How does 7.3 turbo work

The complete upgrade took about seven and a half hours, including slow-downs for our photography and lunch.

Vozar started by removing the air filter, turbo inlet tubing, intercooler boost tubes and intake manifold to access the turbo and pedestal.

With the exhaust inlet and outlet disconnected, Vozar removed the turbocharger and its pedestal, since a pedestal designed to work without the EPV would replace the latter. With the turbo on the workbench, Vozar removed the compressor housing and replaced the factory cast wheel with a machined billet Wicked Wheel2 from Dieselsite, which forms the heart of this upgrade. The fully balanced Wicked Wheel2 is lighter than the factory cast wheel, which allows for faster spooling. This design allows it to grab and compress more air on each revolution.

With the compressor side of the turbo buttoned up, Vozar flipped it over to remove the outlet flange and delete the EBV flapper. Because the shaft and flapper are positioned in the middle of the exhaust flow, they impede that flow slightly even when open.

In a worst-case scenario, the valve can stick in a partially or fully closed position, resulting in excess backpressure and poor engine performance. To remove the assembly, Vozar ground away the rivets holding the flapper and then slid the shaft out of the outlet flange. He then used a welder to seal the hole from the shaft before cleaning the mounting surfaces and reinstalling the outlet on the turbo.

Before the upgraded turbo could be reinstalled, Vozar had to address the leaking up-pipes and collector. With the bolts gone, the up-pipes came out of the truck with almost no effort, even though both were still bolted to their respective collectors.

Inspection showed that the donut gaskets had completely failed, allowing serious exhaust leaks. With the proper fueling in place, this turbo will support hp yet still give cool EGTs and quick throttle response. If you want to go nuts with power and shoot for or more, an S style of turbocharger 71mm or larger has always been the go-to, and in order to install one on a 7. Irate Diesel makes a great bolt-on solution for those wanting to make the switch with their 7.

This will allow you to run either an S or turbo, and it will come with everything needed to mount the turbo of your choice. For great street manners, an S works great, or for high RPM sled pull action, an S or larger can be used. Just be sure to size your turbo accordingly and match the airflow potential with the fuel capacity of your injectors. The first number is a volume rating in CC which indicates how much fuel volume the plunger cavity will displace over 1, shots, and the second number represents how much larger in percent the nozzle is over stock.

These bad boys will flow enough fuel for rwhp but are also a hybrid design which means they use a larger 7. This will build up inside the injectors and can cause poor performance and even premature injector failure, since the residue can cause the moving parts to stick.

To prevent all this from happening, its necessary to alter the one-way design and make a path to allow the fuel to constantly circulate through the cylinder head and return to the tank, keeping the fuel cooler, preventing buildup from occurring, and eliminating air pockets. This is where a Regulated Return fuel system comes into play. This kit from Driven Diesel will eliminate the stock fuel filter bowl on top of the engine, and comes with an adjustable regulator and all the hoses and fittings needed to make the conversion, and is a great investment which will protect your stock or aftermarket high-flow injectors.

Both of those issues can be solved with a Fuel Air Separation System. This splits the oil demand between two pumps, which increases performance potential and reliability all at the same time, and it enables you to run the largest injectors with no loss of injection control pressure. In , new 7. Power levels remained the same this year. The 2,,th 7.

This is a testament to the 7. Stricter emissions standards resulted in a need for lower emissions and competing manufacturers were designing trucks with similar or better performance capabilities. Peak 7. Want to see all Powerstroke towing capacities?

Visit our Powerstroke Tow Capacity guide. Ever seen the term OBS used? OBS means old body style. Ford Superduty trucks with a model year before feature this old body styling. Therefore, if you see someone referring to an OBS Powerstroke they are referring to trucks from this time period. In , trucks equipped with the 7. This makes it hard to identify late model 7. This body style was kept until , when Ford also replaced the 6. New body style 7.

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Founder of Diesel Resource and a complete diesel head. Has a little bit of problem buying too many trucks. Learn more about him by checking out his truck. Help Us Get to 1,! Written by Kamil January 3rd, Ford 7. OBS 7. Alliant Power 7. Injector Code AB Performance is increased to horsepower and lb-ft of torque.

While that kind of power matched or beat what Dodge and GM were offering at the time, you were still looking at mph times of 14 seconds empty.

Robust, iron parts, conservative power and low engine speed are the key ingredients for any diesel engine lasting forever—and if a 7. A big reason why the 7. Aside from the use of a catalytic converter down stream in the exhaust system, the 7.

By comparison, the exhaust gas recirculation EGR system that had to be employed on its successor, the 6. Though a bit labyrinthine, the oil-activated fuel injection system used on the 7.

The HEUI system short for hydraulically actuated, electronically controlled, unit injector on the 7. From there, the pressurized oil acts on an intensifier piston, compressing the fuel below it and resulting in injection pressures as high as 21, psi in-cylinder. CAT would also make use of HEUI technology on several of its own engines some of which were the , C7 and C9 , all of which saw good success in terms of durability. The HEUI injectors used in the 7.

Even when split-shot injectors were introduced on the 7. Properly maintained 7. Even though early 7.