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.
Archive for August, 2010
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.