UPDATE:  As of March 2012, the H1 and H2 engine technology has been sold.  The new owner will further develop the technology for race applications. 

Hartley Enterprises retains the rights to build these engines in limited numbers for select existing customers and special projects in the US.  



  • 75° odd fire V8
  • 2.8 LITER, 170 cu. in. displacement (3.0 liter optional)
  • 84mm Bore X 63mm Stroke (67 stroke optional)
  • 4 cams, 32 valves via internal silent chain
  • 530mm wide x 485mm long x 530mm high
  • 400HP @ 10,000 rpm with stock street cams (higher spec. is available)
  • 245 ft-lbs torque @ 7500 rpm
  • 200 lbs engine weight
  • Billet nitrided steel 180° crank
  • 4340 H-beam con-rods with ARP bolts
  • Billet 6061-T6 aluminum crankcase
  • Dry sump 0il system with 4 stage pump
  • 7.25" or 5.5" Twin disc clutch
  • DTA S80 full sequential ECU
  • Unique cylinder offset and cam drive arrangement yields a compact design- Patent No. 7,168,405

(Click on image to retrieve .pdf)