Hartley Engines

Twin-turbo Hartley H1 V8. So much want.

Hartley engines made jaws drop when they debuted the H1, a V8 engine using two Suzuki Hayabusa heads mated to a custom block. They also developed two different inline-four designs and three V8 designs. Article updated 11/17/2017.

H1 V8
Design sold in 2012 to racing team.

  • 75° V8 odd fire
  • 2.8 L (3.0 liter optional)
  • 84 mm x 63 mm (67 mm stroke optional)
  • 4 cams, 32 valves via internal silent chain
  • 400HP @ 10,000 rpm with stock street cams (higher spec. is available)
  • 245 ft-lbs torque @ 7500 rpm
  • 200 lb
  • 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
  • Unique opposite offset cylinders

Hartley H1 V8 diagram

  • Prices taken from Holeshot Racing in 2013
  • $35,985 2.8 L 400 hp Naturally Aspirated
  • $39,911 2.9 L 450 hp Naturally Aspirated
  • $39,911 3.0 L 500 hp Naturally Aspirated
  • $37,621 2.8 L 600 hp Twin-turbo
  • $44,981 2.8 L 800 hp Twin-turbo
  • $46,781 2.8 L 1000 hp Twin-turbo

2.0 L Bolt V8
Design sold in 2016 to super car company.

  • 90° V8
  • 2.0 L
  • 76 mm x 55 mm
  • 4 cams, 32 valves, Titanium intake valves
  • 13:1 compression ratio
  • 400 hp at 13,000 rpm (14k redline)
  • 160 lb-ft at 11,000 rpm
  • flat-plane crankshaft
  • Unique opposite offset cylinders

Hartley 2.0 L BOLT V8 diagram

3.0 L Bolt V8
Design sold in 2016 to JFC Racing in Auburn, Washington. You can read more details about the JFC V8 here.

  • 90° V8
  • 3.0 L
  • 84 mm x 68 mm
  • 4 cams, 32 valves
  • 13:1 compression ratio
  • 450 hp at 10,000 rpm (10.5k redline)
  • 250 lb-ft at 8,000 rpm
  • Unique opposite offset cylinders

Hartley 3.0 L BOLT V8 diagram

Maxi V8
Currently being developed to be biggest displacement and most powerful engine that uses motorcycle heads.

H2 Inline-Four
Design sold in 2012 to racing team.

  • Prices taken from Holeshot Racing in 2013
  • $23,063 1485 cc 250 hp Naturally Aspirated
  • $25,353 1558 cc 260 hp Naturally Aspirated
  • $25,353 1596 cc 270 hp Naturally Aspirated
  • $27,365 1485 cc 400 hp Turbo
  • $27,970 1485 cc 500 hp Turbo
  • $28,755 1485 cc 600 hp Turbo

Bolt 4 Inline-Four

  • Inline-four cylinder engine
  • 1175-1400 cc Turbo, 1500 cc NA
  • 81 mm bore x 57 mm (options up to 68 mm)
  • 2 cam, 16 valves
  • 300-400+ horsepower (turbo)
  • Billet steel crankshaft
  • 4340 billet H beam rods
  • 7075 T6 billet crankcase
  • Dry sump oil system with filter, air/oil separator and water pump
  • 160 lb

Hartley Bolt 4 inline-four diagram

11 thoughts on “Hartley Engines”

    1. it ws a long time ago, but V8’s in a plane…not until it was certified
      these engines were develioped near Hartford Wi by John Hartley of Hatel Enterprise…I worked for him at one time in an engineering firm.

      He’s working a 4 cylinder and a new high liter “maxi” V8….prices are pretty historic, wish I could afford one. I’ll stick with my LS7 engined Z06…

    2. Hi

      I am intresting buy Hayabusa V8 engine second hand or only Hayabusa V8 engine block new or second hand.

      Can you help me if you have or if you know how have?

      Bg. Jouni Rissanen / TeanForceMajor ry

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