Racing and Time Trialing are exciting, rewarding, and fun. They do
however, by their nature, involve risk. This guide is intended as nothing
more than a guide. Each entrant and driver takes upon himself or herself
the final responsibility of preparing a car properly, dressing properly, and
acting properly when at the race track. Each driver should be aware of the
dangers of racing or time trialing. Each driver should be aware of the
imminent danger when on the course with other drivers.
This guide was written to clarify the minimum requirements for car
preparation. By no means is this guide the final word. The specifications
published in this guide are the minimum required by EMRA. They are
based on currently available information, minimum standards required by
other organizations, and the previous experiences of EMRA.
It is EMRA's policy to provide a class for any car meeting EMRA race safety standards,
whether listed in the GCR or not. In the case of Production or GT cars formerly listed by
SCCA and subsequently dropped, they shall be classified as last listed, or in the most
nearly equivalent current class. Any car not conforming to the restrictions of any other
category may be classified in Sports/Racing, subject to the ruling of the EMRA Board.
STREET STOCK CATEGORY
IMPORTANT NOTE: UNLESS IT IS SPECIFICALLY STATED THAT
EQUIPMENT OR A MODIFICATION IS PERMITTED, IT CANNOT BE DONE.
WHEN IN DOUBT, DON'T!!!
It is the intent of EMRA that this category is for cars with essentially stock bodies,
drivetrains and chassis having appropriate modifications to allow competitive, safe
racing. The automobiles in the category will be cars as offered for sale in the U.S.
by the factory. The entrant must provide a shop manual to document stock
specifications. The entrant of a streetdriven ST car is responsible for applicable
state and federal safety and smog compliance. Nonperformance comfort and decor
options are allowed.
1.1.2.Cars may be updated or backdated within a model as offered for sale in the U.S. by
authorized dealers except:
a)The engine displacement must match body, chassis and vintage with
respect to model and generation.
b) NO equipment from a version of the model existing in a 'higher' class is
eligible as an update/backdate on the 'lower' class version unless specifically
allowed. (example GTI or Si parts not allowed on non GTI or Si cars). A model
listed separately is 'as is' and separate.
1.1.3 All cars must conform to the safety regulations outlined in the SCCA General
Competition Rules (GCR) under "Automobiles General Regulations", except as
modified by the EMRA Racing Guide.
1.1.4. Although every attempt is made to properly class each car for an event, it is
really the responsibility of the competitors to police and identify improperly classed
cars. EMRA wants to be sure that an individual racer or time trialist knows he/she
can and should report what he/she feels is an incorrect classing to the Chief
Steward, Stewards, or Tech.
1.1.5. EMRA shall continue to inspect cars at impound and Stewards may issue
penalties for infractions found.
Chassis and Coachwork
The use of alternate fasteners such as hood straps, nuts, bolts, studs, gaskets
(except for hood gaskets), seals, washers is allowed, provided that they are of the
same type and dimension as the original and do not improve performance. Hood
pins allowed and encouraged.
Fitting of all accessories, gauges, and indicators in the original stock dashboard,
and any inside modifications for the purpose of improving the comfort and conven
ience of the driver and to permit the installation of the required safety equipment is
allowed, provided they have no influence whatever on the mechanical performance
and do not materially, reduce the weight of the car. All flammable material in the
immediate area of the gas tank or fuel filler (i.e. trunk or rear of hatchback) should
be removed. Any floor covering and sound deadening material held in place by
removable and replaceable fasteners (snaps or clips), may be removed. Seat head
rests may be removed1 and seat mounts may be reinforced. Removal of interior trim
(gutting) is not permitted. Front seats may be changed, but not removed. The rear
seat and or seat back may be removed. Headliners may be removed. Seatbacks
(especially plastic/fiberglass) should be mounted to rollcage.
The radio may be removed. The windshield wiper blades and arms only may be
removed. The heater may be bypassed, but may not be removed if it was original
standard equipment. Defrosters should be kept functional.
Bumpers with all attaching/projecting hardware may be removed. A substitute
bumper may be fitted which is lighter and more fragile than the original provided
its ends turn into the body (within 1 inch), has no projecting hardware, and is
BOLTED on so that it can be removed should it be deemed unsatisfactory or unsafe
by the Tech Inspector. Trailer balls must be removed. Trailer hitches are
Any alteration or modification of the shape or contour of any interior or exterior
body panel is prohibited unless specifically allowed. Fender flares are permitted.
On closed cars, the driver's door window must be fully lowered. In open cars or cars
with removed roof panels, all movable windows must be lowered. Tops must either
be removed from open cars or folded and secured. Tonneau covers must be
removed. Targa tops, or removable roof panels that are not glass may be retained if
they are securely bolted, pinned or strapped in place. Time Trial cars must lower
both door windows.
