- Installing ppe fuel pump duramax install#
- Installing ppe fuel pump duramax upgrade#
- Installing ppe fuel pump duramax full#
- Installing ppe fuel pump duramax mods#
Installing ppe fuel pump duramax upgrade#
This affordable upgrade ditches the OEM fuel-pressure relief valve for a solid unit that keeps 100 percent of the fuel in the rail rather than bleeding back off into the tank.Ĭommon-rail diesels like the Duramax have sky-high fuel pressures north of 20,000psi, and under a heavy load, the factory fuel pressure relief valves are notorious for opening and bleeding off extra fuel-rail pressure back into the system, costing serious power and often times putting the truck into “limp mode.” If that’s not bad enough, once the OEM fuel-pressure relief valves give way, the more often they’ll bleed off pressure until check-engine lights for insufficient fuel pressure become the norm.īut PPE was smart enough to create the fix in the form of the Race Fuel Valve, a simple device made from heat-treated stainless steel that replaces the stock or shimmed pressure relief valve with a solid unit.
Installing ppe fuel pump duramax install#
Master tech Ethan Barker of Left Coast Diesel helped us install the trio of affordable Duramax fueling modifications that made significant improvements in acceleration on our test truck, especially out of hole. Here’s how we fixed our starving Duramax in three easy mods.
Installing ppe fuel pump duramax mods#
With the powerful but effective fueling mods in hand, we paid a visit to the diesel specialists at Left Coast Diesel in Livermore, California, where master tech Ethan Barker not only installed the trio of PPE mods, but he went so far as to explain in-depth how each part worked so we’d have a solid understanding of how and why each part gained power. The truck was a great performer, but when loaded with his toy hauler, the truck would run out of steam on the steepest of hills.Ī quick call to the Duramax gurus at PPE unearthed some simple and affordable fueling mods that were aimed at not only increasing fuel pressure, but also maintaining it under long, heavy-throttle pulls where the stock system simply runs out of fuel.
Installing ppe fuel pump duramax full#
Take for example, Matt Kutchera and his LLY-equipped 2005 Chevrolet Silverado 2500 that was previously modified with a mild lift, upgraded rims and go-fast bolt-ons like a cold air intake, full exhaust and a combination of PPE and Edge tuning components. This isn’t to say they’re not worthwhile modifications on a stock truck, but the return on investment will be much larger with a truck already outfitted with a tuner, intake and exhaust upgrades that are already asking too much of the factory fuel system. Thankfully, Pacific Performance Engineering (PPE) engineered some affordable fueling upgrades that do wonders for modified trucks. But as soon as diesel enthusiasts started wicking them up, it was immediately apparent that the factory fuel feed lines, pressure relief valve and CP3 just couldn’t handle the load of a heavily juiced-up tuner. “In stock form, the truck had 2.5psi of vacuum, but with the pump in place we had 8psi of positive pressure-how’s that for big gains?”Īgain, this isn’t to say that the Duramax is an improperly designed motor, because they really are great performers out of the box.
However, not long ago, the sentiment that more is better came back to bite some Duramax fans when they realized that nudging horsepower past the 400-hp mark produced diminishing returns, not because the almighty GM mill wasn’t capable, but because it was being choked from fuel for a few simple shortcomings. So naturally, the more fuel trucks receive, the better. Prior to our PPE fuel upgrades, the rig had full exhaust, a cold air intake and a combination of PPE and Edge tuning products.Īs with any diesel engine, more air and more fuel means more power. Matt Kutchera’s LLY-equipped 2005 Silverado 2500 LTZ is fully loaded, has ridiculously low mileage and is as clean as they come.
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