Nmca Eaton Efi Class
CLASS DESIGNATIONS & INDEX
Late Model EFI is designed for Late Model production domestic “hot rod” vehicles
which are OEM-equipped with electronic fuel injections. Late Model EFI approved body styles are permitted. Vehicles must run engine type originally installed in vehicle. Late Model EFI is based on an index which you must choose during the tech-in process or prior to the first scheduled qualifying run. Once a qualifying run has been made, changing your index is prohibited. The closer you qualify to your index, the higher you will qualify. All runs made faster than your index will be disqualified. Late Model EFI racing will be conducted at all drag racing events (see race schedule).
Accepted Products Deadline: NMCA will accept requests from manufacturers to have new products considered for addition to 2011 accepted lists only up until November 10, 2011. After this date, NMCA will consider manufacturer requests for new products for the 2012 season.
Qualifying Information, Ladder Type, & Tree
All Run, NHRA Sportsman Ladder, .500 Pro Tree, Handicap Start.
ELIGIBLE YEAR MODELS AND BODY STYLES
The following is a list of cars/engines, which are allowed to compete in the Late Model EFI class:
Chevrolet Corvette, LS1, LS2, LS3, LS6, LS7, LS9, 1997-current
Chevrolet Camaro, LS1, LS3, L99, 1998-current
Chevrolet SSR, LS2, 2005-2006
Chevrolet Trail Blazer, LS2, 2006-current
Chevrolet SS Silverado 2003-current
Cadillac CTS-V, STS-V, 2004-current
Ford Mustang, 4.6L Modular equipped, 1996-current
Ford Shelby Mustang, 5.4, 2007-current
Ford Lighting, 5.4, 1999-2004
Ford Saleen S331 Super Crew, 2008-current
Ford Marauder, 4.6. 2003-2004
Ford SHO Taurus 2010
Ford T-Bird 1994-Current
Chrysler 300, Hemi V8, 2005-current
Dodge Viper, V10, 1992-current
Dodge Challenger, Hemi V8, 2007-current
Dodge Magnum, Hemi V8, 2005-current
Dodge Charger, Hemi V8, 2006-current
DodgeSRT-10, V10, 2004-2006
Jeep SRT8 Grand Cherokee, Hemi V8 2006-current
Pontiac GTO, LS1/2, 2004-current
Pontiac Trans Am LS1, 1998-2002
Pontiac G8 GT and GXP, 2008-current
LATE MODEL EFI Classes
All LATE MODEL EFI class participants must declare & have posted the LATE
MODEL EFI class of choice prior to the 1st scheduled qualifying run in their respective
eliminator or at the time of technical inspection. If you fail to declare your index, you will
automatically be placed in the “A” index class. No change of class is permitted after the
first scheduled qualifying round for the respective eliminator.
1.1 COOLING SYSTEM
RADIATOR: OEM production-style or aftermarket radiator is required and must be
mounted in stock location. Stock core support is required.
Water pump: Any aftermarket (belt drive or electric drive) pump permitted.
COOLING FANS: Any permitted.
ENGINE: See ELIGIBLE YEAR MODELS AND BODY STYLES. Any internal engine
EXHAUST: All entries allowed to use tubular headers. Adapter plates permitted to bolt
headers to cylinder head. Exhaust must be directed out of car body, away from driver and
1.3a) HEADERS & COLLECTORS: Any headers and/or collectors permitted.
1.3b) EXHAUST TUBING/SIZE: Any tubing size permitted.
1.3c) TAILPIPE & EXHAUST RULES: Not required.
1.3d) MUFFLER REQUIREMENTS: Not required.
1.5 FUEL DELIVERY SYSTEM
DELIVERY SYSTEM: Fuel cells, electric or mechanical fuel pumps, pressure regulators,
and any line size permitted. Fuel pump must shut off with a master electrical switch.
Stock gas tank (if used) must be retained in factory location. Modified fuel pickups &
Aftermarket/fabricated fuel tank or cell permitted. Must be located in trunk area. If tank
or fuel filler is inside trunk, a bulkhead of minimum .032” aluminum or .024” steel must
be used between trunk and driver compartment, and tank must be vented to outside of
car. When used, fuel cells must have a metal box protecting the part of the fuel cell that is
outside the trunk floor. Non-metallic fuel cells or tanks must be grounded to frame. See
NHRA General Regulations Section 1.5.
