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Prior to the 1972 model year, American automakers rated and advertised their engines in brake horsepower, bhp, which was a version of brake horsepower called SAE gross horsepower because it was measured according to Society of Automotive Engineers (SAE) standards (J245 and J1995) that call for a stock test engine without accessories (such as ...
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 ...
As impressive as the ZL1 was in its day, actual engine dyno tests of a certified production line stock ZL1 revealed 376 hp (280 kW) SAE net with rated output swelling to 524 hp (391 kW) SAE gross with the help of optimal carb and ignition tuning, open long tube racing headers, and with no power-sapping engine accessories or air cleaner in place ...
Last car on list measured by SAE gross power. [72] Porsche 959 S: 1988 379 kW (508 hp; 515 PS) 29 produced. ... (1,888 hp; 1,914 PS) 150 units to be produced. First ...
A high-performance 327 cu in (5.4 L) variant followed, turning out as much as 375 hp (280 kW) (SAE gross power, not SAE net power or the current SAE certified power values) and raising horsepower per cubic inch to 1.15 hp (0.86 kW). From 1954 to 1974, the small-block engine was known as the "Turbo-Fire" or "High Torque" V8.
It was initially rated (SAE gross) at 250 hp (186 kW) with a two-barrel carburetor (referred to as "2V" in engine designations) or 290 hp (216 kW) with a four-barrel (designated "4V"). Emissions compliance led to a compression drop in 1971, and when Ford switched to net power ratings in 1972 power ratings had fallen to 153 to 161 hp (114 to 120 ...
The HT-HQ advertised power figures for the 253 and 308 were respectively: 185 hp and 240 hp. The SAE Gross figures for these engines was 175 hp and 227 hp. GMH Technical and Engineering literature shows these revised power figures for HJ but it took a while for it to appear in Sales literature - LX Torana release information shows the 4.2L as ...
The 396 V8 dropped from 350 to 300 hp (220 kW) SAE gross (260 hp (190 kW) SAE net) due to compression ratio drop from 10.25:1 to 8.5:1. Production and sales dropped due to a 67-day corporate-wide strike at GM that coincided with the introduction of the 1971 models in late September 1970, along with a continued declining interest in the ponycar ...