sumps.
 
32. Roller rockers are permitted.  Roller lifters are permitted.
 
33. Any piston permitted.
 
34. Two or four barrel carburetors only (750CFM) max.
 
35. Two or four barrel cast iron or aluminum intake.
 
36. No more than one inch spacer between carburetor and intake.
 
37. Headers with a maximum 3-1/2 inch exhaust exiting past driver’s compartment.
 
38. Transmissions must be OEM type – automatic or standard.  Racing transmissions will be permitted beginning in 2015.
 
39. Standard must have blow proof /steel bell housing. Except if racing transmission is used (Bert, Brinn, Falcon, etc.).
 
40. Any flywheel.
 
41. Any clutch permitted.
 
42. Automatics allowed-must have working torque convertor with steel scatter shield.
 
43. OEM rears, Ford 9 inch rear, or floaters permitted.
 
44. Standard 5-bolt; no wide-pattern hubs.
 
45. Rears must be locked.

 

46. Cars must start and run under their own power.
 
47. Cars must have working reverse.
 
WEIGHT
 
48. Minimum weight will be 2950 lbs. (with driver) after feature. 602 crate may weigh 2800 lbs.
 
WHEELS/TIRES
 
49. Steel 15’’ racing wheels only.  Max width 10’’.
 
50. Any type of tire, no larger than 1100 series, will be permitted.
 
51. Bead-locks permitted on all four wheels.
 
ROLLCAGE / SAFETY
 
Please read and follow all Safety Rules and Regulations found in the section titled SAFETY RULES!
 
OTHER
 
52. Gas only; no alcohol.
 
53. Must have 4-wheel brakes at all times. No brake shut-offs.