Class designation insignia will be the class number or letter preceded by the letters
"ST" displayed on both sides of the car. The "EMRA" logo must be clearly displayed
on both sides of the car.
The driver's seat must have a head rest capable of withstanding a severe impact. If the
stock seat is retained, the original head rest must be also be retained.
A front spoiler or air dam must be no lower than the bottom of the wheel rim, must
not extend beyond the body perimeter, and whenever possible must be mounted to
the car at a point no higher than the wheel centerline. Headlight bulb/lens
assemblies (but not bucket/mounts) may be replaced with suitable metal covers.
A rear spoiler may be added, with a maximum height of 6 inches. It must be no
wider than the body and there must be no overhang. No wings are allowed unless
Any chassis structural modification required to repair an existing failure is
permitted, provided it does not significantly improve the vehicle performance
beyond original factory specifications.
The battery may be relocated, provided it is mounted on a stock surface and cannot
spill into the passenger compartment in an accident situation.
Allowable exceptions: see "STREET STOCK EXCEPTIONS".
Wheels, Tires, and Suspension
Tires must be DOT approved street type (see 2.3.6 concerning ride height). The
complete width of the tire tread must be visible at tech inspection. Tires on a given
axle must be the same size. When viewed from above, the entire width of the tread,
at the vertical centerline of the tire must be enclosed within the bodywork.
Steel or alloy wheels may be used. Cars with stock 10 to 12 inch diameter wheels
may use 13 inch wheels. Cars originally equipped with metric 390 mm wheels may
use 15 inch diameter wheels. All other cars must use stock diameter wheels. A car
may use a wheel SMALLER in diameter than stock without taking a class bump.
Maximum wheel widths are as follows, unless stock is wider:
STGT 9" ST3 7"
ST1 8" ST4 6.5"
ST2 7" ST5 6"
Camber compensators or limit straps must be used on cars with swing axles; in this
case any change in ride height due to decambering will be permitted.
Any shock absorber may be used, providing it is of the same type as the original
equipment and its mounting points are unchanged. Lever shocks may be replaced
with tubular shocks where this type of conversion is demonstrably less expensive
than maintaining the original equipment.
Any sway bars may be used. Additional locating links (e.g. traction bars, panhard
rods) may be added to solid axles.
Any springs may be used, provided they are of the same type as OEM and their
mounting points are unchanged. The minimum ride height is 4" at the rocker panel
behind the front wheels.
An increase in track dimensions may not exceed 2" with spacers no thicker than
Alternate bushing material or spherical rod ends may be used in original locations.
Camber plates may be used.
Ford Maverick (6 cyl. only) may run 7" wheels in ST4 or ST5.
Strut braces, front and/or rear, upper and/or lower are permitted. Rear bracing must be
bolt in only (no welding) and must be on a horizontal plane only. There must be no
connection between the upper and lower braces. See "ROLL CAGE"
Allowable exceptions: see "STREET STOCK EXCEPTIONS".
Engine and Drive Train
Ignition systems are free. However, the spark must be triggered and distributed by
an engine driven distributor, unless OEM ignition uses a DIS or crank triggered
unit. Note: A two distributor Mazda RX2 is permitted to run a Mazda single
A maximum of .040" wear limit is allowed on cylinders, and .060" over 25 years old.
Air cleaners are free, but no horns, tubes, or extensions, other than OEM may be
attached to the inlet system. Jetting, needles, or injectors may be changed.
Carburetor throttle springs and injector throttle body return springs may be
changed or altered. A minimum of two return springs is required.
The maximum allowable compression ratio is 10.5:1 or stock, if stock is higher. Any
head gasket may be used.
The oil system is free. An oil filter may be added, removed, or relocated.
The muffler and/or catalytic converter may be removed or replaced. Exhaust
system routing may be changed, provided that the exhaust exits outside the
perimeter of the car and behind a point halfway between the axle centerlines.
Under all circumstances the exhaust must exit behind the driver.
For carbureted cars only, the use of an aftermarket header and an aftermarket bolt
on carburetor is permitted. A bolt on carburetor is defined as being the same type
(down or side draft), same number of barrels/venturis, and mounted to the stock
intake manifold using a suitable adaptor.
Note: Cars with single barrel carburetors can run double barrel carburetors on the
stock manifold with the appropriate adaptor, unless noted otherwise.
