![]() ![]() 005-inch, and the mains were torqued to 70 ft-lbs. ![]() 010/.010, so only needed polishing before being installed in the MAHLE/Clevite bearings. The 2.870-inch-stroke 289 crankshaft was already ground. Then a plan was developed to reKreate the K-code engine honoring as much of the original character as possible while using modern performance parts. Most recently, it was used for recent web stories covering the installation of a new radio, another carburetor and ignition swap, new fuel tank, and significant front and rear suspension upgrades.Ĭonstant overheating and an annoying internal knock prompted a decision to remove and disassemble the engine. The car was used for a few tech articles which appeared in the old Petersen Publishing’s Mustang Monthly magazine. This particular Mustang (and engine) has been in storage most of its life after the Ford remanufactured short block was mated to the original cylinder heads in the ‘70s rebuild. The pistons measured 4.038 inches on the coating inside the 4.040-inch bore. Ford also equipped the HiPo cylinder heads with threaded rocker studs and provided a slightly larger Autolite 480-cfm, 4-barrel carburetor with the K-code option.Ĭlearances were double checked. 460-inch total valve lift with 1.6:1 rockers and 310-degrees advertised duration. Perhaps the most iconic difference is heard and not seen the solid-lifter camshaft that boasted specs of. Some of the machine work at CNC Motorsports included balancing the rotating assembly with the flywheel and new ATI damper, torque-plate honing the block, and surfacing the cylinder heads. The K-code engine also has a centrifugal-advanced dual-point distributor, whereas standard 289 engines had a vacuum-advanced single-point distributor. It features a 2-inch-wide damper, compared to 1-inch-wide damper found on standard 289s. The K-code engine is easily identified from the other 289 engines when peering under the hood. The combustion chambers measured out to 53.6cc with the dished valves. Also, new Ferrea stainless-steel valves were installed. After a thorough cleaning, the heads received new bronze guides, new valve seats, and a valve job. The original cylinder heads stayed with the engine through its lifetime. Finally, an ATI Super Damper was constructed to mimic the distinctive K-code balancer. The stock rocker arms were quite tired, so a new set of COMP Cams Magnum roller-tip rocker arms were substituted. ![]() The new pistons also weigh 100 grams less than the stock models. JE Pistons supplied a set of SRP flat-top pistons with coated skirts and a thinner ring package. So, ARP Pro Series 5/16-inch Wave-Loc rod bolts were used. Here are some of the modern upgrades planned for this build, from left: The K-code has 3/8-inch rod bolts, but CNC Motorsports didn't feel there was enough metal in the stock rod to drill out the bolt holes. This accounted for less than one percent of the 1.8 million Mustangs produced in that time span. It was available from 1964 through 1967, and some 13,000 K-code Mustangs were built. The K-code engine was rated at 271 horsepower at 6,000 rpm with 312 lb-ft peak torque at 3,400 rpm. In the early days of the Mustang, the K-code was the only performance option - unless you spent a couple-thou extra for a Shelby GT 350 - which sported a modified 289 HiPo engine. Instead, this engine project will take advantage of new piston and camshaft technology along with upgrades developed for the lubrication, exhaust, and intake systems. The cost of restoring a 289 HiPo engine to Concours condition is too high, even if you can find NOS parts or surviving parts in good condition. Rather, this article is about “reKreating” the 289 HiPo engine with modern parts while retaining as much of the K-code character as possible. K-code engines in 1965 were painted black. The engine was painted blue in the ’70s when it was rebuilt with a Ford remanufactured short-block. Note, a few cosmetic and equipment changes were made to the engine in the time that surpassed after it came out of storage. Whipple Racing in Rapid City, South Dakota, removed the engine in addition to replacing the brake system.
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