428 Cobra Jet Engine Specs


Ford Motor Co. introduced the first V-8 engine in a low-cost car in 1932. The Ford FE-type V-8 engine was introduced in 1958 so that Ford buyers would have the option of powering their cars with a larger, more powerful engine. The original FE engine displaced 332 cubic inches. The 428-cubic-inch version of this engine was introduced in 1966 and was optional in full-sized Ford cars and Thunderbirds. Beginning in 1968, performance buffs wanting even more horsepower than the standard 428 engine produced could opt for the 428 Cobra Jet engine. The 428 Cobra Jet engine was available in certain Ford cars from 1968 to 1970.

Engine Specifications

  • The 428 CJ engine displaced 428 cubic inches and had a 90-degree V-8 cylinder configuration. The valves were located in the detachable heads and were operated by hydraulic lifters. The horsepower output of this engine was 335 at 5,400 rpm, while the torque rating was 440 feet-pounds at 3200 rpm. The bore and stroke was 4.132 by 3.984 inches and the compression ratio was 10.6-to-1 in 1968 and 1969 models and 11-to-1 in 1970 models.

Unique Cobra Jet Specifications

  • The Cobra Jet had four-bolt main bearing caps. Standard 428 engines had only two-bolt main bearing caps. The Cobra Jet also had high-efficiency cast iron intake and exhaust manifolds. A Holley 4150 four-barrel carburetor was used for fuel delivery and had an automatic choke in 1968 and 1969 models and a manual choke in 1970 models. The 428 CJ had a different crankshaft than other 428 engines, and was externally balanced by a harmonic balancer mounted on the end of the crankshaft at the front of the engine block.

Tune-Up Specifications

  • The 1968 and 1969 models used a single-point distributor, while the 1970 models used a dual-point setup. All points should be set at a .2-inch gap. The dwell angle should be checked with a dwell meter and set to between 30 and 33 degrees. The ignition timing should be set to 6 degrees behind top dead center. The cylinder firing order for the 428 CJ is 1-5-4-2-6-3-7-8. The idle speed should be set to 725 rpm on cars with manual transmission, and to 675 rpm for cars with automatic transmission.

Related Searches


Promoted By Zergnet


You May Also Like

  • How do I Identify a 1968 Ford 428 Engine?

    Many believe the era of Ford muscle-cars began in 1968 with the introduction of the 428 Cobra-Jet engine. This monster, capable of...

  • How to Identify a 429 Ford Block

    Ford often used identical blocks for engines of different displacement, making it visually difficult to identify them without looking at other engine...

  • How to Set the Timing on a Ford 390

    The Ford 390-cubic-inch V-8 engine was produced from 1961 to 1976. It is a member of the "FE" series of engines that...

  • How to Identify a Ford 428 Engine

    The FE series of Ford engines has not been produced since early 1970. FE engines look the same when viewed from the...

  • Modified Ford 390 Horsepower Specs

    Ford sent the stock 390 engine from the factory with impressive horsepower. The company made it easy and cheap to modify with...

  • Specifications of a Ford 429

    Ford began installing mass-produced flat-head V-8 engines in its cars and trucks in 1932, several years before its other low-priced rivals. Ford...

  • Pontiac 428 Specs

    The Pontiac 428 cubic inch engine was used only from 1967-69. It was one of the largest engines Pontiac produced, but it...

  • 429 Engine Dwell Angle Specs

    Measured in degrees, dwell angle represents the amount of time the primary circuit closes in order to charge the distributor's primary windings...

Related Searches

Check It Out

How To Travel For Free With Reward Points

Is DIY in your DNA? Become part of our maker community.
Submit Your Work!