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Class Description
Limited Street is a heads-up class for all types of vehicles from
60's muscle cars to a late model
Mustang, Camaro or Supra. This class is limited to small blocks
and conventional headed big blocks. Suspension, both front and
rear must retain stock configuration. Legal power adders include the use
of a nitrous oxide, centrifugal type superchargers and 80 mm or smaller
turbocharger. All cars compete on an
approved 28x10.5 Slick or 28 x11.5 ET Street Tire.
Class Guidelines
BODY
BODY:
The car must retain its
original appearance and
profiles. Aftermarket
fiberglass parts are limited
to hoods, front fenders, rear
deck lids and bumpers
only. After market wings and
spoilers are permitted.
LETTERING / DECALS:
Car lettering & Decals are allowed on all windows (Except where PSCA
Class & Series Decals are required) 1 major sponsor decal will be
allowed on the rear quarter panel, deck-lid or door (Not to exceed 250sq
Inches per side) and Hood Scoop or Cowl area (Not to exceed 50sq
Inches per side) Limited Street Class sponsor decal (SCE Gaskets) must
be placed in the lower passenger corner of the front windshield PSCA
Series Sponsor decal (Chassisworks) must be placed in the lower passenger
corner of the front windshield..
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 (Scoop can be no larger than what came stock on that year
vehicle). Fiberglass replacement hoods (cowl) are permitted. Cowl hoods are limited to
6 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. The
only exception will be the
rear window. 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 (trimming for header clearance permitted).
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.
Aftermarket Bolt-on Front End kits that use
a strut to replace an a-arm type suspension for early Camaro, Nova/Chevy
II, Mustang, etc..are permitted (Chris Alston, Smith Racecraft, Fat Man,
Heidts, Scotts Hot Rods, T.C.I., etc..)
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. Mini-Tubs are
permitted. Shocks must retain
original angle as factory
equipped.
FRAME & CHASSIS
Stock frame rails must be retained front and rear in the
factory locations.
Sub frame connectors are
permitted. Rear frame notching permitted for tire clearance
permitted.
DRIVE TRAIN
AUTOMATIC TRANSMISSIONS:
Any 2 or 3 speed or overdrive automatic transmission is allowed.
Aftermarket torque converter, shift kit, valve body, shifter, and pan cooler use are permitted. Trans
brakes are allowed. No electric or air shifters permitted. All shifts must be made manually.
MANUAL TRANSMISSION:
Factory and Aftermarket manual
transmissions are allowed.
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 with
Single Disc Clutch Only
REAREND:
Any factory type rear end is allowed.
ELECTRICAL:
No
Restrictions
ENGINE
Small blocks are limited to a 440ci & Big Blocks are limited
to 570ci (Standard Deck Blocks Only) at different weight breaks (see
below). Pontiac and Olds
engines are considered Small Blocks if 440ci and under.
ENGINE OILING SYSTEM
Dry sumps are prohibited on
all engines except GM LS &
Ford Mod Motors (see adds
below in weight section). The
front cross member may be
altered for oil pan removal.
Vacuum pumps are acceptable.
ENGINE MOUNTING LOCATION:
Engine must remain in stock
location, MOTOR PLATES
ALLOWED. Engine may
not touch the factory
unaltered firewall.
ENGINE OIL-RETENTION DEVICE:
All Limited Street Cars will
be required to utilize an
NHRA-accepted lower engine
oil-retention device.
SFI Spec 7.1 or 7.2 Lower Engine Containment Device
permitted. The lower engine
containment device must cover
the sides of the block and pan
up to one inch of the head
mating surface and extend
within 1 1/2 inches of the
front and rear of the cylinder
case area. A belly pan may be
used in the 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 to the rear of
the engine block and must
incorporate a minimum
2-inch-high lip on all sides.
A nonflammable, oil-absorbent
liner mandatory inside of
retention device. Any device
that fails to perform as
required must be replaced or
repaired to the satisfaction
of the technical staff prior
to any further runs.
BLOCK:
Aftermarket cast iron
production blocks are allowed.
