2004 Limited Street Rules

3-Time Limited Street Champion…Mike Saiki

Class Description
Limited Street is a heads-up class for all types of vehicles from 60’s muscle cars to late model
Mustangs and Camaro’s. This class is limited to Small Blocks only. Suspension, both front and
rear must retain stock configuration. Legal power adders include the use of a nitrous oxide single
plate, centrifugal type superchargers, 76 mm or smaller turbocharger. All cars compete on a DOT
approved street slick. 28 x11.5 ET Street or smaller.

Class Guidelines

BALLAST
Permanently attached ballast may be added in a NHRA legal manner. Removable ballast for the
purpose of classification adjustments is limited to 100 lbs. in a NHRA weight box.

BODY

BODY:
The car must retain its original appearance and profiles. Aftermarket fiberglass parts are limited to hoods, rear decklids and front bumpers only. After market fiberglass wings and spoilers are permitted.

LETTERING / DECALS:
Car lettering is limited to windows only. Upper front windshield area must be cleared for Series
Sponsor Windshield Banner.

FIREWALL:
Must retain factory unaltered firewall, in factory location. A cosmetic overlay is permitted.

HOOD / SCOOPS:
Forward facing hood scoops are prohibited, unless factory equipped. Fiberglass replacement
hoods (cowl) are permitted. Cowl hoods are limited to 5 inches in height.

INTERIOR:
All factory interior pieces must be in factory locations. Factory door panels, headliner, carpet,
dashboard are required. Back seat may be deleted, but must have carpet covering the bare floor.

SEAT LOCATION:
Two front bucket seats, or one bench seat with upholstery required. Seats must remain in the
stock location.

WINDOWS:
Must be of safety glass. No Lexan permitted. The only exception will be the rear window of an El
Camino or other truck for roll bar access. All front door windows must be fully operational.

BRACKET RACING AIDS
The use of any bracket racing aids such as optical sensors, delay boxes,  and throttle
stops are prohibited

BRAKES
The braking system may be upgraded to discs or larger drums. All cars must have front and rear
brakes.

CHASSIS / SUSPENSION

FRONT SUSPENSION
All cars must retain factory stock-type suspension. Front frame rails, radiator core support, and
inner fender sheet metal must remain in stock location and must be unaltered. 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.

K-MEMBER
Aftermarket factory-replacement-type K-member permitted, but must attach to the chassis using only the original factory OEM-type mounting bolts. No part of the K-member may be welded to the chassis.

REAR SUSPENSION
All cars must retain stock rear suspension. Bolt on traction devices are permitted. Sway bars may be deleted or added (This includes weld in ANTI-ROLL Bars) Leaf springs may be relocated for tire clearance purposes. Shocks must retain original angle as factory equipped.

FRAME & CHASSIS
Stock frame rails must be retained front and rear and be unaltered. Sub frame connectors are
permitted.

DRIVE TRAIN

AUTOMATIC TRANSMISSIONS:
Any 3 speed or overdrive automatic transmission is allowed. No 2 speed or Powerglides permitted. Aftermarket torque converter, shift kit, valve body, shifter, and pan cooler use are permitted. Trans brakes are not allowed & car will not pass tech if solenoid is attached to trans. No electric or air shifters permitted. All shifts must be made manually.

MANUAL TRANSMISSION:
Factory and Aftermarket manual transmissions are allowed. Clutch-less versions, Jerico, Liberty, or Lenco type transmissions are not permitted. All shifts must be made manually without the aid of electric or pneumatic devices. Also, clutch operation must be manual.
Please call if you plan on using a Manual trans!!

REAREND:
Any factory type rear end is allowed.

ELECTRICAL:
The battery may be relocated. The charging system must be operative and the alternator must be
mounted in the engine compartment. Electric fans allowed.

ENGINE
Small blocks only. There is a 412ci limit. There are no restrictions on internal engine modifications, except for camshafts, see camshaft section in rules. Pontiac and Olds engines are legal under 412ci.

BLOCK:
Aftermarket cast iron production blocks are allowed. Aluminum blocks permitted only on vehicles
that came factory equipped.

CAMSHAFT:
HYDRAULIC ONLY !! No solid or solid roller camshafts permitted. Modifying of hydraulic lifters prohibited. Rev kits of any type strictly prohibited. No Valve Lash Permitted!  ( 0.000″ )

CARBURETOR / THROTTLE BODY:
Carburetor limited to a single conventional 800 cfm(4150 type design). Carburetor is limited to
800cfm MAX. Carb modifications limited to removal of choke horn only. Polishing of ventures, fitting of the throttle shafts, metering and booster plate modification, aftermarket metering blocks, and changing of throttle plate diameter is strictly prohibited. Single carb spacers limited to 1 inch, including nitrous plate. No dominators type carbs allowed. Throttle body limited to a single 80 mm max. Duel throttle bodies legal if factory equipped. Duel throttle body cars will be allowed a 80mm mass air meter.

EFI:
(Electronic Fuel Injection) Factory fuel injection systems with the factory computer must be in use. Commercially available “plug-in” chips are OK. No DFI or aftermarket injection systems permitted, unless factory computer is functional. Laptops used in any manner in a EFI car is not permitted, no EXCEPTIONS. With all the new aftermarket systems continuously being released, please call on any aftermarket system before you enter an event!!

ENGINE MOUNT LOCATION:
Engine must remain in stock location, and must retain factory style engine mounts NO MOTOR
PLATES ALLOWED  Engine mounts may be solid. Engine may not touch the factory unaltered
firewall.

HEADS:
Aftermarket cylinder heads allowed, but must retain the factory valve angle within 2 degrees.
Porting allowed. Welding, epoxy, raised ports, and exotic modifications strictly prohibited. Please call if your heads are not listed here
List of legal heads will be updated as new heads are released.
Edelbrock Victor Jr – Edelbrock Performer – Dart Pro1 – Dart Iron Eagle – Brodix Track 1 – Brodix 10 – Trick Flow 23 degree for Chevy – Trick Flow Track Heat – Trick Flow Twisted Wedge –  World Products S/R Torquers – AFR’s 205, 210,  220 & 227 series
Canfield 20450-58-0-B, GM’s 12464298 & 10125377

INTAKE MANIFOLD:
Carburetor: commercially available, mass-produced cast aluminum single four barrel intakes are
permitted. No Dominator flange manifolds allowed. No sheet metal or other composite manifolds
permitted. EFI may use a Composite upper manifold if factory equipped.

NITROUS:
Nitrous is limited to a conventional single stage plate system or single fogger nozzle, (wet or dry) only.  2 spray bars in the plenum are legal in lieu of nitrous plate, but call for prior approval.  Two solenoids for nitrous system MAX, one nitrous, one gas and a third is permitted only for a purge system. Plate may only use two spray bars, one nitrous, one gas. System can only use one 10lb bottle, with a dash 4 line from bottle to nitrous solenoid. No progressive type controllers allowed.

SUPERCHARGER / TURBOCHARGER:
Single centrifugal supercharger or single turbocharger are permitted. No after or intercoolers Permitted on supercharged entries. Supercharger inlet diameter (external): 4.00-inch maximum. Discharge diameter not to exceed (external) 3.00-inch maximum. No Cog Belt Systems. 8 RIB maximum drive belt of standard width. No Boost controller’s permitted. Roots style up to 177c.i.d. limited to 8 RIB belts. Turbo size is limited to a single 76 mm (turbo is measured from tip to tip on wheel) Intercoolers are allowed on Turbo’s only, with 100lb weight penalty. No Boost Controllers Permitted!!