The disc is 10.4, 8 springs, 2 orange stripes & gray springs. Brown cover, white springs & 2 white stripes. The disc is 10 ” with 6 springs, green color, orange springs.Ĭlutch Information. The 289 HiPo 4 speed is a 10.4 inch 9 spring pressure plate. Pressure plate is 10 ” w/ 9 springs, Blue cover, purple springs bronze stripe. Engine Basics YearĨ cylinder, 90 degree, Overhead Valves (OHV) The counterweight was both keyed to the crankshaft and indexed to the sprocket with a 1/8″ roll pin. As a result a special crank sprocket was used, C3OZ-6306-A, itself being 0.150″ thinner than the normal 289 sprocket. The add-on counterweight was 0.150″ thick.
The special damper also had a larger more massive inertial ring. Moving the mass in towards the front main bearing reduced bending loads on the crankshaft. imbalance found in the normal small block damper was moved to the additional counterweight. To prevent 4th-order harmonic vibrations from destroying the crankshaft at higher RPM, the engine used a different vibration damper and an add-on counterweight. The 289 HP featured a high nodularity cast iron crankshaft that was Brinell hardness tested to ensure quality. The engines used in the 1965-67 Shelby GT 350 Mustangs, rated at 306 HP, featured a high rise aluminum Cobra intake manifold and Tri-Y headers. Stronger connecting rods with 3/8″ bolts, thicker main bearing caps, solid lifter cam, screw-in rocker arm studs, machined valve spring seats, forged steel exhaust valves, a dual point mechanical advance distributor, and better flowing exhaust manifolds rounded out the package. In 1963 Ford released the 289 High Performance engine which produced 2 RPM. Good God, is it any reason people hate and distrust the government and its officials.Įngine colors when it first came out were black block and gold valve covers. Government screwed up the gasoline and regular gas was good (and cheap). Shelbys were to run the super premium and all other cars performed on regular gas.
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“K” code cars between 19 ran best and the super premium gas after that, premium gas was recommended. Super hot engines like the HiPo 289 thrived on the super premium gas. You younger readers may not even know that in the 1960’s you could buy a super premium gas right at the pump! Sunoco was the best as I remember it. All engines installed in Mustangs had a cast iron block. “K” cars received the dual-points mechanical advance distributor. All intake manifolds were cast iron except the Shelby versions that were cast aluminum.
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Shelby GT350’s were blessed or cursed (opinions waver) with a Holley 4160-C 4V and a manual choke.Īll non-“K” cars were equipped with a single point, vacuum advance distributor. In 1965 & 1966 they went to a manual choke. For those power hungry individuals that ordered a “K” car the Autolite 4100 (4V) with an automatic choke was installed. If Your car had the “A” code, from 1965 – 1967 the engine was equipped with an Autolite 4100 (4V – 1965-66) and in 1967 it received an Autolite 4300-A (4V) square bore base with an automatic choke. If you wanted the “D” coded car in 1964 & 1965 you received an Autolite 4100 (4V) equipped with an automatic choke. If you wanted the two barrel setup, you received an Autolite 2100 equipped with an automatic choke.
In 1965 through 1966, you could get the 289 in either a 2 barrel or four barrel version.
It was dependable, economical to maintain, had adequate power and was easily modified. This is Ford’s V8 90 degree overhead valve engine that everyone wanted in the first few Mustang years.