GASOLINE: Gasoline and E-85 is the only permitted fuel in LATE MODEL EFI classes.
NITROUS OXIDE: Permitted.
1.9 OIL SYSTEM
Oiling System: OEM Style (Wet or Dry Sump, as equipped), required.
BLOCK: Any permitted.
1.16 ENGINE LOCATION\MOUNTS
Engine Location/Mounts (LATE MODEL EFI CLASSES):
HEADS: Aftermarket cylinder heads permitted.
VALVETRAIN: Any valve train permitted.
CARBURETOR (LATE MODEL EFI CLASSES): Prohibited.
1.20 FUEL INJECTION
FUEL INJECTION: Only electronic fuel injection is accepted.
1.21 INTAKE MANIFOLD
INTAKE MANIFOLD: Sheet metal intake prohibited. Manifolds restricted to
commercially available cast or plastic units.
SOLENOIDS: Any accepted.
CLUTCH: Clutch operation must be manually applied and disengaged with foot during
Driveshaft: Any permitted.
REAREND: Any automotive type rearend permitted.
2.12 MANUAL TRANSMISSIONS
MANUAL TRANSMISSION: OEM or aftermarket transmissions with a maximum of 6
forward speeds permitted. Clutchless transmissions prohibited. All shifts must be made
manually without the aid of electric, hydraulic or pneumatic devices. Starting line rev
limiters permitted. Torque converter not permitted with this type transmission.
2.13 PURPOSE BUILT TRANSMISSIONS
PURPOSE BUILT TRANSMISSIONS: Prohibited.
2.14 AUTOMATIC TRANSMISSIONS
(OEM American transmissions or replicas of OEM American transmissions that use
planetary gears) Transbreak Prohibited.
AUTOMATIC TRANSMISSIONS: Automatic transmissions originally produced by any
American automobile manufacturer or replicas of an automatic transmission produced by
any American automobile manufacture (Ex. Deadenbear PG transmission) are accepted.
Transbreak Prohibited. Starting line rev limiters permitted.
3: BRAKES & SUSPENSION
BRAKES: The braking system may be upgraded.
3.2 SHOCK ABSORBERS
SHOCK ABSORBERS: Each vehicle in competition must be equipped with one
operative shock absorber for each sprung wheel. Shock absorbers may be either hydraulic
or friction type, securely mounted and in good working order.
FRONT SUSPENSION: Stock front suspension required. Aftermarket direct replacement
suspension components including A-arms permitted.
REAR SUSPENSION: Stock-type rear suspensions required. Ladder bars, four-links
3.6 WHEELIE BARS
WHELLIE BARS: Wheelie bars prohibited.
FRAME (LATE MODEL EFI CLASSES): Stock frame required but may be
strengthened with the addition of braces and subframe connectors. Back-half chassis and
mini-tubs are prohibited.
4.5 GROUND CLEARANCE
GROUND CLEARANCE: Minimum 3 inches from front of vehicle to 12 inches behind
centerline of front axle; 2 inches for remainder of vehicle, except oil pan and exhaust
WHEELBASE (LATE MODEL EFI CLASSES): Must retain stock wheelbase with a
maximum variation from left to right and front to back of 1 inch. Stock overhangs are
5: TIRES & WHEELS
TIRES: Street type, drag radial, or drag slick tires permitted. Maximum racing tire rear
width is 11.0-inches as measured (slicks) or 345mm with a drag radial or street radial.
The front tires are limited to 4.5-inch minimum tread width. The tread of the tires is not
allowed to protrude outside the exterior bodyline at the top of the tire.
INTERIOR (LATE MODEL EFI CLASSES): Must have full factory seating, upholstery,
and carpeting. Aftermarket upholstered bucket seats permitted. Full dashboard
mandatory. Aftermarket gauges permitted. Rear seat may be removed when roll bar/cage
is installed. Area must be carpeted or upholstered equivalent to factory specifications (no
LATE MODEL EFI CLASSES: Exterior body modifications are permitted.
