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. I want to register an account for free right now! Introduced at the height of the high-performance wars, big-block Cobra Jets acquitted themselves well in the Mustang and in other cars. The original Ford Cobra Jets never made it past the 1970s, as increasing emissions restrictions and environmental and energy concerns ended up converging to squeeze the Cobra Jets out of existence. Royce: thanx for the clarification. In the quarter-mile, a one-second difference is a lot of car lengths. Typically 360 horsepower. While 1299 may seem like a lot( compared to the lightweight Galaxies, Thunderbolts, 427 Fairlanes and Boss 429's) it is a small fraction of the numbers . The 428SCJ was externally balanced with a counter weight behind a different harmonic balancer than the 428CJ. Educate me! Initially, Ford limited production to only 50, but later increased that by 250 due to popular demand. The 1969 description says that the Drag Pack option is "Available only with 428 CID 4V Non-Ram or Ram Air engines" and "Not available with other optional ratio axles or air conditioner". Welcome to Club Cobra! The Electric Ford Cobra Jet Mustang can blast through the quarter-mile in just 8.12 seconds at 172 mph, annihilating any Mustang that has ever been in production. Super Cobra Jets also had oil coolers as standard, which were options for the Cobra Jets. A whole host of high-performance parts was available for the 396 from the Corvette larder, which further complicated matters in Dearborn. all aluminum FE, Check the intake casting number, the head casting number and if the heads are of the bore and stroke. These had the larger 600 cfm 4100. I bought a 72' Thunderbird yrs ago it was still pretty powerful. In 1958, Ford introduced their first line of big block motors, known as the Ford FE engines. There is no word on when the next Ford Cobra Jet Mustang will be released, or even if there will be another one. Ford based the 429 Cobra Jets on their 385 series of V8 engines. He had been involved in the Thunderbolt program back in 1964. Also, there is an S between the 8 & the C Cobra Make, Engine: I Wish, Just an old truck with an FE, Cobra Make, Engine: Kirkham 427 (KMP 266); CAV GT40, also forged pistons,and an electronically balanced crank shaft on the SCJ;all reliability issues not HP ones. All this was none too soon. The 428 Cobra Jet returned, and all Mach 1s came standard with a rear sway bar, and the Shaker Hood was now available on all V-8s, not just the CJs. Last month, we brought you Part 1 of 3 on how to detail a 428 Cobra Jet engine to concourse level, with Marcus Anghel of . The 428SCJ used 427 LeMans connecting rods and different pistons, crank, wrist pins flywheel/flexplate, a cast-iron Police Interceptor intake manifold, and an engine oil cooler. See if you can determine if these motors you are looking at are CJ's. 1969 Ford Mustang Mach 1 428 Super Cobra Jet Muscle Car Of The Week Video Episode #91The Mach 1 handling and appearance package made for some good looking an. The 429/460 is going to be the cheaper of the engines to build. However, it wasn't Ford Engineers that first developed this impressive powerplant. ** I've also read reports of 428 CJ balancers with engineering numbers C8AE-AA and C8AE-AB, but I haven't personally seen one of these balancers -- have you? The 428 SCJ was first introduced during the 1969 model year. 3) An oil cooler FE & FT Big Block V8 (332, 352, 360, 390, 406, 410, 427, 428) - difference in 428 blocks? The 1975 MPC clearly notes that the 1969 and 1970 radiator core supports were serviced using two different part numbers (C9ZZ-16138-A and D0ZZ-16138-A); the report I have is that the 1970 support is shaped in such a way that the bracket doesnt fit and isnt needed. 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. The differences for the SCJ were: 1) The beefer 427 "LeMans" connecting rods. Yikes, that's huge! Two-bolt main block Between 345-360 horsepower 428 Super Cobra Jet Internal structure differences included Lemans type cap screw rods The facts became clear once 428 CJ Mustangs and Fairlanes started running high 13s at the strip with zero preparation. