6.4L Power Stroke
The need for an even cleaner burning diesel engine led to the creation of the 6.4 liter Power Stroke. The 6.4L is the quieter & cleaner than its predecessors. This is also the first engine in the light duty diesel market to utilize twin turbochargers, which provide quick spooling on acceleration and more than enough air flow to maintain performance in the upper rpm range. Though the emissions equipment hinders this Power Stroke's fuel economy, the engine has proven itself in strength and reliability.
6.4L Power Stroke Specifications:
Years Produced: |
2008 - 2010 model years |
Displacement: |
390 cubic inches, 6.4 liters |
Configuration: |
V-8 |
Compression Ratio: |
17.5:1 |
Bore: |
3.87 inches |
Stroke: |
4.134 inches |
Injection: |
Direct injection, high pressure common rail injection system |
Aspiration: |
Twin sequential turbochargers |
Valvetrain: |
- OHV, 4 valves per cylinder |
Oil Capacity: |
15 quarts |
Weight: |
approx. 1,130 w/ oil |
Horsepower (peak)*: |
350 HP @ 3,000 RPM |
Torque (peak)*: |
650 lb-ft @ 2,000 RPM |
*peak refers to the highest rating given to the engine during its production.
6.4L Powerstroke Info:
• The 6.4 Liter Power Stroke is similar to the International Maxxforce 7. The Maxxforce 7 is essentially the same engine as the 6.4L Power Stroke, but the "Power Stroke" name is only designated when the engine is used in Ford trucks. Power output and maximum RPM are the only significant differences between the engines.
• The 6.4 liter Power Stroke is the first of its breed to feature twin turbochargers, giving the 6.4 quick throttle response & plenty of airflow in the higher RPMs.
• The 6.4 liter Power Stroke is the cleanest and most powerful Power Stroke produced, featuring advanced emissions controls and peaking at 350 hp & 650 lb-ft of torque.
• International suggests that the 6.4 liter will prove to be the most durable Power Stroke ever produced.
• Due to the emissions controls, specifically the active regeneration mode (when the engine RPM is increased & fuel is injected into the exhaust system to burn off excess soot in the particulate filter), the 6.4L suffers from poor fuel mileage when compared to the previous 6.0L Power Stroke.
• The 6.4L requires the use of ULSD only. High sulfur diesel fuels (greater than 500 ppm sulfur) can damage the EGR & diesel particulate filter by causing corrosion.
6.4L Power Stroke HP/Torque Graph:
6.4L Power Stroke Flaming Exhaust:
Ford safety recall 07S49: Applies to trucks built before 3/9/2007, addresses concerns of flaming exhaust due to excessive exhaust heat during regeneration on the 6.4L Power Stroke. Updates engine calibration solves this issue as well as many other DPF/active regeneration related concerns by altering the active regeneration schedule.
Very few trucks were affected, although a video made viral on the internet that featured a 6.4L with flames shooting out of the exhaust made the issue seem common. Many suspect the owner of the truck in the video altered the truck to create the flames.
Owners should not be concerned, the recall was small and all trucks have the updated calibration, which permanently prevents the problem.
While the 6.4L Power Stroke production run only lasted a few years, International's medium duty engine proved to be a pace setter in the light duty truck market. International's decision to utilize twin turbochargers and finally turn to common rail injection technology helped the 6.4L Power Stroke stay competitive with GM's & Dodge's offerings. The greatest complaint that the 6.4L received was fuel economy. The addition of the diesel particulate filter & active regeneration system hindered the city fuel mileage (stop & go) of these trucks, though an unloaded truck could still provide decent mileage on the highway.
6.4L Power Stroke Diesel
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