GRAPHICS/LETTERING: Graphics/lettering for advertising or creative purposes
permitted on entire body.
CONTINGENCY DECALS: In order to be eligible for NMCA official contingency
program, all contingency decals are required to appear only on the rear quarter windows
or rear window in a clear and organized fashion. Contingency decals may not be
overlapped or modified. Other decals and sponsorship (non-contingency) may appear on
bodywork, front end, and on windows.
NMCA REQUIRED DECALS: The following decals are required for competition in
NMCA Windshield Decal – must be installed on top of windshield. This NMCA decal
must be the only decal on top of windshield. Other vehicle sponsor decals may be placed
at base of windshield.
NMCA 2011 Drag Racing Series “Side” Decals – must be installed on each side of
vehicle on quarter windows.
Class Sponsor Decal – class sponsor decal must be installed on base of windshield on the
Permanent Numbers – permanent numbers are required for competition in this class.
7.2 SPOILERS, WINGS
SPOILERS, WINGS: Aftermarket wings and/or spoilers permitted.
FIREWALLS: Stock firewall in stock location mandatory.
7.6 FLOOR/TRUNK PAN
FLOOR/TRUNK PAN: Complete stock floor in stock location mandatory. Floor/Trunk
Pan modifications permitted for clearance purposes of fuel cell accepted. Material to be
used if there are floor/truck pan modification is limited to same type material and same or
greater thickness as original floor/trunk pan.
Hood/Scoop (LATE MODEL EFI Classes): Cowl induction hoods accepted may be no
higher than 5 inches. Hood scoops prohibited. The entire induction system must be
completely covered by hood or scoop, which must be part of the vehicle hood.
Windshield/Windows: Must be OEM safety glass
Grille: A full-production grille is required for the body style used. Covering in front of or
behind the grille prohibited.
7.13 WHEEL WELLS
INNER Wheelwells: Stock wheel tubs required.
OUTER FENDERS: Leading and trailing edges of fenders may be trimmed for tire
clearance, maximum 2”.
7.14 RAM AIR
RAM AIR: Permitted.
Doors: OEM doors required.
BATTERY: Battery may be relocated. Charging system required.
IGNITION: Any battery powered ignition system permitted.
STARTER: All entries must be self-starting with on-board starter.
9: SUPPORT GROUPS
Bracket racing aids such as optical sensors, delay boxes, stutter boxes, and throttle stops
prohibited. The application or use of any device, mechanical or electronic, that permits
the driver to ascertain the position of their vehicle in relation to the starting line is
9.2 ONBOAED DIAGNOSTICS/DATA RECORDERS
ONBOARD DIAGNOSTICS/DATA RECORDERS: Onboard diagnostics and data
recorders used to monitor and record parameters such as a driveshaft speed, acceleration,
nitrous timing, chassis strain, suspension travel etc., accepted. Wide band oxygen sensors
permitted. “Playback” tachometers permitted. Laptops permitted in vehicle.
9.8 TOW VEHICLES
TOW VEHICLES: Vehicles may not be towed in or to staging lanes. Vehicles may not
be towed from the return road.
CREDENTIALS: See general regulations.
11: CLASS & SAFETY REQUIREMENTS
It is the participant’s responsibility to familiarize oneself with the class requirements as
found in the 2011 NMCA rulebook and the safety requirements as found in the 2011
The participant agrees that the participant bears the ultimate responsibility at all times to
ensure the safety of participant’s vehicle and to ensure that participant complies with all
applicable NHRA & NMCA rules. The participant agrees that participant is in the best
position to know about the construction and operation of participant’s vehicle,
equipment, and clothing, and whether there has been compliance with all applicable
NHRA & NMCA rules.
12: STREET LEGAL REQUIREMENTS
Headlights and tail lights for year & make of body used mandatory.
WEIGHT: Weight is not a tech item however excessive lightening as determined by the
tech officials will not be permitted.
CMP Drag Racing
best ET: 12.410 -- best MPH: 107.61
NMRA MM7270 -- NMCA EFI/? ????
Thank you to the CMP Drag Racing team: Tony, Doug, Maryann, Dale, Paul and Chris.