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For sale by offer:

1971 Pontiac LeMans Sport Convertible (four speed manual) encluding:

  • 407 cui V-TEC - V8 engine (equipped with US Pat. 7,171,930)

  • Original patent certificate US Pat. 7,171,930

  • Original engine (matching numbers)

  • 8 sets of Vari-lift rocker systems compatible with Edelbrock cylinder heads for Pontiac

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Brief description of the car

 

​​​​1971 Pontiac LeMans Sport Convertible 4-speed manual equipped with a 407 cui Pontiac V-TEC engine with variable valve lift and valve duration based on US Patent 7,171,930

This vehicle is the only vehicle in the world ever to be equipped with this variable valve train system. The convertible, which is already very rare in itself, was purchased by the inventor itself in the year 2008 for testing of his invention. After a loving two-and-a-half-year frame-off restoration this beautiful car was equipped with this unique 7200 rpm Pontiac V-TEC enginge for testing on the road. The vehicle was driven with the unnoticed valve control until 2016. It was only discovered during the fourth periodic inspection by the Road Traffic Authority in fall 2016. As a result, the vehicle's operating license was revoked.
After the original engine was reinstalled, the vehicle was put back on the road in mid-2017 and even received veteran status. Now this unique vehicle, which is still owned by its inventor, is being offered for sale. The buyer is free to choose which engine should be installed in the vehicle.

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Odometer at installation of V-TEC engine 2010: 40,700 km
Odometer at installation of original 407 cui engine 2017: 90,000 km
Odometer now 2026: 121000 km  â€‹â€‹â€‹

 

click picture to enlarge...​​

​​​​Brief description of the 407 cui V-TEC engine (built-in or supplied)

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  • Mileage (2010 - 2016): 50000 km

  • Enginge Block: Pontiac 400 cui ​​​​Casting # xxxxxx

  • Bore: 4.155 inch

  • Stroke: 3.75 inch

  • Displacement: 407 cui

  • Compression ratio: 10.5

  • Rods: Crower Titanium full floating pin, 6.625 center to center

  • Piston: Ross flat tapet

  • Crank: Crower billet SAE 4340 tangential cross drilled

  • Main Cap: Custom made 4-Bolt caps

  • Heads: Edelbrock 72ccm with beehive springs and titanium retainer

  • Balancer: Fluidamper

  • Timing device: Pete Jackson gear drive

  • Flywheel: Hays

  • Clutch: Mc Leod

  • Camshaft: Comp Cam solid roller cam 288° / 288°

  • Lifter: Comp Cam solid roller lifter with rev. kit

  • Rocker ratio and valve duration (seat to seat):

        idle up to 3500 rpm:  rocker ratio 1.18 / 268° duration (int. and exh.)

        above 3500 rpm:        rocker ratio 1.67 / 288° duration (int. and exh.)

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Performance data (car wight 1780kg + 90kg driver):

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50mph - 75mph (80km/h - 120 km/h)         / 2.9 sec.

62mph - 87mph (100 km/h - 140 km/h)      / 3.1 sec.​

62mph - 93mph (100 km/h - 150 km/h)      / 3.8 sec.

62mph - 100mph (100 km/h - 160 km/h)    / 4.8 sec.

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​​​​Brief description of the installed Invention (US Patent 7,171,930)

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US patent 7,171,930 describes a rocker arm for internal combustion engines that allows switching between two transmission ratios—while the engine is running, mind you—which corresponds to valve lift switching.
The two freely selectable transmission ratios are achieved by an eccentric built into the rocker arm body. A shift pin allows the eccentric to be connected or disconnected from the rocker arm body. This allows the user to choose whether the rocker arm body rotates around the outer diameter of the eccentric (low lift mode) or whether the eccentric rotates together with the rocker arm body around the eccentric bore (high lift mode).

A more detailed explanation of the variable rocker arm can be found at... 

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​​​​Brief description of the 407 cui original engine (now installed)

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  • Mileage (2017 - today): 31000 km

  • Enginge Block: original 350cui matching numbers

  • Bore: 3.905 inch

  • Stroke: 4.25 inch stroker kit Butler

  • Displacement: 407 cui

  • Compression ratio: 9.2

  • Rods: Eagle ESP forged H-Beam 6.8 inch center to center with full floating pins

  • Piston: Ross flat tapet

  • Crank: Eagle cast 4.25 stroke

  • Bearings: King Bearings 

  • Heads: 96 cc original matching numbers rebuilt (new guide / equipped with valve stem seals and beehive springs #26995)

  • Head gasket: cometic multi layer steel 0.027"

  • Camshaft: Comp Cam hydr. roller #51-413-11 (212°/218° @0.05)

  • Lifter: Comp Cam hydr. roller lifter

  • Rocker arms: Comp Cam roller tip  #CCA-1451

  • Timing chain: Comp Cam # 174

  • Flywheel: Hays

  • Clutch: Summit racing​​​​

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