Ford Boss 302 engine
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| Manufacturer | Ford Motor Company |
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| Successor | Ford Boss 351 V8 |
| Displacement | 302 cu in (4.9 L) |
| Cylinder bore | 4 in (101.6 mm) |
| Piston stroke | 3 in (76.2 mm) |
| Valvetrain | OHV |
| Fuel system | Normally aspirated |
| Power output | Overrated at 290 hp (216 kW) @ 5900 RPM |
| Torque output | 290 lb·ft (393 N·m) @ 4300 RPM |
The Boss 302 engine is a high-performance small-block V8 from Ford Motor Company. It was a hybrid of small-block Ford V8s - It used the block of the small Ford Windsor engine and the heads of the larger Ford Cleveland engine. It was created for the SCCA's Trans-Am road racing series, and was fitted to the Boss 302 Mustang.
The high nickel content block has a thicker deck, cylinder walls and beefy 4-bolt main caps. It is easily identified by screw in freeze plugs on the side of the block, pent roof valve covers, very wide heads and a very wide intake manifold. A Boss 302 has 8 valve cover bolts (because of the Cleveland heads) as opposed to the standard 302 having 7. The connecting rods are heavy, high strength steel forgings made for high rpm use. The crankshaft is a cross drilled high strength steel forging. The cam and lifters are high lift solid mechanical units.
The unique, wide, large port Cleveland style heads with staggered valve placement are what give the Boss 302 high power capabilities. Early units were typically characterized by very large intake and exhaust valves sitting in a small quench style combustion chamber.
The motor has a unique sound as a result of its solid lifter configuration. At idle, properly tuned, the engine has a great deal of 'chatter.'
The power output on this engine competes very well with other high performance smallblocks, like the Chevy 302, and the Chrysler 340. Although factory ratings were 290 horsepower, it's been proven that stock Boss 302 engines produce over 400 horsepower.
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[edit] Ford Racing Performance Parts BOSS 302 (2007-)
It is a Ford Racing crate engine, with displacement between 302 to 363ci. Entry level engines feature Ford Racing GT-40X Xtra Performance Turbo Swirl aluminum heads to retain stock exhaust locations and are rated at 340 and 345 hp. Higher performance versions include Ford Racing's Z-head equipped 302 and 347ci engines rated between 360 and 450 hp, depending on configuration. The highest power version is a 331ci rated 500hp.
The engine went on sale in 2007.
BOSS 302 was unveiled in 2006 SEMA show.[1]
[edit] Concept vehicles
In 2006 SEMA, 4 builders used the 302ci version of BOSS 302 engines:
- Dan Web – It was a 1933 Ford 3-window coupe with 390 hp BOSS engine.
- Galpin Ford – It was based on 2007 Ford Mustang featuring a 360 hp BOSS engine.
- Chip Foose – It was a 1970 Ford Mustang from the show Overhaulin'.
- Hotrods and Horsepower – It was a commemorative vehicle for the 2006 SEMA show with a 360 hp BOSS engine.