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. This victory was not lost on anyone--the public, the press, and Ford alike--much less the competition. The 428 was basically a bored out 427, though it performed better and was more reliable. It appears that Ford went through at least three piston designs during the 428 CJ and SCJ production run to address durability problems. Super Cobra Jet horn detail (note the jumper wire and reinforcement bracket) Unless specifically noted this comparison does not include the parts that are unique to the 428 Super Cobra Jet engine. YES! Though almost identical in displacement, Ford based the new 429 Cobra and Super Cobra Jets on the 385 series. In 1968, Ford released the first versions of their now famed V8 Cobra Jet engines. The longer stroke (3.98 vs. 3.78 for the 427) gave the engine powerful low-end punch. The 406 was essentially a bored 390, and in 1963 Ford went even bigger and bored the 406 out to 427 cid. Be sure to subscribe if you like content like this! And this dealer-inspired Ford racing engine couldnt have appeared at a better time for the Ford Motor Company. 370 HP (likely underrated), thick strong blocks and massive ports int he heads. Besides I have a reputation now First you have to start with the 428 v.s. The CJ 428 engine was the top-of-the-line performance option that replaced the former performance heavy-weight 427 CID V-8 in April 1968. I've heard from others who've reported finding C6AE-C, C6AE-D, and C6AE-F rods in what they believe to be original engines. This was remedied by the introduction of the all-new '67 Mustang. Last edited: May 19, 2013 FrozenMerc, May 19, 2013 SHARE POST #3 hoop98 Member Carroll Shelby, famous for his GT350 version of the Mustang as well as for the Cobra, became involved when he decided to produce a big-block version of his Shelby Mustang GT series. 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. Note that the reinforcement bracket used with the Super Cobra Jet horn arrangement appears to have been used only during the 1969 model year. The Police Interceptor contained an aluminum intake, high performance camshaft and beefier connecting rods to produce 360 hp. The full-page print ad for the 1969 Mercury Cyclone CJ stated it best: Cyclone CJthe high-performance fastback with the bold build and sports car spirit. The rarest of the bunch are the 68's. The most vaulable Cobra Jet is the 1968 Shelby GT500KR convertibles, which can go for as much or more than a BOSS 429. The 428CJ also used a superior cast iron intake and better exhaust manifolds. the 429 Thunderjet was an amazing engine,in 1981 when I was 16 I bought a 69 4 door Thunderbird for $500and OMG, that was the most powerful engine ever,it would burn the tires until it shifted into third gear. The "SUPER" mark does NOT mean that the pistons were used only in SCJs! The spirit of Bob Tasca and Carroll Shelbys original 427/428 hybrids still live on today if youre lucky enough to see one in person. The PI ran stock 390/428 heads, an aluminum intake, the same cam as the CJ and a 600 CFM carb. Very few were ordered because of the popularity of the new Mach 1 package. Increased Ebay value in a few strokes of a hammer! With more than 400 lb-ft available from 2,600 to 4,700 rpm, the Mach 1's tail is sure to be obscured in clouds of tire smoke. Connecting rod research seems to indicate that CJs used a variety of common high-end FE rods, with the C7AE-B rod being fairly common. It is remembered by those who love the Ford Blue Oval, and feared by others who would challenge the cars bearing the Cobra Jet name. Ford advertised the 428 Cobra Jet's horsepower at 335 (10 less than the Thunderbird) with 440 lb-ft of torque, and whether those numbers were accurate or not they didn't push past the 390 far enough to generate more than passing interest from the Mustang crowd for its inaugural 1968 year. Sales success of the Mustang had been phenomenal in its first two years, and Ford wanted more. The car automatically became a Super Cobra Jet. 1999 - 2022 Scott A. Hollenbeck. Comparison of Major 428 Engine Components, 1968 428 Cobra Jet Drag Strip Modifications, 428 CJ Mustangs at the 1968 NHRA Winternationals, Classic Mustang Warranty Plate/Certification Label Decoder, Cast iron, similar to PI with revised carburetor bore risers, relocated carburetor pad, and radiused riser to upper and lower logs to improve fuel/air distribution, Production 390 GT cast iron light car manifolds, Redesigned high flow, low restriction unique to the 428 CJ, Redesigned dual inlet with hot/cold start-up system. although the fastest factory car i have ever been in was and is to this day the 68 428scj mustang, and those cars are cars of record winning the 68' winternationals against the Hemi cars. Cobra Jet Mustang production continued into 1970. 1968 was the year the wild Mustangand all other Ford modelsfell prey to the untamed Cougar. The 335hp rating was nothing more than a ploy to distract the NHRA from the CJ's true ability, in hopes of getting more advantageous classifications in Stock and Super Stock competition. The 351 Ford Cobra jet also had four-bolt mains, hydraulic valve lifters, high lift/duration cams, and larger valves than the standard 351. p.s. Sadly, Ford discontinued the 429 Cobra Jet Mustang and other CJ-powered cars halfway through 1971. 