Class Rules

MARYLAND PERFORMANCE CENTER REAL STREET 2023 RULES

IN MPC REAL STREET, ALL COMBOS ARE WRITTEN AND MAXIMIZED FOR PARITY BASED UPON DATA GATHERED, TESTED AND SHARE IN A MAX EFFORT FASHION. THROUGHOUT THE SEASON, SHOULD ANY COMBOS RESULTS AT THE TRACK PROVE TO HAVE A CONSISTANT DOMINANT ADVANTAGE , RULES MAY BE ADJUSTED AT ANYTIME.

Engine / Base Weights

N/A Small Block - 2550 lbs
- Any Inline Cast Cylinder head, single four cast Intake with single carb / TB
- Single four sheet metal / billet intake - Add 25 lbs.
- Dual four / tunnel ram intakes - Add 50 lbs.
- Canted valve heads - Add 50 lbs.
- All Blocks and Heads must retain factory bore spacing
- Use of Hood Scoop Permitted

N/A Big Block Convetional Head - 2900 lbs
- Max Deck Height 10.200" BBC , 10.300" BBF
- Conventional layout/valve angle Heads ONLY for these entries / weights
- Production Cast single carb intake manifolds ONLY, sheet metal / billet manifolds prohibited
- All Blocks and Heads must retain factory bore spacing
- Dry Sump Oiling Systems Permitted

- Use Of Hood Scoop Permitted

N/A Big Block Chevy NON-STANDARD Valve Angle Heads i.e. – BIG CHIEF STANDARD LAYOUT HEAD, 20*, etc...
- All Deck Heights with Maximum 10.200” Deck Height - 2975 lbs.
- Brodix SR-20 - Deduct 25lbs
- SYMETRICAL PORT HEADS PROHIBITED
- Production Cast single four intake manifolds ONLY, sheet metal/tunnel ram manifolds Prohibited
- All Blocks and Heads must retain factory bore spacing
- Dry Sump Oiling Systems Permitted

- Use of Hood Scoop Permitted

N/A Big Block BOP Entries - 2750lbs
- Factory bore space blocks and heads ONLY
- Dry Sump permitted
- Billet / Sheet Metal Single 4 Intakes permitted

- Use Of Hood Scoop Permitted

Nitrous Small Block - -

- Inline Stock Valve Angle, Factory Port Height, Non Raised Runner/NON Hi-Port Heads – 3000 lbs
- Inline 20* Hi-Port SBF and Raised Runner 23* SBC and LS Cathedral Port Heads - 3150 lbs
- All 18, 15 and 13 Degree Inline Valve Heads – 3200 lbs
- All Inline Heads 12 Degree or Less, Brodix Neal, BD2000, Yates C3, All Frankenstein Square Port Heads - 3275lbs
- ALL other Heads must have approval from MPC (IF ITS NOT LISTED ABOVE ITS NOT LEGAL)

- FORD Coyote Nitrous Combos - 2850lbs, Limited to 40 Jet Fogger / 120 Jet Single Entry Plate (+50 for Billet Intake)

- 8.2 deck SBF Nitrous - Deduct 125 lbs.
- Aftermarket LS1,2 &3 SVA and Stock Port location heads fall under SVA weight and Jet rules
- Single stage nitrous systems ONLY
- Plate systems restricted to jet style plates ONLY, nitrous puck systems PROHIBITED
- Commercially available plates only, no custom plates
- If running cross bar plate and only using one set of bars, second set of spray bars must be capped off and will be strictly enforced.
- Fogger systems permitted
- Fogger jets must be accessible for jet checking
- EFI Dry Fogger nitrous systems may only run one nitrous jet per cylinder, split jetting prohibited
- 1 Fuel solenoid, 1 Nitrous solenoid and 1 purge solenoid only for all plate systems.
- Fogger systems permitted one dedicated nitrous and fuel solenoid per side of engine.
- Nitrous purge line must exit engine bay to outside of vehicle and hood area
- EFI Dry Nitrous Applications- Limited to one bar on single entry plates and 2 bars on cross bar plate. All other bars and solenoids must be capped off.
- One 10lb. or 15lb. bottle permitted only
- Digital Progressives permitted
- Sheet metal intake manifolds permitted
- Nitrous pusher systems prohibited
- Cold nitrous systems prohibited
- Water/Meth or Water injection prohibited