Factory "Mass Produced"
Aluminum OEM blocks
permitted.. Cross-Breeding OK
CAMSHAFT:
No Restrictions
CARBURETOR / THROTTLE BODY:
Carb is limited to a single
conventional (non-billet main
body) 4150 design (No
Dominators style permitted)
Throttle Body is limited to
a single 90mm
CARBURETOR / THROTTLE BODY
SPACER:
If a spacer or nitrous plate
is used between the intake
manifold and carburetor the
max thickness permitted is
2inches (Includes both N20
plate and carb spacer
combined)
EFI:
(Electronic Fuel Injection)
Aftermarket Fuel Injection
Systems permitted with weight
add (See Weight Section Below)
CYLINDER HEADS:
Most aftermarket
conventional cylinder
heads allowed (see weight ads) but with the
following restrictions.. SBC
is limited to 18-degree, SBF
is Limited to 15-degree and LS
is limited to 11-degree valve
angle MIN. No Canted or
Splayed valve, No Big or
Little Chief and no Billet
Heads allowed. Big
Blocks limited to conventional
heads with factory
valve angle specs +/- 1 degree
/
Small
Block Boost Combo's are
limited to
Cylinder Heads within 1 degree
of factory valve angle specs
(Chevy is 23 / Ford is 20 / LS
is 15 degrees stock ) see
weight section below...
INTAKE MANIFOLD -
Carburetor:
Commercially available,
mass-produced cast aluminum
single four barrel (4150
design) intakes are
permitted. No Dominator flange
(4500) with adaptor to (4150)
permitted. No sheet metal or
other composite manifolds
permitted.
INTAKE MANIFOLD -
EFI:
EFI may use a Composite upper
manifold on a factory equipped
cast lower. Carb to EFI
conversion manifolds are legal
(example Edelbrock part #
29245)
NITROUS:
Nitrous is limited to two
solenoids (1 Gas & 1
Nitrous), One 10lb bottle,
with a dash 4 (Traditional
Braided) line from bottle to
nitrous solenoid (Min 6ft).
No
progressive type controllers
of any kind are permitted.
"Push
Systems" are not
permitted.
Purge system is legal, however
nitrous must exit into
atmosphere outside of the
engine compartment.
4 & 6 Cylinder combo's that
use nitrous in addition to a
turbo or blower are limited to
a single conventional fogger
nozzle ONLY (Please see weight
adds below)
TURBOCHARGER:
Single Turbo size is limited
to a single
TRUE 80mm
permitted on small blocks only
(Please see below
for measuring procedures).
No
Boost Controllers of any
design Permitted (No
exceptions)
Accepted Single Turbochargers:
76mm Single
Turbochargers are permitted
on
V6 and Small Block V8 engines
in accordance with the
following
requirements: 1)
Turbocharger must be of
conventional impeller and
housing design and type.
2) Turbocharger is limited
to a maximum size
of 2.99251 inches (76mm)
inducer diameter at the point
where the leading
edge of the compressor wheel
meets the inlet housing. 3)
Compressor
cover inlet is permitted a
maximum inlet diameter of
3.08351 inches
(78.3214mm) 4)
Compressor Wheel to housing
clearance must maintain a
maximum 0.091 (2.3114mm)
clearance beginning from a)
the leading edge
of the compressor wheel where
it meets the inlet of the
compressor
housing, to b) the transition
point where the trailing edge
of the
compressor wheel meets the
volute. 5) All air
entering the
turbocharger must pass
through the turbocharger
inlet. 6) Injection of
any liquid, gas, or any other
substance into the inlet or
exhaust
housing prohibited. 7)
Compressor wheel contour must
be continuous
features from the inducer to
the exducer (no "stepped"
wheels).
Accepted Single Turbochargers:
80mm Single
Turbochargers are permitted
on
V6 and Small Block V8 engines
in accordance with the
following
requirements: 1)
Turbocharger must be of
conventional impeller and
housing design and type.
2) Turbocharger is limited
to a maximum size
of 3.14960 inches (80mm)
inducer diameter at the point
where the leading
edge of the compressor wheel
meets the inlet housing. 3)
Compressor
cover inlet is permitted a
maximum inlet diameter of
3.24060 inches
(82.3114mm) 4)
Compressor Wheel to housing
clearance must maintain a
maximum 0.091 (2.3114mm)
clearance beginning from a)
the leading edge
of the compressor wheel where
it meets the inlet of the
compressor
housing, to b) the transition
point where the trailing edge
of the
compressor wheel meets the
volute. 5) All air
entering the
turbocharger must pass
through the turbocharger
inlet. 6) Injection of
any liquid, gas, or any other
substance into the inlet or
exhaust
housing prohibited. 7)
Compressor wheel contour must
be continuous
features from the inducer to
the exducer (no "stepped"
wheels).
