Hot Street Rules
HOT STREET is a heads-up class for all types of vehicles without the aide of a power adder. Rear suspension may utilize ladder bar or four-links (no full tube chassis). All entries compete on a Mickey Thompson (29.5 x 10.5 slick or 30 x 13.5 ET Street) or any other brand as long as the tire is not larger (height & width) than the M/T.
Class Guidelines:
                 
BODY:
The car must retain its original appearance and profiles. Aftermarket fiberglass replacement panels are limited to hood, front fenders, doors, deck lid and bumpers. One piece front ends are permitted, but must retain factory un-altered grill, head lights and bumper. 
Front Grille:
Complete factory un-altered grille is required. Grilles may be covered, but with only clear tape or clear Lexan or Plexiglas and must have priorapprval fromm a WCSA official.

FIREWALL:
Must retain in original factory location, and be constructed out of sheet-metal. Notching of factory firewall for valve cover clearance is allowed.
HOOD SCOOPS:
Scoops or cowl may not exceed more than 11 inches at the highest point of the air inlet opening above the height of the original hood surface.

INTERIOR:
Dash board must be stock appearing and in stock location. Carpet and or upholstery is required to cover the flooring and tunnel where visible. Headliner is not required.
REAR WING / SPOILER:
Aftermarket wings and spoilers are permitted, but may not extend more than 16 inches from the transition point with the body to the tip of the wing.
WINDOWS:
Must be of safety glass, Lexan or other shatterproof materials, minimum 1/8th inch thick. Also must be clear and non-hazy.

BRACKET RACING AIDS:
The use of bracket racing aids such as optical sensors, delay boxes, stutter boxes, and throttle stops are not allowed. No object can be mounted anywhere forward of the front of the race tracks timing systems.
                     
CHASSIS / SUSPENSION

FRONT SUBFRAME:
All sub framed or full framed cars must retain complete stock front subframe from firewall forward. Frame connectors or rear frame rails may not pass engine firewall, except for the following exceptions. The 62-67 Chevy II's and 64 1/2-68 Mustangs and similar cars with bolt-on front K-members, must retain stock or aftermarket bolt-on front subframe. The subframe must be a bolt on (not welded, unless kit is OK by WCSA officials) to factory mounting location. Frame connectors or rear frame rails may pass firewall location, but not exceed where original front subframe mounts to the body. All late model Mustangs must retain factory front subframe from firewall forward. Stock or direct fit aftermarket K-members are permitted, but must be bolted in factory location using factory bolt holes. Cross members on all front sub frames may be altered or removed for oil pan clearance.

FRONT SUSPENSION:
All cars must retain stock suspension, aftermarket tubular control arms, coil over kits, or OEM front strut retrofits are permitted but must be a direct bolt on, no welding modifications permitted. Aftermarket racing struts with spindle mounts or hub mounts designed for tube type front ends are prohibited. Stock wheelbase will be enforced on all vehicles.
**The only front suspension bolt-on kit deemed legal by the WCSA are the CHRIS ALSTON "No Fab", AJE, HEIDTS, Smith Racecraf, TCI, and *FATMAN bolt-on kits (Nova's, Camaro's & early Mustangs)  The Rod & Custom Motorsport Mustang II kit for 64 1/2-66 Mustang, Part #RC-106 for late model Mustangs.... Kits must be installed as instructed and not modified.

DRIVE TRAIN
TIRES:
Front tires must have a minimum tread width of 4.5 inches. Front tires do not have to be DOT approved. Rear tires, all entries compete on a Mickey Thompson (29.5 x 10.5 slick or 30 x 13.5 ET Street) or any brand as long as the tire is not larger (height or width). No drag radial tires permitted.
AUTOMATIC TRANSMISSIONS:
Automatic transmission originally produced by any American automobile manufacturer are permitted. Transmission-to-engine adapters are permitted. Aftermarket torque converter, trans-brake, shift kit, valve body, shifter, and pan cooler use are permitted. (*see weight breaks)

MANUAL TRANSMISSION:
*Aftermarket Manual Transmissions (Clutchless Jericho & Liberty versions included) are allowed in Small Block applications only. Lenco, JeffCo, Clutchflites, or Clutch Hydros are not permitted. All shifts must be made manually without the aide of aftermarket electric or pneumatic devices. (*see weight breaks)
WHEELBASE:
Must retain stock wheelbase with a maximum variation from left to right and front to back of one inch.
WHEELIE BARS:
Wheelie bars are permitted.

ENGINE:
There is a 470ci limit for small blocks and a 650ci limit for big blocks. There are no restrictions on internal engine modifications.
EXHAUST:
Production type mufflers or collector type mufflers are required. No collector inserts permitted. Modification or removal of muffler internals is prohibited. (no gutting)
OIL-RETENTION DEVICE:
All Hot Street cars must utilize an NHRA-accepted lower engine oil-retention device; may use a belly pan in lieu of a device attached to the engine. The belly pan must extend from framerail to framerail and extend forward of the harmonic balancer and rearward of the flywheel and must incorporate a minimum 2- inch-high lip on all sides. A nonflammable, oil-absorbent liner mandatory inside of retention device.