---NEW FOR 2023 THERE WILL BE 2 DIFFERENT WEIGHT / JET COMBINATIONS. THE STANDARD BASE WEIGHTS LISTED ABOVE OR RACERS MAY NOW DEDUCT 250LBS AND TAKE THE WEIGHT BREAK JET RESTRICTIONS LISTED BELOW. THESE JET RESTRICTIONS ARE 100 HP LESS THAN STANDARD JET RESTRICTIONS AND BY ALL CALCULATIONS ON WEIGHT VS HP SHOULD EQUAL SAME ET'S. WE WILL MONITOR THIS NEW COMBINATION CLOSELY IN ORDER TO ADJUST WEIGHT ACCORDING TO NEW JETTING TO KEEP PARODY IN THE CLASS---

---STANDARD BASE WEIGHT NITROUS JET RESTRICTIONS---

SINGLE SPRAY BAR PLATES
Stock Valve Angle, factory port height, NON Raised Runner/NON Hi-Port heads – 126 Jet
All other heads listed – 120 Jet

CROSS-BAR PLATES
Stock Valve Angle, factory port height, NON Raised Runner/NON Hi-Port heads – 92 Jet
All other heads listed – 82 Jet
FOGGER SYSTEMS
Stock Valve Angle, factory port height, NON Raised Runner/NON Hi-Port heads – 42 Jet
All other heads listed – 40 Jet

---NEW -250LBS WEIGHT BREAK COMBO JET RESTRICTIONS---

SINGLE SPRAY BAR PLATES
Stock Valve Angle, factory port height, NON Raised Runner/NON Hi-Port heads – 106 Jet
All other heads listed – 102 Jet

CROSS-BAR PLATES
Stock Valve Angle, factory port height, NON Raised Runner/NON Hi-Port heads – 78Jet
All other heads listed – 67 Jet

FOGGER SYSTEMS
Stock Valve Angle, factory port height, NON Raised Runner/NON Hi-Port heads – 36 Jet
All other heads listed – 34 Jet

***All Jets will be pinned and sealed with MPC heat shrink jet seals. Should a competitor need to remove the seal for jet change or service, new jets will be re-verified, pinned and resealed prior to competition***

Boosted Small Block
Turbocharger Rules and Base Weights
- Maximum Single T76mm Turbo -
- T6 - 76mm Cast Wheel - 32000 lbs – MAXIMUM Compressor wheel limited to 76mm Ind x 116mm Exd - Turbine wheel limited to max 96.2mm Ind x 88.3mm Exd

- T6 - 76mm Billet Wheel Limited 235 Class Legal Turbo - 3175 lbs - MAXIMUM Compressor Wheel limited to 76mm Ind x 105mm Exd - Turbine Wheel limited to 96mm Ind x 88mm Exd

- T4 – 76mm Cast Wheel - 3150 lbs – MAXIMUM Compressor wheel limited to 76mm Ind x 116 Exd - Turbine wheel limited to 96.9mm Ind X 88.9mm Exd
- T4 - 76mm Billet Wheel - 3075 lbs – MAXIMUM Compressor wheel limited to 76.71mm Ind x 102.36 mm Exd - Turbine wheel limited to 89.54mm x 84.70mm Exd
- V-band turbine housings PROHIBITED, 4-bolt T-4 and T-6 Flanges ONLY
- All Turbochargers limited to mid frame GT47-76, S400 type chassis
- FORD COYOTE turbo combos must still adhere to T-4 turbo specs listed above ONLY

