difference between 428 and 428 cobra jet

Right to the end in 1970, the 335hp rating stuck. The package included special capscrew-type connecting rods borrowed from the Ford GT Mark IV 427 Le Mans engine. The PI ran stock 390/428 heads, an aluminum intake, the same cam as the CJ and a 600 CFM carb. The 351 Cobra Jet was the final Cobra Jet engine that Ford released, and it lasted from 1971-1974. Of course there's the Boss 429, but thats a horse of completely different color. Be sure to subscribe if you like content like this! The SCJ block is the same as a CJ. It was very similar to the standard 351 Cleveland engine, but with a few key differences. The big FE also became notorious as one of the powerplants for Carroll Shelby's outrageous big-block-powered version of the AC Cobra. 385cm = 151.6 inches. Although the '67 Mustang looked a lot like the original, it was, in fact, a completely new car with no interchangeable sheetmetal. Piston part numbers are marked (R) for red size and (B) for blue size to note options for selective fit based on normal production tolerances. The real cobra jet block had reinforced webbing as well as a higher nickel content, i.e. Included in any Cobra Jet package was a choice of the durable Top Loader four-speed transmission or a heavy-duty C6 three-speed Cruise-O-Matic, and of course the famously sturdy 9-inch rearend. I spoke to Rob Celedon the other day and his SCJ car has the same stamp on the block. Sunroof has a big brain. In the quarter-mile, a one-second difference is a lot of car lengths. In four years of its existence, the Cobra Jet name became synonymous with high-performance. The 351 Ford Cobra jet also had four-bolt mains, hydraulic valve lifters, high lift/duration cams, and larger valves than the standard 351. It's important to note that all other components of the SCJ engine do in fact interchange with the CJ engine. The valves are bigger but the real improvement is the exhaust port which is both wider internally and straighter plus higher exit point in the casting. The Super Cobra Jet, available only with a 3.91 or 4.30 rear axle ratio, included additional features. Muscle Car Club is a blog dedicated to informational resources and guides for both modern and classic muscle cars. The 429 blocks are incredibly solid, and the Cobra Jets got a high nodularity, Brinnel tested crank and forged rods. A special option available for 1969 in the Cobra Jet Mustang included a 428 with internal modifications. There were three original Cobra Jets, the 351, 428, and 429. The two-barrel 390 was good for 265 horsepower, the four-barrel stepped up to 325, and the Cobra Jet 428 provided just ten additional horses but a fair torque boost to go with it. Ford introduced their second generation of FE V8 big block engines in 1962 with the 406 cid big block. Includes year, model, engine, 1/4 mile times, and moreabsolutely free! When the buyer selected the CJ option, the GT option became mandatory. Ford released the original 428 in 1966, and in 1968 the Cobra Jet variant was born. It was fortuitous that Tasca Ford nudged Fordand Ford listenedbecause the 428 Cobra Jets and Super Cobra Jets are amongst the baddest Ford Muscle Cars you could drive off the lot from 1968-1970. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. When the Ford execs at their plant in Dearborn, Michigan saw Tascas KR-8 428 engine in person they were impressed. In the November 1969 issue of Super Stock and Drag Illustrated magazine, a 70 Mach 1 made a 14.11-second quarter-mile pass, traveling 101.1 miles per hour. You can also check the build dates on the parts as well because they did not start pitting them in production cars till about March of 1968. Finally, the PI and CJ blocks of a given era were the same. It was rated at 375HP (grossly underrated). Mustang buyers who selected either of the optional 3.91:1 or 4.30:1 rear end gear ratios got more than just an optional axle ratio! Cast iron exhaust manifolds. The Cyclone was now part of the Montego family of vehicles. The block and head were both cast iron, but some models may have had aluminum intakes instead of cast iron. In order to keep the car eligible for the stock NHRA category, Ford capped power at 430 horsepower. I have a 428 FE engine in my car from back in the day (60's). Actually, rebuilding a 428 using modern methods costs significantly MORE than $2,500. Beyond that, the so-called Thunderbird 428 offered in fullsize Fords and T-birds made 345 hp, 10 more than the CJ despite its milder cam, low-rise iron intake, 446-cfm Ford 4300 series four-barrel carburetor, and clunky log-style exhaust manifolds. However, the Ford production database describes the car as having an S-code 3.50:1 traction-lok rear. These had the larger 600 cfm 4100. p.s. However, it wasn't Ford Engineers that first developed this impressive powerplant. Compression was lowered from 10.7:1 to 9.0:1, and in 1971 it actually made 5 horsepower less than the standard 351 at 280 horsepower. Super Cobra Jet Crankshaft In 1968, Ford released the first versions of their now famed V8 Cobra Jet engines. Not too common, maybe a total production of 15,000. Pontiac had its GTO as well as the new twin sister to the Camaro, the Firebird, and each was available with a 400ci engine. I want to register an account for free right now! YES! Typically 360 horsepower. Though