Savana 3500 V8-6.6L DSL Turbo VIN 6 (2007)
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A Tech 2(R) will not positively enable you to identify the use of a power-up device.
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Some companies that offer power-up devices claim increases of 150 or more horsepower and 300 or more lb/ft pounds of torque.
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A vehicle that is used to the power-up device potential 100% of the time will see earlier engine wear and breakdown.
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A vehicle that takes advantage of additional power, but on a less frequent basis, may not see premature engine wear and breakdown until later in
the engine's life.
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A vehicle not pushed to its limits of the power-up device often may not encounter premature wear and breakdown until after the engine is out of
warranty.
Duramax(TM) Powertrain Horsepower / Torque Ratings
The following horsepower and torque increase over the past years required new internal components to accommodate the increase.
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LB7 - 300 hp with 520 ft/lb of torque for model years 2000-2004
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LLY - 310 hp with 605 ft/lb of torque for model years 2004-2008
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LBZ - 360 hp with 650 ft/lb of torque for model year 2006-2008
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LMM - 365 hp with 660 ft/lb of torque for model year 2007-2009
LBZ Improvements
To reliably achieve an increase in 50 horsepower with 45 ft/lb torque, the Duramax (TM) diesel had to be revised in many areas. A few of the revisions
on the 2006 LBZ were:
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New pistons with a revised compression ratio.
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Wrist pins that are larger in diameter.
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Connecting rods with added material to increase the I section strength.
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Engine block and machining changes
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Cylinder heads
Duramax(TM) Life Expectancy
The Duramax(TM) 6.6L V8 Turbo Diesel Engine is sold with a warranty of 100,000 miles/160,000 kilometers. The Duramax(TM) has been tested to
survive upwards of 200,000 miles/320,000 kilometers. The Duramax(TM) powertrain is designed for reliability, peak horsepower and torque within its
design limits. When a customer installs a power-up device, it drastically reduces the mileage ratings.
Important
Cylinder Wall Spotting (commonly referred to leopard spots) is from the induction hardening process of the top 1/3 of the cylinder wall. This is
normal for the Duramax (TM) Diesel.
Identifying Fuel Related Aftermarket Power-Up Devices
Aftermarket companies have developed a performance pressure relief fuel valve for Duramax(TM) diesel engines. Refer to above graphic illustration.
The performance pressure relief fuel valve attaches to the fuel rail in place of the OEM valve and will not allow any fuel return to the tank, giving 100%
of the fuel to be available for additional engine performance. This may cause additional fuel related driveability concerns and may set the following
DTCs:
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DTC P1093 Fuel Rail Pressure (FRP) Low During Power Enrichment
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DTC P0087 Fuel Rail Pressure (FRP) Too Low