Supercharger Rules and Base Weights
- Maximum Procharger F1-A-91, Vortech V7 - YSI (Cast Wheel) - 3300 lbs
- Whipple 3.8L, 4.0L & 4.5L LS Based Supercharger - 3375 lbs OVERDRIVE RATIO TBD
- Whipple 3.0L Coyote Based Supercharger – 3500 lbs MAX Overdrive Ratio 50%
- Whipple 3.8L COYOTE Superchargers PROHIBITED
- Magnuson TVS2650 Supercharger – 3375lbs OVERDRIVE RATIO TBD
- Procharger D1-X – 3250 lbs
- Procharger P-1X – 3225 lbs
- Vortech V7 JT-trim - 3200 lbs

- Radius Bells PROHIBITED ON ALL SUPERCHARGERS

- Belt Driven Superchargers - Deduct 50 lbs
- Non frontal air combos – Deduct 25 lbs
- Billet Roots Blowers PROHIBITED
- Vortech Billet Wheel YSI PROHIBITED
- Vortech Billet wheel JT Trim PROHIBITED
- Gear Drives Permitted

Intercooler Types Permitted For All Boosted Combos
- Air to Air Intercoolers - NO ADJUSTMENT
- Air to Water intercoolers - ADD 75 lbs
- Non Intercooled Combos – Deduct 150 lbs
- Methanol Injection permitted on non-intercooled combos only, MAXIMUM 2 nozzles – Deduct 100 lbs From Base Weight
- The use of nitrous or CO2 for intercooler and or intake charge tube cooling purposes is strictly PROHIBITED

Boosted Cylinder Head and Intake Rules
- Inline Stock valve angle production heads only
- Non SVA and Canted valve heads PROHIBITED
- SBF 20* Hi-port and SBC 23* Raised Runner Heads - ADD 25 lbs

- Any Aftermarket LS Cylinder Head and heads less than SVA up to 5 Degrees MAX (LS 10*, GM 18* and SBF 15*) and all GM Factory LS7 heads - ADD 25 lbs
- Ford Modular 2 and 3 valve combos - Deduct 150 lbs
- Ford Modular DOHC 4 valve - Deduct 75 lbs
- 8.2 Deck SBF combos - Deduct 25 lbs
- NACA Duct or any other directed air intake to turbo or blower head unit will be considered Frontal Air

4 and 6 Cylinder Combos
- Inline 6 Cylinder boosted Base weight – 3200lbs
- Inline 4 Cylinder boosted Base Weight – 2900lbs
- V6 Turbo Combos – Deduct 50lbs from V8 Base weights
- Nitrous PROHIBITED on 4 and 6 cylinder boosted combos
- Billet Blocks permitted for Inline engines only – ADD 100 lbs
- Billet Heads PROHIBITED

Other Engine / Induction Rules
- Conventional head valve angles – (* = degree)
SBC – 23*
LS – 15*
BBC – 24*
SBF – 20*
BBF – 15*
SB Chrysler – 18*
BB Chrysler – 15*
Small Block Oldsmobile - 18*
- Boosted Big Blocks and Nitrous Big Blocks PROHIBITED
- Single Power Adder ONLY, Nitrous used for intercooler cooling purposes or Spooling Turbos prohibited
- Any Engine cooling system permitted, radiators not required
- Radius Bells and Race Covers on superchargers and turbos PROHIBITED
- BILLET HEADS PROHIBITED ON ALL ENGINE COMBOS
- BILLET BLOCKS PROHIBITED ON ALL ENGINE COMBOS WITH THE EXCEPTION OF INLINE 4&6 CYLINDER COMBOS

- Any NA small block, NA Big Block or Nitrous SB entry permitted to have carb or throttle body stick through opening in hood if desired for clearance. Hood scoops PROHIBITED with the exception of NA small block.

Transmissions
Any OEM style or Aftermarket Automatic Transmissions are permitted. Maximum 3 forward gears. Lock-up style Transmissions and Lock-up converters PROHIBITTED. The use of converter dumps, trans-brakes, and electric/air operated or pneumatic shifters are all permitted.