For fuel injected cars only, use of an aftermarket exhaust header or an aftermarket
air flow meter/throttle body, BUT NOT BOTH, is permitted. Throttle body and
airflow sensor must remain stock (within the limits of update/backdate rules), but
sensor reading to computer, or computer, may be modified for the purpose of timing
and/or mixture adjustments. Injectors may be changed.
Any radiator is permitted in the original location, with no modifications to the mounting
bulkhead. The cooling fan may be removed or replaced.
The fuel pump is free, provided it is mounted and plumbed safely.
Manifold/cylinder head port matching is permitted providing that no material is
removed further than 1" from the manifold mounting face. No other
porting/polishing is allowed. Porting/Polishing/matching is prohibited on rotary
Updating/Backdating of final drive ratios (ring and pinion gears only) and of cylinder
heads (same number and size of valves, same number of ports, cams, and belts,from
same or lower class) from the same manufacturer which will bolt in/on with no
machining is permitted.
Adjustable camshaft timing pulleys are permitted.
Limited slip or welded differentials are allowed.
Alternate engine pulleys are permitted.
Allowable exceptions: see "STREET STOCK EXCEPTIONS".
Any brake lining material may be used. Dual master cylinders may be fitted. Safety
brakes may be added. Backing plates and dust shields may be modified. Brake
ducting is permitted, but the inlet opening must not penetrate any original exterior
body panel above the axle centerline, nor replace any original lighting equipment.
Rotors, drums, and calipers must be stock.
1.5.2Allowable exceptions: see "STREET STOCK EXCEPTIONS".
1.6 ROLL CAGE (Street Stock Only)
NOTE ALL ST ROLL CAGE ALLOWANCES ARE IN ADDITION TO, NOT
INSTEAD OF, THE MINIMUM REQUIREMENTS STATED IN THE EMRA RACING
GUIDE SECTION 16. ALL WORK MUST BE OF HIGHEST QUALITY AND IS
SUBJECT TO APPROVAL BY THE CHIEF OF TECH.
1.6.1. Roll cage structure within the passenger compartment/trunk is free with respect
to number of attachment points to the car and number of tubes.
1.6.2. Doors may be gutted, including glass, to provide room for the installation of
NASCAR style door bars. Such bars must be same size and wall thickness as main
cage hoop and must consist of minimum two horizantal bars with mimimum of
three vertical reinforcements. Door gutting is not allowed unless these door
bars are installed.
1.6.3. Front structure may be reinforced with unlimited number of members, welded or
bolted, behind front axle centerline, triangulation allowed, provided no original
structure or panels are removed. Such structure may be attached to the roll
1.7 ALLOWABLE EXCEPTIONS!!
ST2, ST3, ST4, ST5 cars having one (1) but not more than three (3) of the following
exceptions can remain in ST category, but will be reclassified one class higher.
ST1 cars having one (1) but not more than five (5) of the following exceptions can
remain in ST but will be reclassified one class higher. ST1 race cars moving to STGT
must be equipped with an approved fuel cell.
STGT having one (1) or more exceptions must move out of category.
1.7.1. Wheels of a different diameter than stock.
1.7.2. Track more than 2" wider than stock.
1.7.3. Removal of a bolt on windshield.
1.7.4. For fuel injected cars only, use of an aftermarket exhaust header and an
aftermarket air flow meter or throttle bodycounts as one exception.
1.7.5. An engine swap from the same manufacturer, provided the number of
cylinders or rotor chambers, valves, cams and cam configuaration and type of
induction remains the same and the number of gear ratios remains the same will
bump one class with two more exceptions allowed. If an engine or transmission
swap from the same manufacturer moves a car into a faster class where that
car/engine combination already exists, the car will not be allowed any more
1.7.6. A car fitted with an aftermarket turbocharger or supercharger will move up
two classes. The car may also take up to two more allowable exceptions, unless it is
equipped with an intercooler. Intercooled cars may not take any more exceptions.
1.7.7. Non stock brakes, front and/or rear. Counts as two exceptions.
1.7.8. Aftermarket/Alternate camshaft(s). Counts as three exceptions. May use standard
ratio roller rockers.
1.7.9. Standard ratio roller rockers count as one exception..
1.7.10.Aftermarket/Alternate intake manifold. Counts as two exceptions.
1.7.11.Multiple carburetors on a car which had only one carburetor OEM is a two class
bump with two further exceptions allowed to be taken in the new class.
1.7.12.A factory turbocharged or supercharged car equipped with a nonOEM intercooler
or adjustable boost or aftermarket /modified wastegate. Each one of these items
counts as one exception.
