View Single Post
Old 05-14-2021, 02:19 PM   #32 (permalink)
aerohead
Master EcoModder
 
aerohead's Avatar
 
Join Date: Jan 2008
Location: Sanger,Texas,U.S.A.
Posts: 16,272
Thanks: 24,394
Thanked 7,363 Times in 4,763 Posts
impossible

Quote:
Originally Posted by AeroMcAeroFace View Post
I agree but the original post said "times are tough and it's 3.99 a gallon here" batteries would be so expensive that it wouldn't be worth it. If the poster wants american cars then the Chevrolet Volt easily gets at least 40-45mpg on the highway.

The tahoe is worth $10 000 - $15 000 according to autotempest ads in california and a base model Volt is currently for sale in california for under $10 000. Sometimes the best mod, is a car swap.

Less likely to tip over, newer, better MPG, lighter, safer in a crash. Isn't a prius, fits all the criteria Tahoe_Hybrid mentions.

https://www.cars.com/vehicledetail/d...paign=atempest



But the weight of the vehicle and rolling resistance means than 40MPG is pretty much impossible, even if aero drag was zero (obviously impossible), but even if the aero drag was zero, the maximum mpg according to the calculator is 42MPG https://ecomodder.com/forum/tool-aero-rolling-resistance.php?Weight=2500&WeightUnits=kg&CRR=.015 &Cd=0&FrontalArea=20&FrontalAreaUnits=ft^2&FuelWh= 33557&IceEfficiency=.22&DrivetrainEfficiency=.95&P arasiticOverhead=0&rho=1.225&FromToStep=5-200-5
I agree with what you say aerohead about regearing, I am just disagreeing on the practicality in this specific case.
At #25 permalink, the Tahoe, at Cd 0.37, was already achieving 40-mpg at 45-mph, with it's existing aero, mass, and tires.
I don't know what the 'target' velocity is, so I'm asking.
The Tahoe could be looking at Cd 0.10 pulling a 1-wheeled, gap-filled, full-boat-tailed, tadpole trailer, so there's some wiggle room on travel velocity.
__________________
Photobucket album: http://s1271.photobucket.com/albums/jj622/aerohead2/
  Reply With Quote