Suspension
- Stock Style Rear Suspension
- Ladder Bar suspension permitted
- 4-link suspension PROHIBITED unless factory equipped
- Shock relocation permitted
- Mini-tubbing permitted, full tubbed and back halved cars prohibited
- Cars must retain factory frame rails from firewall back in factory locations, notched rear frame rails permitted for tire clearance. Shock tower cars must retain factory frame rails from firewall forward to front of shock tower.
- Front Frame rails may be modified forward of shock towers to accommodate tubular core supports and radiator/fuel cell mounting, shock tower cars must retain factory location upper pick up point and k-member pick up points. Notching of shock towers permitted. Late Model F-Body Caster/Camber Plate Spindle Mount Conversion Permitted.
- Aftermarket Vehicle Specific BOLT IN front K-member and front suspension permitted
- Smith Racecraft, Heidts, CA Chassis Works or any variation bolt in sub frame front ends permitted with prior approval from MPC
- Wheelie bars prohibited

Fuels Permitted
- Pump Gas, E85, Race Gas ONLY
- Methanol and Nitro PROHIBITED

Tires Permitted *NO EXCEPTIONS*
- Any 275 Radial allowed or M/T 3355R Pro Bracket Radial
- M/T 3559 275 Radial R-tire or 28 x 10.5 NON “W” slick – Deduct 50 lbs
- M/T 3052R 26x8.5 – Deduct 75 lbs
- M/T 3453 ET Street Radial – Deduct 75 lbs
- 29.5 x 10.5 NON “W” SLICK (non-radial) Limited to NA combos only

Exterior
- Stock appearing
- All cars must have OEM style body panels
- The Only fiberglass / carbon fiber permitted is the hood, doors, front fenders, bumpers and all rear hatch/deck lid/trunk lids. All entries must retain factory exact roof and rear quarter panels
- Cowl hoods Permitted on all entries
- Forward facing hood scoops Permitted on Naturally Aspirated Combos Only
- Optic Armor / Pro-Glass permitted. Factory appearance must be upheld, no visible mounting screws or rivets may be seen on front or rear windows and factory window trim must be re installed and properly in place
- Must have working tail lights
- Maximum 17” rear trunk mounted wing measured off back of trunk
- Parachutes Permitted and required for ET of Vehicle
- Radius inlet molded bumper covers for boosted applications Permitted – ADD 25lbs

Interior
- Must be factory appearing
- Must retain factory appearing dash, carbon or fiber glass dash OK, aluminum / sheet metal dashes PROHIBITED
- Must have carpet

Other rules

- Mufflers required on all entries with the exception of Turbocharged combos.

- Pre 1980 Vehicles with the exception of FoxBody Mustangs / Capri will get a Nostalgia Weight Break - Deduct 50lbs.
- Fender exit exhaust permitted, Must exit out front fender or bumper cover, Zoomies and Bull horns PROHIBITED. Up Pipe exit Permitted on inline engine combos ONLY but must be cut flush with hood.
- Front ends and front overhang not to exceed 45 inches forward of center line of front spindles. If front overhang of selected body is less than the maximum of 45 inches, an extension may be added to reach the maximum length
- Supercharger Compressor housings and Turbocharger Compressor and Turbine housings must be removed for tech inspection and will be sealed after. If seal is found broken during tech, the supercharger or turbo must be re-inspected before competition.
- Every car and driver will be required to go across scale after every qualifying and elimination round. If elimination round winner is found in violation of rules after round win, they will be disqualified and loser will advance to next round as long as they are not in violation as well. If both cars are in violation, both cars will be disqualified from race.
- Class will be run 1/8th mile heads up .400 pro tree
- Must have current license, chassis certification and safety equipment for vehicles E.T.
- Must adhere to all general track rules. In Addition, in reference to a double red light fault during eliminations, the first is worst rule will be implemented so the first red light will be automatic loser.
- Minimum ET for Class is 7.50 second 1/8th mile

- Driver may use substitute/back up car for points championship but MUST retain same car number as primary car and must meet all above rules and regulations.

- The Entered Driver who enters the car into Q1 must finish the entire event. Driver swapping or fill in PROHIBITED.

- Once car has been teched in for event, you must run the car/combo in that exact setup for entire event (Only Exception is Tire Rule)