![]() The original 4.3L is constructed of cast iron block and head. The engine has a peak horsepower of 285 at 5300 RPM and peak torque of 305 lb-ft at 3900 RPM. The newly introduced 4.3L Vortec, also 262 cubic inches, has a different layout with a bore of 3.92 inches and a stroke of 3.6 inches.Torque is a rotational force generated by the electrical system, whereas, the horsepower is an imperial unit of power equal to 745.7 watts. Torque - Horsepower (hp) conversion is a method of converting one unit from other and vice versa.Dropped to 3.5" below pad, holeshot cavitation went away but still feel cavitation at 30-40 mph (very little now). Propshaft was at 1.25" below pad, terrible holeshot cavitation and 30-40 mph cavitation was noticeable. Where "Hp" stands for horsepower, "Q" stands for flow rate in gallons per minute, "H" stands for total head in feet, the 3,960 is a conversion factor to transfer from gallons per minute per foot to horsepower and "eff" stands for the efficiency of the hydraulic equipment being used, such as a pump or turbine. ![]()
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