ENGINE MOUNT LOCATION:
The maximum allowable engine setback from the center line of the number-one spark-plug hole to the center line of the front spindle is 2 inches, except in those vehicles in which the engine was factory installed at a distance greater than 2 inches behind the spindle. In such cases, the engine set back may be no further back than the original location.

HEADS:
Two valves per cylinder maximum. The following are cylinder head restrictions:
(1) Splayed, symmetrical, or canted valve small block heads. (
*see weight penalty)
(2) Hemispherical heads are prohibited (unless factory or factory style replacement)
(3) One spark plug per cylinder maximum
(4) All billet cylinder head prohibited

EFI:
(Electronic Fuel Injection) Any EFI or digital fuel injection are permitted.

INTAKE MANIFOLD:
No restrictions.* See add weight section.
FUEL
Gasoline & alcohol only... No Nitro Methane allowed. Alcohol may be used with carbs only (cannot be used with any type of fuel injection)

STREET LEGAL REQUIREMENTS:
All entries are required to have two working headlights and two working tail lights (headlight doors must be fixed open or work manually or automatically on cars so equipped). Brake lights, turn signals not required to operate.

RADIATOR:
An automotive-type radiator is required.

HOT STREET WEIGHT GUIDE:
(All weights are race-ready car with driver)
BASE WEIGHT
4 cly
2300lbs
V/6's
2450lbs
SMALL BLOCKS     Up to 329ci............
2450lbs
SMALL BLOCKS     330 - 360ci.............2500lbs
SMALL BLOCKS     361 - 390ci.............2550lbs 
SMALL BLOCKS     391 - 420ci.............
2650lbs
SMALL BLOCKS     421 - 440ci.............
2750lbs
SMALL BLOCKS     441 - 470ci..............2850lbs
BIG BLOCKS          Up to 460ci.............2900lbs
BIG BLOCKS          461 to 480ci............
2950lbs
BIG BLOCKS          481 to 510ci............3000lbs
BIG BLOCKS          511 to 555ci............3050lbs
BIG BLOCKS          556 to 600ci............
3100lbs
BIG BLOCKS          601 to 650ci............3200lbs

ADD WEIGHT (In Percent of your Engine Cubic Inch Displacement)
10%  For use of a Sheet Metal, or any Fabricated type Intake Manifold
10%
  For use of a "Dry Sump" Oiling Systems
20%  For Manual Trans (Clutch Version) in Small Blocks
30%
 
For Manual Trans (Clutchless Jericho) in Small Blocks
50%
 
For Manual Trans (G-Force) in Small Blocks
25%
 
Small Blocks using Dart "Little Chief" CFE SBX or Similar Style Heads
10%
 
Small Blocks using CFE "Pro King" or Edelbrock "Victor II"
5%
 
Small Blocks using Yates or Edelbrock High Port (part #'s 6049SC1 & 6049C3H),
20% For Small Blocks not using "True Wedge" or any "In-line Valve" Heads. Example GM Symmetrical, GM "SB-2" Castings, or any GM 15 Degree (GM Part # 24502615) or similar "Comp Eliminator" Style Heads
5%  Big Block Cylinder Heads (That are +/- 3 Degrees From Factory Valve Angle)
10% For Big Block Ford C & E Motorsports Cylinder Head.
20%
For Big Block Ford C & E Pro-Filer Cylinder Head.
20% For Big Blocks that use Big Chief, Big Duke, Pontiac, Olds, Pro Stock Hemi, Symmetrical and/or any non conventional cylinder heads other then listed.
DEDUCT  WEIGHT (In Percent of your Engine Cubic Inch Displacement)
10%  For Single Carburetor Applications
10%  For Pre-74 Full & Mid-size Entries
15%
  For a 2-speed Automatic Transmission (Big Blocks)
20%
  For a 2-speed Automatic Transmission (Small Blocks)
Figuring out your Weight:
This might seem to be complicated, but it really makes for very competitive racing!!! First of all, you need to know how many cubic inches your engine is and a calculator to make it easier... For example you have a 550ci Big Block(3125lbs) with Sheet Metal Intake(+10%), Dry Sump(+10%) and a Power-Glide Transmission(-15%) Total up your weights adds and subtract your weight deducts....You would take your Cubic Inch multiply by the amount Adds or Deducts and come up with your WCSA Race Weight......Example for above... Add 10% + 10% - 15% which equals a total of 5%.. Take that 5%x 550 which equals 27.5lbs, add that to your 3125 Base Weight (27.5 + 3125 ='s 3152.5lbs) Your WCSA RACE WEIGHT WILL BE 3153....We will round up all figures to the nearest pound.