1.7.13.NOTE: TIME TRIAL CARS ONLY; IF A CAR TAKES A BUMP OF TWO OR
MORE CLASSES, AND/OR COMPETES IN PRODUCTION OR GT CATEGORY,
IT MUST HAVE A COMPETITION ROLL BAR, A FIVE POINT HARNESS, AND
A FIRE EXTINGUISHER, OR IT MAY NOT COMPETE.
1.7.14.Gutted interior counts as one exception.
SHOWROOM STOCK CATEGORY
SS in EMRA is as per the SCCA with respects to car classification and preparation.
EMRA defines a Club Ford as being a legal Formula Ford with at least one end having
outboard suspension. Hoosier 60, Goodyear R600 or harder compound equivalent tires
are the legal tires for EMRA for the 2000 season. Any rain tire may be used.
Preparation rules for Spec Racers are as per the SCCA except that SR Renault will be
>> SCCA American Sedan, World Challenge, Escort, and other professional series,
fully meeting their respective rules exclusively, will be allowed to run in EMRA as ST
class cars, but one class higher. Cars prepared to American Sedan and entered as such
will be allowed to run that class in EMRA without current SCCA logbooks provided they
meet EMRA safety specs.
EMRA recognizes SCCA Formula, GT, Production, and Sports Racers. EMRA also
recognizes IMSA classes.
ST Car Classifications
Note: Cars which run in a class requiring use of specific equipment, must use that
equipment. Examples are:
1) 2v V8 in ST2 must use OEM carb
2) Up to1700 VW in ST4 may not use any GTI equipment
* = not listed elsewhere, NT = Not Turbocharged T=turbocharged
Acura NSX V6 *All V8
BMW 6cylM, 8 series Acura Integra 1994 on
BMW 2cam 6 cyl * BMW M series(4 cyl), 7 series
Consulier BMW 6 cyl., 1cam, except M
Camaro LT1 Chevrolet Typhoon Truck
Corvette '84 & newer * Datsun 240Z, 280Z, 300ZX
Dodge Stealth/ Mitsubishi 3000GT (T) Dodge 16V 4 cyl T
Ford Mustang Cobra R Dodge Stealth/Mitsub. 3000 (V6, 24V NT)
Ferrari,8 & more cyl Ford Mustang SVO, T Bird SC
Lamborghini Ford Probe T, and v6
Lotus Esprit T Honda Del Sol VTEC
Maserati 8 cyl and up 2 door Lotus Esprit, 7 and Europa, twin cam
Mazda RX7 Twin Turbo 1993 > *Mazda RX7 Turbo
Nissan 300ZX T '89 & newer *Mazda RX7 '86 on
Porsche Turbo, 928S4,944 16v, 911>2.5l Mazda MX6 T, and v6
Renault R5 intercool Mitsub. Starion intercool T
Talon: (T 2WD & 4WD)
Nissan 300 ZX 89 on, 300ZX T 88 & older
*Porsche 924S,944, other 6&8 cyl NT
Saab 9000 T 16v
*Toyota 4V/cyl T
Toyota MR2 T
VW Corrado G60
VW Corrado, Golf, Jetta VR6
Volvo 240/700/850, T intercool
*All turbo: 18002500cc (2V/cyl) * 15001800cc 16V 4 cyl
15002000cc (4V/cyl) * 18002400cc sohc 4 cyl 8/12V NT
*All Alfa Romeo * 6 cyl pushrod NT
Alfa Romeo V6 NT * GM and FORD pushrod V6 FWD
*OHC 6 cyl * Chrysler V6 FWD
*Acura Integra Alfa 1600 2bbl X 2
*American pushrod V8 w/2 bbl OEM Audi 5000 T (10v)
Audi 5000 T 20v, Quattro, Coupe *Audi 5 cyl NT
BMW 318i 16v, 2002 tii BMW 318i/320i 8v, 2002
Chrysler 4 cyl T, Neon DOHC * Chrysler 2.5 NT, Colt 8V T
Datsun 260Z, 280ZX Datsun 510, 610, 710, 200SX 2.0l NT
Ford Taurus SHO * Fiat 124 DOHC,131 2.0
Ford Escort GT 16v * Ford 4 cyl T no intercooler
Honda CRX 16v si Ford Capri, Mustang 2.6/2.8
Honda Civic 16v si * GM 4 cyl T
Honda Prelude si 19921993 GM Skyhawk/Monza, V6
