Quote:
Originally Posted by aerohead
On three occasions I've seen 39.9 mpg @ 60-mph,steady,interstate cruising,Texas to California and back .That's with 4,220-lbs all up weight, around 29-sq-ft frontal area,Cd 0.2675,and REGULAR UNLEADED.With a direct-injection turbo-diesel we'd be looking at 51.87 mpg at the same velocity.
The Tahoe is heavier and of larger frontal area.Your V-engine has higher internal friction.Your drive-line has higher internal friction.
In materials,$200 is quite reasonable,but you might be looking at 800-1200 man-hours in fabrication time to create a low enough drag,requiring the most difficult to achieve compound curves,everywhere.
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It has very aggressive DFCO. That is how i'm able to get that many mpg in the first place..
I suspect the Electrical motor is spinning the engine in DFCO... with a OBD reader you can see 0.00v on the upstream o2 sensor. that mean no fuel to air ratio.
when i first saw that i thought my sensor was broken or some other issue..
since there is no "engine braking"
it feels like it's in "neutral gear"
if I shift it into Manual Mode it has "engine braking" and you stop pretty quickly