6.5L DIESEL PERFORMANCE UPGRADES

I just purchased a 1998 Chevy K2500 equipped with a 6.5L turbo diesel. I really don't want to do any work inside the engine, so what are the best performance add-ons for this truck? It currently has a straight exhaust and the fuel injection pump’s PMD (Pump Mounted Driver) module has been moved to a remote mount beneath the front bumper to allow it to run cooler. The truck has 175k miles on it, and this is my first diesel truck. Thanks,

Chris Olmstead Via Email

Hi Chris, Suggestions for performance improvements sort of depends on what sort of performance increase you're looking for. Knowing how you use the truck now and how that could change in the future would also be helpful. Step 1- In general, installing a boost pressure gauge and exhaust temperature gauge should be the first steps in any performance improvement program. Step 2- The next step involves installing a 3-1/2" mandrel-bent free-flowing exhaust system. Step 3- Make sure your engine-driven fan-clutch is engaging whenever the engine coolant temperature reaches 210. You should be able to hear the engine fan “roar” stoplight to stoplight on a hot summer day or anytime you’re towing a heavy trailer up a steep grade. Step 4- For an otherwise stock engine, I’d consider replacing the stock turbocharger with a Holset HX-35W. This Holset was used on the 1997-2002 Dodge Cummins. Then add an engine programming upgrade that adapts to the new turbo, while adding a bump in fuel rate. This combo will provide for a healthy improvement in performance. Just don’t forget the boost pressure and exhaust temperature gauges. Once you’ve added performance products, the nut behind the wheel is what helps protect the engine, plus the gauges will help you improve powertrain management for best performance (determine what gear/rpm/boost/ etc.) work best when pulling hills). Good luck,