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SCCA Enterprises logo Hagerman RacEngineering
is the Northeast/Mid-Atlantic SCCA Customer Service Representative
for Spec Racer Ford, Formula Enterprises, and Enterprises Sports Racer
SCCA Club Racing
Monday, July 24, 2017

Spec Racer Ford (SRF)

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Sports Racer - front/side view
Sports Racer - rear/side view

The Spec Racer Ford is a one-design, fixed-specification race car; thus the name “Spec Racer”. Critical chassis parts must be only those produced by the vehicle kit manufacturer, SCCA Enterprises. The engines, transmissions, and shock absorbers are sealed by SCCA Enterprises to ensure that each of these components is the same for all competitors. Engine assembly and rebuild can only be performed by SCCA Enterprises, who ensure that every engine leaving their shop is within a 2-horsepower window. With each car in the race being virtually identical, the emphasis is placed on driver skill and not on the latest trick components. Close racing is guaranteed, since no one competitor has a large performance advantage. The cost of racing is also dramatically reduced, since standard parts can be mass-produced and do not change over time.

This philosophy of stable design and equal competition has resulted in the Spec Racer Ford becoming one of the most popular categories of racing in the SCCA, with as many as 2,000 racers participating nationwide each year. Over 900 cars have been delivered over the past 30 years, with new units continuing to expand the class each year.

The Spec Racer is an enclosed-wheel, open-cockpit, mid-engine, purpose-built race car. The chassis is a steel tube frame with fully-independent suspension, and with the driver centered in the cockpit. The body is a three-piece fiberglass design having tightly-controlled dimensions. Tires must be Hoosier SRF-branded racing tires, with one model for dry track conditions and one model for rain races.

When the car debuted in the 1980s as the “Sports Renault”, it was powered by a 1.7 liter Renault engine. Starting in 1993, the car officially became a Spec Racer Ford (SRF) with the introduction of a 1.9 liter single-overhead cam Ford four cylinder. The third and latest generation of engines was introduced in 2015, with a Ford twin-cam four-valve 1.6 liter “Sigma”; the new car is called a Spec Racer Ford GEN3 (SRF3). This new engine provides approximately a 24 HP boost over the 1.9 liter, as well as an overall car weight reduction of 110 pounds. The SRF3 and SRF currently run as two separate National classes until the end of 2017, when the SRF will be designated as a Regional class only.

SRF Engine Bay
ENGINE bay
SRF Bare Frame
BARE FRAME
SRF Front Chassis Detail
FRONT CHASSIS DETAIL
SRF Rear Chassis - Detail
REAR CHASSIS DETAIL

The suspension uses rocker-arm-actuated springs and shocks, with adjustable front and rear swaybars. The four shock absorbers are sealed, rebound-adjustable Penske gas monotube units. Camber, caster, toe, ride height, and corner weights are fully adjustable. Steering is rack and pinion.

Data acquisition and cockpit instruments are fundamentally unrestricted, as long as they have no part in controlling vehicle systems. On the SRF3, competitors can download engine data directly from the Engine Control Unit, enabling review of several parameters including RPM, water and oil temperatures, and throttle position.

SRF3 Specifications:

  • Engine: Ford 1.6 Liter fuel-injected DOHC 16-valve 4-cylinder, water cooled, sealed
  • Transmission: Ford 5-speed synchronized transaxle, sealed
  • Exhaust: 4-into-1 steel tubular header
Maximum Shift RPM: 6750 (Rev limiter)
  • Horsepower: 132
  • Weight: 1560 lbs. (with driver)
SRF Specifications:
  • Chassis: Tubular steel welded frame
  • Engine: Ford 1.9 Liter fuel-injected SOHC 8-valve Hemi-head 4-cylinder, water cooled, sealed
  • Transmission: Ford 5-speed synchronized transaxle, sealed
  • Exhaust: 4-into-2-into-1 steel tubular header
  • Engine Management: Ford Electronic EEC IV
Maximum Shift RPM: 6000
  • Horsepower: 108
  • Weight: 1670 lbs. (with driver)

SRF3 and SRF Common Specifications:
  • Suspension: Independent front and rear, inboard shocks actuated by rocker arms
  • Shock absorbers: Rebound adjustable, Penske gas monotube
  • Wheelbase: 92"
  • Track: Front: 57.5” Rear: 57.75”
  • Fuel: Unleaded 93 Octane or greater “pump gas”
  • Fuel capacity: Approximately 7 gallons contained in a racing fuel cell
  • Brakes: 4-wheel disc, vented rotors, single-piston calipers, cockpit adjustable bias
  • Body: Three piece fiberglass
  • Approximate Top Speed: 155 mph SRF3, 135 mph SRF
  • Wheels: Front: 13x5.5” Rear: 13x7”
  • Tires: Hoosier SRF radial: Front – 185 x 13"; Rear – 205 x 13", slick tread for dry tracks and grooved tires for rain