cougar1 said:Paul, It's Hi Po, (short for High Performance).
In short it's a 289 with a high nodular steel crank, stouter main caps ,forged connecting rods with 3/8" bolts, cast flat top pistons, a solid lifter cam with a healthy profile, screw in rocker studs, four bbl carb (480 cfm), streamline exhaust manifolds , and dual point distributor..
Hope that answers the question..
P.S. only about 17000 were produced.
Actually the 289 Hi - Po crank is the same cast iron crank as any other 289. The only difference is that they were tested by means of a Brinell hardness check for the presence of higher nodularity. For that reason finding a crank with a Brinell hardness test is meaningless. There must have been cranks that failed the test. They would have gone into a regular 289.
289 Hi Po rods are forged steel. So are all Ford connecting rods for 289's, 302's, 351's, 390's and any other Ford product of the 1960's. The Hi - Po rods are a different, beefier forging and yes they do use larger bolts.
No Cougars received a 289 Hi - Po from the factory.
In this day and age there are Ford crate motor 302's that offer a lot more performance for less money. Leave the Hi Po 289 stuff to the numbers must match Mustwang and Shelby guys who enjoy the thrill of pushing their cars on and off the enclosed trailer.
:spit:...Leave the Hi Po 289 stuff to the numbers must match Mustwang and Shelby guys who enjoy the thrill of pushing their cars on and off the enclosed trailer.