GM Announces Performance Specs and Pricing for 2014 K2XX Trucks

[big hammer]

Originally Posted by fielderLS3

You really dislike like AFM don't you. This V8 beats TTV6 efficiency with cylinder de-activation. Without, I bet it would still match it. For the record, I'm only against turbos in cases when they provide no performance or efficiency advantage for the extra cost and complexity. I'm not against turbos in cases when they provide significant performance and/or efficiency benefits that justify their cost. In fact, family members have bought 2 turbo cars in the last year based on my recommendations.

Low 11s? Could you elaborate?

Stock vs. modded is a pointless comparison. Anything will run anything if cost and durability are no object. Since you asked, my GT gets around 29-30 MPG on the highway consistently as long as I use ethanol-free gas. My best tank last summer broke 31.

turbos and effeciencies are a funny animal. there are volumetric efficiencies and fuel efficiencies.

while turbos (or superchargers) add power, they are also parasitic. they take power to operate, and power in this case is fuel.

in many cases, like the ecoboost, volumetric efficiencies go up but fuel efficiencies go down.