Quote:
Originally Posted by aardvarcus
Based off your numbers, it appears you are quoting figures off automobile catalogue, or a similar database, which the majority of are not measured but parametrically reverse engineered (shown as “estimated”). GM claims a measured CD of 0.45 for a generic GMT400 pickup truck, which while is not my exact configuration is the only measured CD I am aware of in open literature for a GMT400 platform. I personally trust this number more, but will agree to disagree on this point.
The transition from the GMT400 platform to the GMT800 illustrates the transition from detail optimization to shape optimization, which resulted in the loss of many very good aerodynamic details (flush wheel covers, flush/tight composite headlight to grill, flush door handles, etcetera) but overall a better tapered body shape.
There were not enough tweaks on the GMT800 platform over its 8 year run to cut the drag coefficient by over 40%, a 1999 GMT800 Silverado very closely resembles a 2007 GMT800 Silverado Classic aerodynamically. Many of the changes were for looks, not lowering drag. (e.g. use of the early 2500HD upper hood profile on later half tons).
Regardless, the stock drag coefficient will mean little after I cut and taper the rear of the vehicle.
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it's incorrect an average 1995 chevy suburban 5.7l gets 10-11mpg
that is why it has a 42 gallon tank
about as great as a hummer H2 6.0l 4 speed the H2 is 0.57..
Tahoe hybrid is 0.34 gets 25mpg on the highway(round trip) on 100% ICE 6.0L 4 speed auto (with Super gear OD)
1050rpm at 45mph
48MPG on the downhill side and 15mpg on the uphill side is the best I ever done
i can't shake the 15mpg on the uphill side no matter what since its mostly in v8 mode
if I was able to get 20 or 25 on the uphill side i could get about 34~36.5mpg
there is other route i had not taken yet but it's going to be closed tell next spring(due to fire and winter) it's all down hill so i might be able to stay in EV mode for the 28 miles on the down hill side the speed limit is only 25-35 or so i would be able to stay at 29mph .... and stay in EV mode (would have to use the A/C to prevent the battery from overcharging)