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Radical East USA Proposes New Spec Racing Series with Historic Sportscar Racing

Radical HSR Challenge Cup East Series

  • Looking to build on the increasing worldwide popularity of Radicals unique single marquee racing concept, Radical East USA proposes a new Spec series with emphasis on cost effective competitive racing for gentleman drivers utilizing the New Radical SR3 RS. The RS is built to be a forgiving, fun to drive sports racer with the driver piloting an open cockpit Lemans prototype style race car.  The Driver sits surrounded by a carbon steel space frame chassis forming an integral safety cell featuring an aluminum honeycomb front crash structure complying with FIA Production Sports Car Crash Test.  Power comes from the reliable 1340cc double overhead cam 4 cylinder Powertec Suzuki K8 “Busa” dry sump engine with extended refresh schedule and sealed ECU, delivering 210bhp / 130 ft lbs through a 6 speed manual sequential transmission and a Quaiffe limited slip gear drive system. The two seater cockpit, ideal for driver training. Four pot Radical calipers with vented discs on each corner endear the SR3 RS with awesome stopping power. The uncanny grip is provided by the high down force Aero Pak working with Bespoke Dunlop slick tires. Weight is 1320#.
  • A true Spec series run in conjunction with HSR in which the driver is the lone determining factor, so no additional car modifications are permitted.
  • Initial plans call for 2011 preliminary races sanctioned by HSR (proposed) on select weekends. Racers will compete for both Sprint & Endurance racing formats.
  • Control Tires and series scrutineer to minimize cost and ensure equal competition
  • 2 races plus practice & qualifying per weekend. Additional points for fastest lap & pole position
  • Driver training programs and top quality hospitality for entrants guests and sponsors
  • Races to be run on legendary tracks such as Daytona, Sebring, Road America, Watkins Glen, Road Atlanta and other premier venues.
  • All series cars are exclusively supplied & prepared by Radical East USA and/or Radical Motorsports New Jersey. Arrive & drive programs will be offered featuring full driver support, vehicle transportation & hospitality.
  • Special Launch promotion discount to first (12) HSR founding series participants. Receive $12,000.00 factory rebate on Spec series vehicle.


Radical SR3 RS HSR Challenge Cup East Series Spec Racer

  • Powertec 1,340cc Dry sump, fuel injected motor, 210bhp, 130 ft lbs torque, 10,500 RPM, LHD
  • 6 speed manual sequential transmission
  • Sealed Life Data engine ECU with histogram, exclusive HSR Cup series chassis number plate
  • Quaiffe lmt slip Diff ; 3:07:1 final ratio
  • Quaiffe Endurance Limited Slip Gear Drive unit w/ oil pump, cooler & changeable ratios
  • 260mm diameter - 40 vane vented disc brakes with Radical four pot calipers
  • Stainless steel manifold and race silencer
  • Carbon composite front brake & wheel Bearing cooling shrouds
  • Five piece, ultra lightweight fibre colored glass bodywork  
  • Brake /fog lights, triple rear indicator lights & LED roll bar mounted visibility safety lights
  • High-downforce aerodynamic package, front diffuser, sculptured side pods, large rear diffuser, wheel arch louvers and bi-plane rear wing with end plates.
  • Two-seater space-frame chassis with integral SCCA-approved safety cage, FIA crash box, and towing eyes F/R
  • Dual Hi sided  race seat with vinyl seat pads & fully adjustable pedal box
  • Hans Compatible driver & pass harness
  • Composite drivers head restraint
  • Quick-release steering wheel with collapsible steering column
  • ‘Nik’ fully-floating suspension system front & rear
  • Single adjustable bespoke titanium mono tube dampers
  • Lightweight Centerlock rims - 8x15” Front  / 10.5x16” Rear with Bespoke Dunlop slick tires
  • Dashboard adjustable brake bias , Electrical cut-off  switch
  • Forward facing roll bar stays  with SFI shock absorbing foam padding (USA spec)  
  • Large Digital gear indicator
  • 14 gal aluminium foam filled fuel tank mounted behind driver within the safety cell
  • Carbon-composite wrap-around dash, Radical LCD instruments & vital engine display. Optional: Data Acquisition
  • Manually-activated fire extinguisher system
  • Engine hour meter
  • Including: Air Freight Heathrow – USA , Import Duties

List Price:  $105,796.00 – Includes Air Freight & Import Duty

Special Launch Promotion: First (12) HSR Founding Series Participants, Receive $12,000 Factory Rebate**


** Launch Rebate offer expires 11/15/10

For More information, contact Barry Smith at Radical East USA:
516 526 5614 - barry@radicaleastusa.com

For information on Historic Sports Car Racing (HSR) visit:


Download the HSR Radical Challenge Cup East Series PDF Brochure!


Radical East USA, 17133 Beeline Hwy Jupiter, Fl. 33048

Radical Motorsports NJ, 815 Rte 17 South Ramsey, NJ 07446
mackeymotorsport@aol.com  201-934-8888