Page 225 of 2009 Performance Parts by Ford Racing Performance Parts

small block v8 engines 289/302/351w/351c/351m/400 six ways to build a winner ford has manufactured millions of small block v8s over the past 30 years and ford racing parts are available for many of them you have a choice of six engines to modify eight if you count two high-performance boss versions so you ve got great flexibility working for you whether you begin with a complete engine assembly or a bare block all have four-inch bores but there are differences that affect parts interchange for example the water passages described on page 224 here s a brief description of ford small blocks 289hi-per 302boss 289/302 the 289 was produced from 1963 through 1968 and the 302 from 1968 to the current model year they re very similar except for stroke of special interest is the 289-4v hi-performance engine 1963-67 with mechanical camshaft threaded rocker arm stud adjustable and a recessed spring seat most other 289/302 1968-76 engines use a press-in stud 1978 and later 302 engines use a modified pedestal as shown on page 230 many 289/302 parts fit earlier 221/260 engines which had smaller bores they also had less metal around the bores so you can t overbore to come up with a 289 the 1985 model mustang gt introduced a new high-output 302 with roller tappet camshaft electronic fuel injection was added in 1986 351w 5.0lh.o sefi 302 boss this is certainly one of ford s all-time super engines the 302 boss 1969-70 proved to be very competitive in 5 liter transam racing it featured big breathing heads with canted valves mechanical cam stamped rocker arms with a threaded adjustable stud push rod guide plates forged crankshaft 4-bolt main caps 2 #3 and #4 journals beefy con rod with spot-face for .375 bolt and forged pistons modular v8 engines 4.6l sohc 4.6l dohc 5.4l sohc 351w windsor the windsor engine plant builds this engine hence the name normally this isn t important but another engine the 351c for cleveland engine plant has the same displacement that s about all they have in common so it s always important to differentiate between the two the 351w is a beefier block than the 289/302 but has the same bore spacing 4.38 and bore diameter 4.00 so heads retrofit a higher deck height requires a unique intake manifold main journals 3.00 are larger than the 289/302 2.25 camshafts interchange but the 351w has a different firing order 1-3-7-2-6-5-4-8 vs 1-5-4-2-6-3-7-8 for the 289/302 except 1982 and later 302 ho which use the 351w firing order the 351w has been used from 1969 to the current year in 1991 ford unleashed a new era of muscle one that is propelling us into the future the modular engine focuses on low friction excellent sealing and increased block stiffness the design results in an extremely smooth-running engine using aluminum heads and having all accessories rigidly mounted to the engine both the engine block and head are machined to close tolerances to produce a very precise assembly the head bolts of modular engines actually extend past the cylinder bores into the bearing webs eliminating bore distortion and providing a better head gasket seal the sophisticated overhead cam design uses roller finger followers to lower friction and increase the rpm potential of the engine on the bottom end the deep skirt engine block and cross-bolted main caps contribute to a highly rigid assembly two engine plants manufacture modular engines romeo produces all passenger car versions and windsor produces the modular truck engines here s a brief description of modular v8 engines 4.6l sohc the 4.6l sohc 2v was first introduced in 1991 this engine is the basis for all modular engines and is used in passenger cars as well as the trucks the block is cast iron with a nodular crankshaft while the heads are aluminum using an in-line valve design with 1 intake and 1 exhaust valve per cylinder all passenger cars have press fit piston pins while all truck engines have full floating piston pins to improve durability 4.6l dohc the 4.6l dohc 4v was first introduced in the mark viii however in 1996 a similar version of this engine found its calling the mustang cobra the aluminum block and four-valve head make for a powerful combination producing 305 hp 7000 rpm internally the 4-bolt cross-bolted main bearing caps provide the support necessary to easily handle the high rpm potential of the forged steel crankshaft this engine uses hypereutectic pistons with full floating piston pins and upgraded connecting rod assemblies to improve durability 5.4l sohc the 5.4l sohc 2v triton engine released in trucks for 1997 is producing favorable reactions this engine has a cast iron block forged steel crankshaft full floating piston pins and special 6000 rpm connecting rods it is the 5.8l pushrod engine replacement www.fordracingparts.com 223

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