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indicated or gross horsepower is the theoretical capability of the engine [PLAN/ 33000]; brake/net/crankshaft horsepower (power delivered directly to and measured at the engine's crankshaft) equals indicated horsepower minus frictional losses within the engine (bearing drag, rod and crankshaft windage losses, oil film drag, etc.);
From 1968 to 1971, the 460 was rated at 365 gross hp. In 1972 SAE net horsepower, which accounted for real world power losses created by engine accessories and the exhaust system, was adopted as a standard in North America, resulting in a significant decrease in horsepower ratings of all engines. In addition, a reduction in the 460 compression ...
In that externally modified state it produced 383 hp (286 kW) SAE gross at 6,100 rpm, and 391 lb⋅ft (530 N⋅m) torque (gross) at 4,000 rpm. [17] A measurement of SAE net horsepower would be significantly lower, and represents a more realistic as-installed configuration with all engine accessories, air cleaner assembly, and automobile exhaust ...
A fairly definitive source on the 428cj horsepower is about 385 gross hp, backed up by numerous posts on FordFE.com and dyno tests in Jay Brown’s “The Great FE Intake Comparo” which features a nearly bone stock 428cj build. If we accept that 385 gross hp for the 428cj, we can deduce the following: a.
Simply stated G/Wh links efficiency and performance by illustrating how many gallons of water are pumped using one watt hour of electricity. To calculate G/Wh, take the gallons per hour (GPH) pumped, divided by the power the pump consumes in watts. GPH/W = G/Wh
A typical turbocharged V8 diesel engine might have an engine power of 250 kW (340 hp) and a mass of 380 kg (840 lb), [1] giving it a power-to-weight ratio of 0.65 kW/kg (0.40 hp/lb). Examples of high power-to-weight ratios can often be found in turbines.
Emission regulations caused a progressive reduction in compression ratio for the 302 two-barrel, to 9.0:1 in 1972, reducing SAE gross horsepower to 210 hp (157 kW). In that year, U.S. automakers began to quote horsepower in SAE net ratings; the 302 two-barrel carried a net rating of 140 hp (104 kW).
At its introduction it was rated at 400 hp (298 kW), SAE gross, and 550 lb⋅ft (746 N⋅m) of torque. For 1971, compression was reduced from 10.0:1 to 8.5:1, the lowered compression ratio dropped the 500's gross output from 400 bhp (298 kW) to 365 bhp (272 kW), or 235 hp (175 kW) in the new SAE net ratings. By 1976, its final year, it had ...