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U.S. Street Nationals Presented by M&M Transmissions

M&M TRANSMISSIONS OUTLAW PRO MODIFIED PRESENTED BY FUELTECH & PJS RACING

Rules Updated as of December 13, 2023. BMP staff reserves the right to adjust rules for parity at any time.

payouts:

$32,000 to Win
$10,000 to Runner-Up
$2,500 to Semi-Finalists
$750 Entry Fee (Car & Driver Only) (Tech cards are non refundable)

Class Designation
Car number must be on all four sides of the vehicle, class designation of OPM or PM needs to be on driver side and windshield as well.
Race Procedures
Pro Modified is run on a .400 professional tree. Entries are qualified by quickest to slowest elapsed time, field is set with a Professional Pairing Ladder, directly out of the Compulink Timing System. 32 Car Qualified Field.
NO DUAL POWER ADDERS PERMITTED ON ANY 8 Cylinder Combinations!
WEIGHTS
Nitrous Oxide
  • 999 Cubic Inch Maximum – 2,400 lbs.
  • 900-910 Cubic Inch Maximum – 2,350 lbs.
  • Less than 900 Cubic Inch – 2,300 lbs.
Centrifugal Supercharger
  • BB Centrifugal Supercharger (No Lock-Up) – 2,600 lbs.
  • BB Centrifugal Supercharger (With Lock-Up) – 2,650 lbs.
  • SB Centrifugal Supercharger (With Lock-Up) – 2,450 lbs.
  • Diesel Centrifugal Supercharger – 2,525 lbs.

The maximum specification for the compressor wheel tip to tip is limited to 140.99mm inducer diameter. Measurement will be taken at the point where the leading edge of the compressor wheel meets the inlet housing. All air entering the Supercharger must pass through a single inlet opening. Exducer backing plate and blade tip to tip dimensions may not exceed 188.99

(No Centrifugal entry with any gear drive or blower that is not readily available for immediate sale & delivery at least 21 days before race)

(No test or prototype of any kind allowed)

Roots Supercharger
  • SB Roots Supercharger – 2,325 lbs.
  • BB Roots Supercharger (24% Max Overdrive) (No Lock-Up, OEM 2/3 Speed Transmission) – 2,450 lbs.
  • BB Roots Supercharger (24% Max Overdrive) (No Lock-Up) – 2,500 lbs.
  • BB Roots Supercharger (24% Max Overdrive) (With Lock-Up) – 2,550 lbs.
Screw Supercharger
  • SB Screw Supercharger (Maximum 82% Overdrive) (No Lock-Up) – 2,600 lbs.
  • SB Screw Supercharger (Maximum 82% Overdrive) (With Lock-Up) – 2,650 lbs.
  • BB Screw Supercharger (C-Rotor) (Maximum 92% Overdrive) (No Lock-Up) – 2,650 lbs.
  • BB Screw Supercharger (C-Rotor) (Maximum 92% Overdrive) (With Lock-Up) – 2,700 lbs.
Turbocharger
  • SB Single Turbocharger (118mm, lock-up permitted) – 2,200 lbs.
  • BB Single Turbocharger (118mm, lock-up permitted) – 2,300 lbs.
  • SB Single Turbocharger (131mm, lock-up permitted) – 2,250 lbs.
  • BB Single Turbocharger (131mm, lock-up permitted) – 2,350 lbs.
  • SB Twin Turbocharger (88mm, lock-up permitted) – 2,325 lbs.
  • BB Twin Turbocharger (88mm, no lock-up) – 2,500 lbs.
  • BB Twin Turbocharger (88mm, with lock-up) – 2,550 lbs.
  • BB Twin Turbocharger (98mm, no lock-up) – 2,600 lbs.
  • BB Twin Turbocharger (98mm, with lock-up) – 2,650 lbs.
  • Diesel Twin Turbocharger (88mm) – 2,500 lbs.
  • 4-Cylinder (Any Turbo Size) – 1,975 lbs.
  • 6-Cylinder (Any Turbo Size) – 2,025 lbs.
Weight Additions/Reductions

NO Dual Power Adders on 8 Cylinders

  • Stepped compressor wheel add 75lbs (extended tip)
  • Turbocharged entry with 4.9 Borespace Hemi add 25lbs
Nitrous Combinations
  • Add 25 lbs. for Transmission with Four (4) or More Forward Gears, automatic transmission only. Addition does not apply to clutch combination.
Boosted Combinations
  • Add 25 lbs. for Non-Lockup Transmission with Fluid Manipulation
  • Add 25 lbs. for Transmission with four (4) or more forward gears.
  • Add 50 lbs. for Billet Centrifugal Supercharger.
  • Deduct 50 lbs. for 136mm Centrifugal Supercharger.
  • Deduct 25 lbs. for Nostalgia Body Style
  • Weight additions do not apply to any Diesel combinations.
  • 140.99 centrifugal max
NOSTALGIA BODY STYLE

The following body styles may deduct 25 pounds from their minimum weight: 1937-1938 Chevy, 1937-1942 Willys, 1949-1950 Mercury, 1953- 1959 Studebaker, 1953-1962 Corvette, 1955-1957 Chevrolet, 1955-1957 Buick, 1968-1972 Chevelle. Full size truck bodies (Silverado, F-Series, Ram, etc.) are also eligible for the body deduction.

FUEL

Racing gasoline and methanol permitted. The use of nitro methane, nitroparaphins and/or propylene oxide is strictly prohibited. Diesel combinations must use VP Torq DX for fuel.

Thank You to Our Sponsors
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