Re: When did Ford drop the 300 straight 6 cylinder??

Posted by buickanddeere on February 06, 2012 at 14:14:36 from (209.240.114.221):

In Reply to: When did Ford drop the 300 straight 6 cylinder?? posted by JDseller on February 05, 2012 at 11:46:34:

Ford's Australian branch still manufactures these engines for their Falcon range.

Fourth generation

Truck Six
Production 1964 - 1996
Displacement 240 cu in (3.9 L)
300 cu in (4.9 L)
Cylinder bore 4"
Piston stroke 3.18" (240)
3.98" (300)
Fuel system Normally aspirated
Fuel injection
Power output 120 hp (89 kW) - 170 hp (127 kW)
Torque output 260 lb·ft (353 N·m)
Produced at the Cleveland Engine plant in Brook Park, Ohio from 1964 through 1996, the 240 and 300 Sixes are well known for their durability. Simple design and rugged construction continue to endear these engines to a number of Ford enthusiasts to this day. Many have run 300,000 to 600,000 miles (480,000 to 970,000 km) without any more service than standard oil changes.[citation needed] The engine has earned the terms "bulletproof" and "indestructible" by many. There are numerous claims of those who have purposely sought out to destroy one through abusive use, and were unsuccessful in doing so.
One example of the engine's sturdy design is the fact that no timing chain or timing belt (both of which can break, causing unwanted downtime or even engine damage) is used. This generation of Ford Six was designed with long-wearing gears for that purpose instead. Very few modern engines use timing gears; belts and chains are by far more common.
Both the 240 and the 300, no matter the application, used a single barrel Carter YF carburetor until the introduction of Electronic Fuel Injection. With proper gearing, many F-trucks and Broncos are able to achieve over 20 mpg with these carburetors, when properly tuned. This was heavily used by Ford's advertising campaign (some television advertisements and written literature even claimed 30 mpg), since the V8 engines in these trucks rarely achieved over 14 mpg.
The fuel economy of the 300 makes the engine a popular choice amongst truck enthusiasts that want both power and economy. The addition of performance parts (such as intake and exhaust manifolds with a four-barrel carburetor) place the engine power output near the same levels as the stock HO (high output) version of the optional 351 V8, with little or no change in economy. There are claims of 300s that have had the power output doubled, or even tripled, with less than a single mpg drop in fuel economy.

300
The 300 cu in (4.9 L) six was added for the F-series in 1965. It was essentially a 240 cu in (3.9 L) with a longer stroke. The two engines are nearly identical; the differences are in block dimensions, combustion chamber size, and the rotating assembly. It produced 170 hp (127 kW) (gross). The 300 became the base F-series engine in 1978 at 114 hp (85 kW) (hp number changes due to Ford switching to net power ratings in 1971). Power outputs were increased to roughly 122 hp (91 kW) during the early 1980s, before fuel injection was introduced. This became the primary engine of the line, eclipsing the 240. Unlike the Falcon engine, it featured separate intake and exhaust manifolds, which could be easily replaced with aftermarket manifolds offering the promise of even more power, through the installation of larger carburetors and a higher flowing exhaust system.
Also during the late sixties and early seventies, the 300 was used in larger vehicles such as dump trucks, many weighing into the 15,000–20,000 pound (7,000–9,000 kg) range. These 300s were equipped with a higher flow HD (Heavy Duty) exhaust manifold, since the engines were going to be constantly working in the 3000–4000 rpm range. These rare, yet effective manifolds had higher flow than the electronic fuel injection 4.9 (300) manifolds and some headers.
Engine sizes were converted to metric for 1983, causing the 300 to become the "4.9". Fuel injection and other changes in 1987 pushed output up to 165 hp (123 kW) with 8.8:1 compression. This engine was gradually phased out, ending production in 1996, and was replaced by the Essex V6 in the F-series trucks with their 1997 redesign. However, it was renowned for its durability, low end torque, and ease of service. The 300 4.9 came with the Ford C6, E4OD, ZF S5-42 and S5-47 transmissions, as well as the Mazda built M5OD 5-speed manual transmission, and the Borg-Warner T18 and New Process NP435 4-speed manual transmissions. The 4.9-liter 6-cylinder was built in the Cleveland, Ohio engine plant.
This engine is also used by Stewart and Stevenson in the MA Baggage Tow Tractor (pdf), and Harlan in their standard tow tractors [1], as well as a multitude of other pieces of equipment, such as ski lifts, power generators, wood chippers, tractors, and, until they converted to diesel engines, most UPS trucks. Many UPS trucks still use the 300 to this day.
In stationary service (generators and pumps) fueled with LPG or natural gas, this engine is known as the CSG-649.

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