different part numbers were used for standard sized CJ and SCJ pistons (perhaps to provide slightly different installation tolerances), most folks that I've talked to believe that the pistons were in fact identical. The SCJ timing pointer is slightly longer to clear the larger harmonic balancer. A limited number of Cobra emblems placed strategically on the exterior warned people what lurked under the hood. Yet, while they were considered big blocks, the first generation of the Ford FE never had displacements of larger than 400 cid. 3) An oil cooler Pioneered in 1967 as a stripped-down Holman and Moody prepared drag-ready Mustang for Tasca Ford, the 428 short block with 427 heads christened the KR-8 flawlessly balanced proven race engineering with factory Ford parts. In the go department, a real grabber (335 horses). The big difference was the price (at $622, the 427 cost $188 more than the $434 428 CJ), transmission availability (the 427 was only teamed with the C6 automatic), carburetors (the 427's single Holley four-barrel rated 600 cfm, 135 less than the 428 CJ), and rated output. The 385-series 429 and 460 are also good street-strip engines, with their canted valves and large bearings. That is, the performance motors were either a CJ or a SCJ. Ford was not caught in flagrante delecto, however. The Ford 428 Cobra Jet was the high-performance version of the 428 FE engine, quickly overtaking the low-revving 390 CID V-8 as the high-performance powerplant of choice. The big difference was the price (at $622, the 427 cost $188 more than the $434 428 CJ), transmission availability (the 427 was only teamed with the C6 automatic), carburetors (the 427's single. Cobra Jet engines received low-riser heads with a "rough-cast" combustion chamber (2.09int.-1.66ex. Two-bolt main block Between 345-360 horsepower 428 Super Cobra Jet Internal structure differences included Lemans type cap screw rods But times were changing, and sales were soft for performance cars across the board, and not just at Ford. Technically a midyear offering, the 1968 1/2 CJ combined 427 Low Riser heads, a cast iron copy of the aluminum 390 Police Interceptor intake manifold, the 390 GT's hot hydraulic cam, a healthy 735-cfm Holley four barrel, and streamlined exhaust manifolds to fight off the 396s, 440s and 400s from the competition. Super Cobra Jet horn jumper wire. The front maintained a full-width grille with an updated horizontally slatted grille, and, in the rear, the Cougar now came equipped with taillight lenses that were concave instead of convex. * These are service part numbers, not engineering numbers. The difference was forged pistons, solid lifter cam and four bolt mains. Information provided by Phil Wassil and by Kevin Marti of Marti Auto Works documents Detroit Locker availability beginning around November 1969 - in the 1970 model year! Slightly smaller in bore but longer in stroke, the 428 ran smoothly in street trim, but it was still a very powerful engine, with mountains of torque. Super Cobra Jet Connecting Rod They had introduced the 385 series in 1968 to start replacing the outgoing FE series. The A blocks were the earlier type. 1968 was the only second year of the Cougar, which only received minor revisions, including side marker lights and front shoulder belts. First you have to start with the 428 v.s. Nineteen-seventy was the last year for the venerable FE-series big-block engine in the Mustang and Cougar. 428 Police Interceptor, and 429 ThunderJet, used in big luxury cruisers. Representation from nearly all Cobra/Daytona/GT40 manufacturers Help from all over the world for your questions Build logs for you and all members Blogs 22 Though some claim the 428 CJ actually made in excess of 400 hp, we observed 365.1 hp at 4,800 rpm, almost 10 percent more than advertised. Needless to say, the success of the Cobra Jet package guaranteed its reappearance for the '69 model year. Cast iron intake manifold identical to the aluminum one on the police interceptor. Twenty three years later 1992 bought a 289 GT Coup but soon installed a FE with cylender head mods and solid roller cam have ran a best 1.33 60 foot and a 6.39 eighth mile. The big-block Chevy had the edge in breathing ability, but this move closed the gap between the two engines a great deal. In 1958, Ford introduced their first line of big block motors, known as the Ford FE engines. The 1975 MPC also excludes 1970 from the list of application years for the C9ZZ-13826-A bracket -its only listed for the 1969 Mustang equipped with a 428-4V or Boss 302 engine, but it was also positively used on the 1969 Boss 429 as well! At the same time, a Ford dealer named Bob Tasca was also looking to get more power out of his 390-powered Mustangs. The basic strength of the Super Cobra Jet engine is in a more durable reciprocating assembly (crank, rods, pistons, wrist pins, flywheel/flexplate, and harmonic balancer) that was designed to withstand the higher RPM requirements of drag racing. The 428 also got a single snorkel air cleaner and had a Holley 735 cfm carburetor. The basic strength of the Super Cobra Jet engine is in a more durable reciprocating assembly (crank, rods, pistons, wrist pins, flywheel/flexplate, and harmonic balancer) that was designed to withstand the higher RPM requirements of drag racing.

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