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Owner: OBD-III
Jay-Jay: 2001 GMC Sierra 2500HD 4x4
Displacement: 8.1 L
Fuel type: gasoline
Transmission: automatic
Curb weight: 7855 lbs
Coefficient of drag: 0
Frontal area: 0 sq.ft.
Instrumentation: factory installed
Description: I'm a Building Contractor.
This is my work truck...

It tows, hauls, plows, totes tools, carries lumber, and never complains.

It is a very lively beast. At 496ci, this vortec is one of the largest gasoline-powered big blocks commissioned for a production pick-up.

Factory power at the crankshaft is around 340hp and 450ft/lbs torque. Which when dyno'd came out to about 230hp and 310ft/lbs to the wheels.

Mated to the engine is one of the best automatic transmissions I've ever encountered. The Allison 1000 5sp.

As if that wasn't enough I went ahead and souped it up.
-High torque camshaft
-1.7 stainless roller rockers
-Hydraulic roller lifters
-Mild headwork and valve job
-Custom higher flowing intake manifold
-Cold air intake
-1 7/8" Short-tube headers
-3" Downpipes
-4" custom straight piped exhaust
-Low temp t-stat (165 deg)
-Melling high flow oil pump
-PCV re-route
-EGR Delete
-Custom Dyno tuned for 93 octane

Modified power output is now 347hp and 440ft/lbs torque AT THE WHEELS!

Very exciting to drive. Yet very thirsty....
The very best FE my land yacht ever got was 12mpg highway. That didn't last long due to the rebuild. I now see 10mpg EVERYWHERE. No getting around it.
Build Thread:
Current Mods: Leaving it in the driveway!

Planned Mods: None.
Official Fuel Economy Ratings
EPA city 9 mpg(US)
EPA highway 10 mpg(US)
EPA combined 9.5 mpg(US)

Actual Fuel Economy Performance
Lifetime 0 mpg(US)
Last 3 tanks 0 mpg(US)
90 days No data entered

(Created: 2016-06-02 18:17:33 / Modified: 2016-06-02 18:17:33)


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