The cams underwent the same engineering standards, and were developed by the same team as the original BOSS components. These cams are available from Ford Racing, the intake cam set is part number M-6550-M50BINT, and the exhaust cam set is part number M-6550-M50BEXH. Both of these cams measure 13 mm gross lift with 263 degrees duration on the intake cams and 290 degrees duration on the exhaust. To that end Ford Racing supplied us with a set of intake and exhaust cams to liven up things in the horsepower department. Upgrading a BOSS to be the ultimate naturally aspirated example wouldn’t be complete without revisiting the camshafts. Right: With everything out of the way the cam covers and timing cover can be carefully removed. Center Right: All of the bolts for the timing cover are then removed. Center Left: Next the crank pulley needs to come off. Left: Disassembly to install the new cams and intake manifold begins by removing the front accessories and water pump. It also uses a high flow air filter and molded plastic housing to supply that filter with plenty of fresh air. This air intake has a huge 102 mm air inlet diameter to feed that hungry throttle body. That throttle body breathes through a Ford Racing Cobra Jet Cold Air Intake Kit, part number M-9603-M50CJ. The unit is calibrated for stock idle air flow characteristics and also uses stock throttle body gearing to prevent bind or wear. It’s ready to bolt on without the need to transfer the factory electronics. Machined from billet aluminum and featuring big 65 mm twin inlets, this throttle body is capable of inhaling a massive 1,517 cfm. The intake also had to meet all of Ford’s critical testing requirements leading to a piece that has OE level quality fit, finish, and performance while delivering aftermarket level performance gains.īringing the air into that Cobra Jet intake is a Ford Racing 65 mm Cobra Jet Billet Aluminum Throttle Body, part number M-9926-CJ65. This intake was designed, engineered, and tested by the same team that worked on the BOSS 302 program. Dave Born, Ford Racing Born tells us that the Cobra Jet intake was designed with the BOSS engine in mind. That solves several of the packaging constraints of the BOSS manifold. With the Cobra Jet intake we’re dealing with enthusiasts who are bolting this part on at home or in a shop environment. There’s also no interference from the injector pockets with the intake runners on the Cobra Jet intake. The Cobra Jet manifold features larger intake runners and is devoid of the interference in the bell mouth on the rear runners for cylinders four and eight that were mandatory for the production line BOSS piece. From there the project continued to evolve with engineers seeking to find other ways to improve on the airflow of the BOSS. The Cobra Jet manifold is an evolutionary product that began with engineers installing a larger oval or dual-bore style throttle body inlet onto a BOSS intake for testing. “This lower volume intake allows us more flexibility with the design.” That solves several of the packaging constraints of the BOSS manifold,” says Born. “With the Cobra Jet intake we’re dealing with enthusiasts who are bolting this part on at home or in a shop environment. Ford Racing says the manifold is tuned to provide peak power at 7,750 rpm. That’s where the Ford Racing Cobra Jet intake manifold, part number M-9424-M50CJ, picks up what the BOSS had to leave behind.Īn evolution based around the BOSS 302 intake concept the Cobra Jet intake manifold is a no compromises intake for high winding 5.0 engines. That doesn’t mean it’s not a good intake, but sometimes you can do better when you don’t have to produce a part for mass consumption. As a result the BOSS intake had to make a few compromises before it ever made it down the assembly line. According to Ford Racing’s Dave Born, this intake still had to meet many production standards, like packaging constraints for the assembly line. The BOSS intake is not without some drawbacks. This high-rise, long-runner piece has become a favorite of enthusiasts and flows more air than the standard 5.0 intake found on the Mustang GT. Part of what gave the BOSS its high-revving ability and more horsepower was its unique intake manifold. The more air you can inhale and exhale, the more efficient and powerful the pump becomes. You’ve no doubt heard the comparison of an internal combustion engine to an air pump.
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