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re: Why isn't fuel economy getting better? *Spinoff from Ecoboost thread*

Posted on 3/11/13 at 1:25 pm to
Posted by treble hook
Member since Nov 2011
2310 posts
Posted on 3/11/13 at 1:25 pm to
quote:

Impressive and far better than 10-15 years ago.
quote:

My 7700# truck

So is it weight that is the issue? Then why are trucks getting heavier?
Posted by Hammertime
Will trade dowsing rod for titties
Member since Jan 2012
43030 posts
Posted on 3/11/13 at 1:28 pm to
Weight must increase with the increase in towing capacity. If you tow a 20k 5th wheel with a Tacoma, you would know that. The only brakes that do anything are the trailer brakes. You basically ride the trailer, the trailer doesn't ride the truck
Posted by VetteGuy
Member since Feb 2008
28622 posts
Posted on 3/11/13 at 1:29 pm to
Yes, weight and size.

Another thing, too is that until recently, light trucks were excluded from CAFE.
Thus automakers didn't worry about them as much.

In 2006, reforms to the CAFE standards for light trucks were adopted, and took effect in 2011. During a transition period from 2008-2010, manufacturers had the choice of complying either with the unreformed CAFE standards or with the reformed CAFE rules. Under reformed CAFE, each manufacturer's required level of CAFE was based on target levels set according to vehicle size. The targets were assigned according to a vehicle's footprint: the product of the average track width (the distance between the centerline of the tires) and wheelbase (the distance between the centers of the axles). Each vehicle footprint value was assigned a target specific to that footprint value. Compliance was determined by comparing a manufacturer’s fleet average fuel economy in a model year with a required fuel economy level calculated using the manufacturer's actual production levels and the category targets.
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