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The Boss 351 was the most potent high-performance variant of the 351C available only in the 1971 Boss 351 Mustang. Rated at 330 bhp (246 kW), it was fitted with a four-barrel Autolite model 4300-D spreadbore carburetor, an aluminum intake manifold, solid lifters, dual-point distributor, a six-quart oil pan, and cast-aluminum valve covers.
With the rev limiter disabled it is theoretically capable of 252 km/h (157 mph) and can exceed 7,000 rpm in fourth gear. The rev limiter is set to 6,150 rpm. The engine type was a 351 Cleveland (carried over from the XW GT/GT-HO Phase II). While Ford stated an output of 300 horsepower, the engine was reputed to produce over 350 horsepower.
The 351W (Windsor) made its debut in 1969; it is often confused with the Ford 351 Cleveland, a different engine of near identical displacement that also began production in 1969. The 351.9 cu in (5.8 L; 5,766 cc) Windsor featured a 1.3 in (32.5 mm) taller deck height than the 289/302, allowing a stroke of 3.5 in (88.9 mm).
The chart does not reflect the Boss 351 variant of the 351 Cleveland or 250 cu in I6, as neither were available in the Mach 1 package. The 1972 R-code 351HO package – essentially the solid-lifter Boss 351 engine from 1971 with a reduction in compression from 11.0:1 to 8.8:1 – is listed here, as it was available with the Mach 1 package that ...
Optional engines included the 302 cu in (4.9 L)-2V (standard on GTs), the new for 1969 351 cu in (5.8 L)-2V Windsor, 351-4V Windsor, 390 cu in (6.4 L)-4V, and the 428 cu in (7.0 L)-4V Cobra Jet (standard on Cobras). The 428 CJ was available with or without the Ram Air Induction package, however, those with Ram Air still carried the same ...
At mid-year, Ford offered a slightly detuned Boss 351 engine, which could be ordered with any model. A total of 398 Mustangs were built with the drag race-oriented R code engine and were designated as the 351 HO. Mandatory options were the top loader 4-speed, competition N case rear end (427, 428, 429, Boss 351, 351HO), and air conditioning delete.
This page was last edited on 21 November 2021, at 03:17 (UTC).; Text is available under the Creative Commons Attribution-ShareAlike 4.0 License; additional terms may apply.
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