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Ford developed two high-performance street versions of the 429 between 1969 and 1971, the Cobra Jet and Super Cobra Jet. The Cobra Jet (429CJ) was fitted with a Rochester Quadrajet 715 cu ft/min (20.2 m 3 /min) Spreadbore 4-bbl carburetor, a larger camshaft; a special set of cylinder heads (DOOE-R) 73.5 CC, combustion chamber and canted valve ...
The distinctive enormous valve covers on a semi-hemispherical head Boss 429 engine The Boss 429 was produced in limited numbers in 1969 and 1970. Its origin is twofold: allow Ford to homologate its new Ford 385 engine -based semi-hemispherical 429 V8 for NASCAR racing, and to provide a big block alternative to the 5.0 L and under Trans Am ...
In the 1980s, many U.S. production engine remanufacturers began reaming valve guides, rather than replacing them, as part of their remanufacturing process. They found that by reaming all the valve guides in a head to one standard size (typically 0.008 in. diametrically oversized), and installing remanufactured engine valves having stems that are also oversized, a typical engine head can be ...
The 428 Cobra Jet was a performance version of the 428 FE. Launched in April 1968, it was built on a regular production line using a variety of cylinder heads [30] combined with a 735 CFM Holley four-barrel carburetor. The Cobra Jet used heavier connecting rods with a 13/32 rod bolt and a nodular iron crankshaft casting #1UB.
351 Cobra Jet; 302 Windsor V8; 351 Windsor V8; 400 Cleveland Ford 335 engine#400 V8 aka 400FMX certain 1973 casting numbers D1AE and D3AE, mated to the FMX transmission) 3.8/3.9/4.2L Canadian Essex 90° V6 (RWD only) 240 I6; 300 4.9 I6; 4.6L Modular V8 (first two casting runs, numbers F1AE and F2VE) 302 5.0L Windsor V8; 351 5.8L Windsor V8
The Mach 1 was equipped with a 4.6 L DOHC 305 hp (227 kW) engine based on the engine available in the 1999 and 2001 Mustang Cobras, with new cylinder heads from the 2003 to 2004 Cobra (see above). The interior of the car was given a retro theme with seats made to look like the "comfort-weave" seats available in the 1960s-era Mach 1s.
The 1994 Cobra was introduced midway through the model year with the same engine as the 1993 Cobra. With its GT-40 cast-iron heads and lower intake and its Cobra-specific upper intake, [1]: 36 power increased to 240 hp (179 kW; 243 PS). [1]: 34 However, the actual output of the Cobra's GT-40 enhanced engine was probably higher.
A hemispherical head ("hemi-head") gives an efficient combustion chamber with minimal heat loss to the head, and allows for two large valves.However, a hemi-head usually allows no more than two valves per cylinder due to the difficulty in arranging the valve gear for four valves at diverging angles, and these large valves are necessarily heavier than those in a multi-valve engine of similar ...