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Diesel Tech Talk - Q&A - Article Knowledge Base

OC DIESEL Tech Talk - Learn from the Diesel Performance Part Experts with pull-no-punches Product Reviews and Installations. Get Free Expert Advice on Ford, Dodge and GM Diesel Trucks directly from our Lead Techs

This is a new segment for OC DIESEL where we get to share our years of experience on installations and common diesel truck issues, along with product reviews from the hottest diesel performance product brands. We're also creating a place where YOU, our valued visitor to OCDiesel.com, can get FREE advice by asking questions concerning diesel trucks, diesel part installations and the best diesel performance product(s) for you're diesel truck.

Dodge Cummins

Ford Powerstroke

GM Duramax

6.7L Ford Powerstroke Diesel Engine Specifications

The following article will outline the basic engine horsepower and torque specifications for the 6.7L Ford Power Stroke. Just like its immediate ancestor it too is engineered with a twin turbo induction system and high pressure fuel injection pump system. The high pressure oil pump system was no longer used beyond the 2007 6.0L Powerstroke model year. The fuel delivery system was superseded to the traditional fuel injection pump system, same location, similar function, but different allocation and use of fuel, oil, and pressure.

The 6.7L Powerstroke engine meets all emissions standards that have been set forth by the government meanwhile accomplishing high diesel horsepower and torque ratings.

6.7L Ford Powerstroke Engine Features
  • High Pressure Common Rail Fuel System
  • Dualboost Turbocharger System
  • 4 Valves per Cylinder
  • Selective Catalyst Reduction (SCR) System

The engine block is made from compacted graphite iron (CGI) with 6 bolts per main bearing cap and the cylinder heads are made from aluminum with 6 bolts per cylinder. The engine was nicknamed the “Scorpion” due to its appearance with the intake/exhaust arrangement and turbocharger mounting location in a twisted-like wraparound. The DualBoost variable geometry single sequential wastegated turbocharger (dual compressor housings, single exhaust housing), features a variable geometry turbine housing allowing more exhaust gases to spool the volume of charged air into the induction side of combustion for a more efficient running engine. The charge air cooler (CAC) or commonly known as an intercooler is air to water cooled. The fuel injection system is direct injection with a 30,000 PSI high pressure common rail utilizing 19mm Piezo actuated injectors with 8-hole injector nozzles and a Bosch CP4.2 high pressure fuel injection pump.

The engine oil type required for use to insure emission system compatibility is CJ-4 or CJ-4/sm engine oil. Ford Motor Company suggests the following use of engine oil weights. For normal use, 10W-30 engine oil is the preferred motor oil viscosity. For severe duty and biodiesel applications 5W-40 or 15W-40 engine oil is recommended. Biodiesel Applications Viscosity recommendations vary with ambient temperature.

The traditional emissions system allows cooling of the hot exhaust gases to cool before the EGR (exhaust gas recirculation) flow is managed. The 6.7L Powerstroke is distinctively different in that the EGR flow is controlled by the EGR valve before entering the EGR cooler. Where the 6.0L Powerstroke is notoriously known for coking deposit build up in the intake manifold system, this new way of cooling the hot recirculating exhaust gases prior to entering the EGR cooler reduces the sludge and soot allowing for better performance and may prolong needed repairs and maintenance.

Pickup truck dyno

The dyno chart for the pick up exhibits a steady up climb slope to a peak rating of 390 horsepower at 2800 RPM then drops strongly at 3400 RPM, whereas the peak torque of 735 lb-ft begins at 1600 RPM and remains steady up to 2800 RPM then quickly descends along with the horsepower lineage.

Pickup truck dyno2

The engine equipped in the Chassis Cab contributes less power than the pick up. It exhibits a more round-like horsepower high curve is 300 horsepower at 2800 RPM. The torque lineage high is 660 lb-ft at 1600 RPM and slowly descends to about 3200 RPM then quickly drops thereafter.

When identifying the cylinders of the 6.7L Powerstroke, they are numbered from the vehicles front perspective looking back. Therefore, if standing at the front of the vehicle, the right sides (driver side) are cylinders 1, 2, 3, and 4 and the left sides (passenger side) are cylinders 5, 6, 7, and 8. Below are the factory engine specifications for a 6.7L Powerstroke.

Pickup truck dyno 3