SUPERCHARGER:
Single centrifugal
supercharger permitted on
small blocks only (Super
Chargers must be belt
driven...) See Accepted
Super Charger list below.
No Boost Controllers of any
design Permitted (no
exceptions)
Roots style up to 177c.i.d.
Accepted Superchargers -
Current list of
superchargers which fit within
the
Limited Street approved
"spec".
Vortech A,B,S,T-trim
Supercharger Systems*
Vortech YS & YSI-trim
Supercharger Systems
ATI P600*
ATI D-1, D-1SC, D-1R, F1, F1A,
F1C
ATI P-1SC, P-1SCH
Paxton SN, VR4-series*
Paxton Novi 1000*, 2000
Powerdyne*
SVO*
KB Whipplecharger*
Saleen*
Eaton*
*Superchargers permitted
100-LB. weight break.
New
superchargers will be
evaluated as they are
released, and must be
submitted for approval by
manufacturer to PSCA Director
in writing.
EXHAUST
Production type mufflers are
required. No collector
inserts, or collector mufflers
permitted. Modification or
removal of muffler internals
is prohibited (no gutting).
Exhaust must extend to rear
axle.
FUEL / FUEL SYSTEMS
Gasoline, E85 & Race Gas only (No
Alcohol or Nitro) The
PSCA
reserves the right to check
gasoline at any time during
competition. The addition of
chemical additives intended to
alter the makeup of the
gasoline for increased
performance is strictly
prohibited. During fuel check,
a competitor must identify the
brand of gasoline being used.
The sample will be considered
illegal if it does not match
the baseline results (ex.
color, dielectric reading
+or-.2, and chemical tests)
logged by
PSCA. Failure to
pass fuel check is grounds for
disallowance of the run during
qualifying and
disqualification from the
event during eliminations.
IGNITION
Programmable ignition systems
permitted (example..MSD
Digital-7 Programmable, PMS &
Ford EPEC Systems) Crank
triggers are permitted. 2 & 3
step modules are allowed.
TRACTION CONTROL:
Not Permitted.
ON BOARD DIAGNOSTICS / DATA
RECORDERS
No Restriction
STREET LEGAL REQUIREMENTS
All cars are required to have
working headlights and tail
lights (headlights doors must
be fixed open or work manually
or automatically on cars so
equipped).
Headlights may not be removed
for air inlet!!
TIRES
Front tires must have a
minimum tread width of 4.5
inches. Front tires do not
have to be DOT
approved. Rear tires must be
M/T 28x10.5 (No W's) slick,
28x11.5 ET Street &
Goodyear D2791 or smaller
(Height & Width)
M/T ET
Street Radials or a Drag
Radial Tire of any size is not
permitted. As soon as
we evaluate other brands of
28x10.5 slicks, we will add
them to the rules
LIMITED STREET WEIGHT GUIDE:
(All weights are race-ready
car with driver)
4 & 6 CYLINDER SECTION:
4 or 6 cyl - Turbo or
Supercharged /
3200lbs
4 or 6 cyl - Turbo or
Supercharged w-nitrous /
3350lbs (Single
Fogger Nozzle Only, see
nitrous section)
SMALL BLOCK SECTION:
SMALL BLOCK - Naturally
Aspirated /
2600lbs
SMALL BLOCK - Nitrous Assisted
up to 415ci
/
3150lbs
SMALL BLOCK - Nitrous Assisted
416ci - 440max
/
3200lbs
SMALL BLOCK - Supercharged
415ci max /
3200lbs
SMALL BLOCK -
Turbocharged
415ci max up to
True 76mm /
3100lbs
SMALL BLOCK - Turbocharged
415ci max from 76.01mm -
True 80mm Max /
3250lbs
BIG BLOCK SECTION:
BIG BLOCK - Naturally
Aspirated up to 530ci /
3000lbs
BIG BLOCK -
Naturally Aspirated
531ci - 570ci MAX
/
3050lbs
BIG BLOCK - Nitrous Assisted
up to 530ci /
3500lbs
BIG BLOCK - Nitrous Assisted
531ci - 570ci MAX /
3550lbs
WEIGHT ADD
Add 50 lbs.
For Aftermarket Fuel
Injection Systems
Add
100 lbs.
LS1 Heads to 11-degree &
Aftermarket Direct
Replacement Cleveland Heads
Add 150 lbs.
GM Heads 18-degree & Ford
15-degree
WEIGHT DEDUCT
Deduct 100 lbs.