Honda Del Sol Si Geo Storm 16v
Lotus Elan * Honda Prelude/Accord 4cyl
Lotus 7 and Europa, pushrod Honda CRX/ Civic, 1500si
* Mazda V6 Isuzu Impulse
Mazda RX2, RX3, RX4 * Isuzu 16v
Mazda RX7 '79'85 12A rotary * Mazda MX6, 626 4cyl nt fwd
Mazda RX7 '84'85 GSLSE * Mazda MX3, 323 1600 16v
Mazda Miata <=1993 Mazda Protege 1cam
Mazda Miata 1994>= Mitsu Eclipse/Plymouth Laser NT
Mazda GLC 16v 4wd Neon SOHC
Mazda Protege, Mecury Tracer, 2 cam Nissan Pulsar 16v
Merkur XR4Ti, Scorpio * Nissan 200 SX, 240SX 12v
*Mitsubishi Turbo Opel all 1900 (German)
Nissan 2.0L & larger 4 cyl 16V Ply/Dodge Arrow/Colt 2000, 2.6
Nissan 200SX T Pontiac Fiero V6
Nissan Maxima SE 24v 1992 on Porsche 924 2.0L
Olds/Chev.(Quad 4) Saab non turbo, 900 16V, 99 EMS, 9000 8V
Peugeot 505 Turbo, V6 Subaru Legacy T and 6 cyl NT
Saturn * Toyota 1.9, 2.0, 2.3
Saab Turbo 99 or 900, 8v * Toyota Corolla 16v, FX16
*Toyota MR2 and SC Volvo 2000 & larger NT
Toyota Supra NT VW Rabbit/Scirocco greater than 1700 8v
Toyota Celica 16v VW Golf/Jetta/Quantum greater than 1700
Triumph TR8 8v
Volvo T no intercooler
VW Golf and Scirocco; 16V
* 15002000cc sohc 8/12V 4 cyl * SOHC to 1500cc, pushrod to 1700cc
US inline 6 over 200 c.i.d. U.S. Inline 6 less than 200 c.i.d.
Alfa 1300/1600 2 bbl x 1, Alfetta 4 cyl Audi Fox, 100 LS
Audi 4000 4 cyl, 5000 NT, 2&4wd BMC 1275 cc or less
BMW 16002 Chevy Sprint NT
Chevy Sprint Turbo * Chevy Chevette, Pontiac T1000 except
* Chrysler 2.2l NT 2.5L
Datsun 510 1600 cc Datsun 1200, B210, F10, 210
Fiat X1/9 1500 Fiat Strada
Fiat 131 1.8,124 DOHC <1608 Fiat 124 pushrod
* Ford 2.0, 2.3L NT Fiat X1/9 1300
Ford Fiesta 1.6L Fiat 128
Ford Escort, Lynx, EXP, LN7 1.9L Ford Festiva
* GM 4 cyl. NT Ford EXP/LN7,Escort, Lynx 1.6 carb
Honda Civic 1500 carb 1980 on,CRX 1300 Honda Accord/Prelude 1750 CVCC 1 carb
* Honda CRX/Civic with TBI * Honda Civic '73'79
Hyundai Sonata V6 Honda Civic 1500 8891 4spd
* Isuzu 8v Hyundai Scoupe
* Mazda 626 4cyl carburetted * Hyundai
Mazda FWD GLC MG Midget/AH Sprite 1500 Stromberg x1
Mazda 323 1600 8v '86'94 Mazda 808, GLC
MGB/MGBGT 1.5"x 2 SU Mitsubishi Precis
Mitsubishi Mirage/Colt 8v Mopar Omni/Horizon, 024/TC3,(1.6,1.7)
Mitsubishi Cordia, Tredia 8v NT * Nissan Sentra
Mopar LeBaron/600 2.2/2.5 NT * Nissan Pulsar NT
Mopar/ Mitsu 1600cc 8V NT * Renault
Nissan Stanza,8V Pulsar T Renault Fuego 1600
Nissan Sentra, Pulsar 12v Saab 93,95,96
Nissan 200 SX 1800cc Saab Sonnet
Pontiac Fiero 4 cyl. * Subaru
Renault Alliance, Encore 1700 *Toyota FWD Corolla '84'86
Renault Fuego 2200 Toyota Starlet, Tercel
* Saab 99, 900 8v NT Triumph Spitfire 1300 2x1.25" SU or
Subaru Legacy NT, Subaru Turbo XT 1500 w/ 1bbl carb.
* Subaru Turbo 4cyl VW Beetle, Karman Ghia,411
Suzuki Swift GTi Yugo All
Toyota 4 cyl Corona, pushrod Corolla
Toyoa Paseo We will be adding new cars and
VW Rabbit 1.7L & less NO GTI parts streamlining as manufacturers designations
VW Scirocco 1.7L & less NO GTI parts get straightened out. If there are gross
VW Dasher errors or inconsistencies, we apologize, but
Volvo 1800 & less don't let it slide, please call Dave Warburton
at (516) 4752626.