Quote:
Originally Posted by racprops
OK using just aerodynamics how much MPG can you get with a:
Say 2003 Ford Crown Vic,
A 1995/2005 Ford/Chevy full size Van.
Or any car, how much MPG with just adding aerodynamics can you get, in this case, I saw a write up showing how much each of these things gave:
as in removing side mirrors,
windshield wipers,
door handles,
rain gutters,
roof racks,
then adding under belly pan,
rear wheel fender skirts,
if possible front fender skirts if not then large disk like wheel covers,
and lastly Boat Tails.
I remember all that was only worth around a gain of 5MPG.
Rich
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Spirit went from 26.4 mpg @ 65-mph, to 39.9 mpg on three different road trips.
Toyota published Cd 0.44 for the truck.
At DARKO, in 2014, she measured Cd 0.2675.
At A2 Wind Tunnel, it is likely that Cd 0.2440 would have been registered.
With the full suite of modifications, as tested by 2017, as a BEV, Spirit, at A2 Wind Tunnel, might exhibit a Cd as low as 0.168.
OEM top speed was 96-mph.
At Bonneville, SPIRIT ran 105-mph in the mile ( not a top speed ).
In 2008, SPIRIT trailed a Homeland Security Chevy Tahoe, @ 108-mph, on the interstate in Arizona ( not a top speed ).
One 'calculator' for an SCTA Bonneville racing team predicted a 128-mph top speed for Spirit.
Just for changing the shape.
We definitely ought to take vehicles on a case-specific basis.