For
V/8's 310ci or Smaller Engines
Deduct 100 lbs. Small Super Chargers (See Super Charger
Section)
WHEEL BASE
Must retain stock wheel base
with a maximum variation right
to left and front to back of
one inch.
WHEELIE BARS
Wheelie bars prohibited.
PSCA Required Decals:
Class Sponsor Decal
SCE Gaskets Decal must be installed on base of windshield on the passenger
side. (Bottom left hand side when looking at front of vehicle
windshield) before entering the tech area..
PSCA Oval Decals
1 PSCA Oval decal must be placed on each side of every car in a
visible location before entering the tech area..
Series Sponsor Decal
Chassisworks decal must be installed on base of windshield on the drivers
side. (Bottom right hand side when looking at front of vehicle
windshield) Contingency Program & Contingency Decals:
In order to become eligible for PSCA official contingency
program, You must first become a member of the PSCA. You can do this at
the PSCA Event Trailer during registration or on-line at the PSCA
Store.
All contingency decals may appear anywhere on the windows in a clear and
organized fashion. Contingency decals may not be overlapped or modified.
Most decals are available at the PSCA Event Trailer, but in the event
the PSCA does not have the decals in stock, it is the racer's
responsibility to obtain the proper decals to be eligible for the
Contingency payout. Penalties For
Violating any PSCA Class or Contingency Rules:
Penalties will vary for any PSCA Class or Contingency Rule violation's from
Championship Point Deduction, Race Suspension, Probation and/or Re-instatement
Fine (Paid to St Jude In the name of the PSCA) If you are in any
violation that directly effects car performance (Example: Over CI,
Illegal Power Adders, etc..) You can receive the Maximum Penalty
(Disqualification from Event with loss of 50 Championship Points,
Two-Race Suspension and a $500 Re-Instatement Donation) You will also be
listed on a Web Page for all to view what violation and penalty any
racer receives..
RACE
DAY POLICY'S
Registering For The Class:
All
Limited
Street Racers must register (Please bring your NHRA Track Tech Card
with you) at the PSCA Event Trailer before taking your car to tech....
Scales:
After each qualifying and elimination
pass, all cars must stop and weigh at the track scales. If you lose in
eliminations, and your opponent fails to make weight you will be
reinstated into the eliminations only if you made minimum weight
requirements. If both cars failed to make minimum weight, both cars will
be disqualified. It is the driver's responsibility to verify with each
track scale, the weight of his/her car prior to each race day. There
will 5lb error factor allowed.
Alternating Lanes During
Qualifying:
Each Limited Street driver must alternate lanes during qualifying. Even if
you skip a session, you must run the opposite lane you made your
previous run in. If you choose to ignore this rule, your second
consecutive pass in the same lane will be disqualified.
Entering into a 2nd Class:
During qualifying, any PSCA racer who purchases a 2nd NHRA Tech Card and
pays entry into an additional class will be able to do so. However, once
your Final Limited Street Qualifying Session is Completed, Driver and Car are no
longer able to make runs in that 2nd class... This also means NO RUNS
(Driver and Car) in
the Sunday Morning Bracket Time Trials Session.
Tow Back & Tow Vehicles:
Limited Street does not allow tow vehicles of any sort in the staging
lanes. All Limited Street vehicles must drive to scales and return to pits
without the aide of any other Motorized Vehicle, Golf Cart, Quad,
Scooter, etc...
Burn-Out Procedure:
Limited Street does not allow burn-outs across the starting line. You must
complete and stop your burn-out without crossing the starting line.
BYE-RUNS:
All vehicles must take the tree, and run down the 1/4 mile (Unless
Broke) and Scale
PAYOUTS:
All Limited Street Racers that earn prize money can go directly to the
PSCA trailer after eliminations and pick up his/her Winnings.
Winners Circle Picture & Contingency Verification:
Limited Street Winner & Runner-up must return to the PSCA Winners Circle
Area for Official Photographs and Contingency Verification. Failing to
do so, will result in loss of all contingency monies earned. There are
no exceptions!!!
PSCA
Race Day Rules and Procedures...Click Here
All
drivers and vehicles must meet current NHRA and track requirements.
For questions or more
information on these rules, please contact Mel Roth at 661-917-3078
#2
In the 2009 Championship Craig Williams
#3 In the 2009 Championship Gary Brandt
#4
In the 2009 Championship Tony Politano
#5
In the 2009 Championship Eddie Rios
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