How credible is BMP's claim that underdrive pulleys add +12 HP and +8 lb/ft of torque across the RPM range? BMP claims in its catelogue (ed.# 16 pg 44) that by increasing the diameter of pulleys for alternator, water pump, power steering and A/C compressor, the reduction in drive ratio transfers power from these accessories to the crankshaft. Any experience or objective test results you can offer will be appreciated. Thanks.
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