OK, you’ve done nearly everything economically possible to your 7.3L Super Duty or Excursion. You’ve upgraded the intake and exhaust, added a programmer, and possibly even upsized the injectors. Sure the truck runs better, but you’ve noticed that the EGTs are starting to climb into the danger zone at wide-open throttle or when towing a heavy trailer up a grade. The missing element in your power recipe is more air. While the stock Garrett turbo functions well on a stock truck, it can’t keep up with the added heat that more fuel creates.
Posts Tagged ‘project box hauler’
Project Box Puller
Keeping Track of Vitals
For our regular readers, Project Box Hauler needs no introduction. For those who have just joined us, here’s the Cliff Notes version of the series. We got our hands on an ’01 Ford F-350 dually that spent its previous life as a Castrol Racing show car hauler for John Force Racing. The truck, fitted with a well-worn 7.3L Power Stroke, was showing 200,000-plus miles on the odometer and was in serious need of attention. The buyer got the fifth-wheel trailer with the deal, hence the name Project Box Hauler.
The Great Cover Up
One of the keys to keeping a differential alive is keeping it cool. Utilizing synthetic rear end gear oil helps, but nothing beats addition fluid capacity from an aftermarket rear end cover, which replaces the shallow, stamped steel factory unit. Ford Super Duty diesels are notorious for having factory diff covers with blistered paint on them, which indicates things inside are getting pretty hot.
For those of you who have been following our Project Box Hauler series, you’ll remember our high-miler, ’01 Ford F-350 dually with 200,000-plus miles on it, was diagnosed with a couple of dead cylinders, more specifically No. 3 and No. 8. Upon his initial diagnosis, Nate Brekken at Strictly Diesel in Scottsdale, Ariz., guessed the problem would more than likely be bad injectors on those cylinders since injectors get fairly tired and worn out on the 7.3s after about 150,000 miles. On the other hand, two dead holes could mean more serious issues, such as bad valves or poor compression from worn-out piston rings, or even a cracked cylinder head.
Glow & Go
Installing New Glow Plugs Will Fix Cold Start Woes
Since diesels are compression-ignition engines, meaning there are no spark plugs to start the combustion process, nearly every diesel is equipped with some sort of glow plug system to get the fire started in cold weather. The little “Wait to Start” light that comes on usually indicates that the factory glow plug system is activated as part of the cold start circuit. Today’s computer-controlled engines have taken the glow plug system engagement to an all-new level, taking into account the various engine parameters as to when the glow plugs will be activated or not.
EZ Clutch Upgrade for Project Box Hauler
Anyone who has ever owned a manual transmission vehicle knows how important the clutch is. It is the vital connection between the engine and the driveline, and is responsible for turning the engine’s torque and horsepower into usable forward motion. When things are right, the clutch assembly provides easy gear changes and plenty of clamping force for day-to-day driving and towing.
Hushpower Turbo-Back Exhaust
Another area the stock 7.3L falls short in is the factory exhaust system. The 3-inch system is necked down just past the turbo outlet and continues on a kinky path to a chambered muffler, which robs even more performance. So improving on things is fairly easy with a quality turbo-back system since there’s now catalytic converter on this truck.
Project Box Hauler
Part II: Bellows Style Up-Pipe Upgrade
Last month, we introduced our latest project truck, a well-worn, 200,000-plus–mile Ford F-350 fitted with the 7.3L Power Stroke and a six-speed manual transmission. The owner found this dually while scanning the classifieds where it was listed for sale with a 28-foot gooseneck trailer. The combo used to be a Castrol Racing/John Force car hauler that racked up 215,000 miles in regular cross-country jaunts.