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Loren Stump

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About Loren Stump

  • Birthday 12/02/1956

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  • Name
    Loren Stump
  • Car
    1988 Lotus Esprit Turbo
  • Location

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  1. These numbers vary greatly from application to application/vehicle to vehicle and are from various sources. Tensioner: ~0 kW Actually some resistance (negligible) AC: 4 bhp Many numbers much higher (especially on demand) Alternator: 5-6kW (7-10bhp) 1.9 torque 10 bhp full load Water Pump: 10kW (13hp) Davies Craig number. 6.2 to 6.4 torque 1.1 bhp at 2000rpm, 8.6 bhp at 4000. Power Steering: 2-4kW 6.8 to 8.3 in torque 2 to 4 bhp Vacuum pump: 3-5kW 5.8 to 6.5 in torque 3 to 5.2 bhp. Resulting in a loss of between 16 and 27bhp and of course weight is another consideration. The following numbers are after subtracting the replacement part weight. Water pump at 6lbs (2.72kg) Vacuum pump at 5lbs (2.17kg) Tensioners at 2lbs (.9kg) Brackets and bolts 3.5lbs (1.59kg) Pulley and belts at 2lbs (.9kg) Air conditioning at 51lbs (23.18kg) Total of 66.5lbs (28.91kg) 1hp per 10lbs.or 6.65bhp gain or the feel of it.
  2. This isn’t exactly the switch I used but similar. Installed this system a few years ago. I removed not only the vacuum pump but also the water pump. I replaced it with Davies Craig electric pump.
  3. Here's a picture of my layout.
  4. I mounted mine next to the front bulkhead fusebox, its actuated by a small adjustable vacuum switch. Runs to a vacuum reservoir. Only needs to activate momentarily to keep the tank pressurized. Works a treat.
  5. Loren Stump

    Loren Stump

  6. Mine was fine at .004 with coated JE asymmetricals and iron liners.
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