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. Compression ratios were lowered considerably, and with this, performance often went out the window. The CJ block differs from the plain 428 due to the additional webs cast into the main bearing saddles. As referenced earlier, the 390 was a 4.050 bore and a 3.781 crank. I'm not going to provide an opinion, but I will show you how Ford Motor Company described this Mustang option on their 1969 and 1970 option price lists. The Mercury division of Ford put the 428 Cobra Jet in their Comets and Cyclones, and Shelby used one for his new GT500KR (King of the Road). 1968 428 Cobra Jet Drag Strip Modifications, 428 CJ Mustangs at the 1968 NHRA Winternationals, Comparison of Major 428 Engine Components, Classic Mustang Warranty Plate/Certification Label Decoder, Cobra Jet Crankshaft (engineering number detail), Super Cobra Jet harmonic balancer counter weight, 1, Super Cobra Jet harmonic balancer counter weight, 2, Super Cobra Jet harmonic balancer counter weight, 3, Super Cobra Jet harmonic balancer counter weight, 4, Super Cobra Jet horn detail (note the jumper wire and reinforcement bracket), Super Cobra Jet horn reinforcement bracket. There was some overlap of the C and A markings on the rear block face which means many early CJ's have the A on the block while many police and pasenger 428 engines have the C marking. Paul: Sorry to disagree. They also made a healthy 450 lb-ft of torque, which made for total increases of 35-40 horsepower and 10 lb-ft over the 428s. From 2008-2012, Ford used a supercharged version of their 5.4 L Modular V8. Carroll Shelby, Bob Tasca, and the Hybrid 427/428 Engines, Best Ford Fox Body Mustang Performance Upgrades. Ford wanted to develop a new high-performance engine to help compete against other newly introduced pony cars that had stolen market share. The 429 is a 70 complete out of a Lincoln or some other 4 door. Additionally, Ford simplified several exterior styling features due to a sales dip in 1969 attributed to aggressive styling. Lets look at the differences between a 428 Cobra Jet and the 428 Super Cobra Jet engine, shall we? It came in T-birds and full size Fords in the late 60's and early 70's. Bore and stroke was 4.0 X 3.5. This was not enough to beat the big-block Camaro, however, which ran the quarter a full second quicker. You should feel lucky to have driven your 69 Bird. The main bearing journal diameter measures between 2.7484 and 2.7492 inches. The back of the CJ block should have a "C" cast or welded into the back of it. If it's to be a "driver", compression needs to be lowered to use "pump . They did have a few XR7-G Cougars built that came with the first factory retractable sunroof though! Starting in 1966, you could also get a 428 Police Interceptor (only sold to police entities). For example, the SCJ used race-proven 427 "LeMans" capscrew connecting rods with shorter bolt heads, whereas the standard CJ rod used a more common press-fit bolt and nut to retain the rod cap. Lastly, Ford engineers externally balanced the SCJ engine with a counterweight behind a different harmonic balancer because they removed the center counterweight on the crank. But times were changing, and sales were soft for performance cars across the board, and not just at Ford. Come join the discussion about restoration, performance, modifications, classifieds, troubleshooting, maintenance, and more! 2) Cast iron PI (Police Interceptor) intake manifold. Ford introduced the Mach 1 Mustang in 1969, creating an instant smash hit that outsold the previously popular GT by 67,062 units shuttering the GT model at the end of the model year. Ford gave the electric Cobra Jet its name because it produces 1,400 horsepower and 1,100 lb-ft of torque. The Mercury Cougar underwent styling updates in 1969, including transitioning to Coke bottle styling and eliminating side vent windows. Certainly the 428 was a torque machine, and if you had enough carburetor for about 5,000 rpms, that was about as fast you needed to spin that engine anyway. Kevin later explicitly confirmed that "Ford did not produce 69 4.30 vehicles with Detroit Lockers. 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 Mustang had grown bigger than ever, with a weight of nearly two tons. Though I've seen references to engineering numbers on flexplates, I've never actually seen any kind of stamped or cast number on a flexplate.
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