[aerohead]

During the 20-hours I spent on the Charger Daytona pop-up trailer, I discovered a rabbit-hole in CAR and DRIVER's original reporting.Had they reported 'gear-limited' top speed,I could have saved over two days,chasing my own tail.None of the numbers jived,as I was under the impression that their data reflected a drag-limited top speed.It's makes all the difference in the world!
Having solved the C&D mystery,working through BZP's Dark Aero was a relative breeze.25-lines of calculations,to solve for 17-parameter solutions.Here's the rundown:
*All performance is for 65-mph,with the A/C 'on.'
*Naked,from the factory,Bam's T-100 was good for 19-mpg,at Cd 0.44,and approx. 29-sq-ft projected frontal area,and CdA 12.76 sq-ft,and approx. 3,800-pounds test weight,Crr 0.012325,and BSFC 0.5745 lb/bhp-hour,1725.1 Wh/mi,and 496-miles range,with a 786.65 kWh-e 'pack' (24-gallons)
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*with grille-block
*extended airdam
*flush,extended rocker panel extensions
*full,rear wheel skirts
*full,articulated belly pan
*diffuser
*above-beltline, cab-to bed, gap-seal
*and aero-shell
Bam's T-100 drops to Cd 0.277,for CdA 8.033 sq-ft,and 24.93-mpg,@ 4,100-pounds.
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*With Dark Aero behind the T-100,the T-100's drag falls to Cd 0.2354,for CdA 6.828 sq-ft.
*Dark Aero,Cd 0.3733,solo in the wind tunnel,drops to (-)0.1247,@ 18.7 sq-ft frontal area,for CdA (-) 2.3319 sq-ft,trailing behind the T-100
*The composite drag coefficient for the tow/towed combination is Cd 0.155,@ 29.0 sq-ft (based on the T-100),for CdA 4.495 sq-ft,L/H-4.317,L/h-4.881,at 288-inches total length.
*At CdA 4.495 sq-ft,the combination returns 31 mpg,REGULAR UNLEADED
*35.65 mpg,with MAZDA SkyActiv gasoline direct-injection,turbo engine
*40.3 mpg,with AUDI,TDI engine
*130 mpg-e,with Tesla electric drive,@ 252.1 Wh/mi,and 396-miles range,on a P100D battery pack (3.0509-gallons E10)
*top speed improves,from 96 mph,to 116-mph.
*The Toyota V-6 engine recognizes a T-100 with an 'apparent' 10.215 sq-ft frontal area,about 1/3rd the truck's original size
*As a complete system,Bam's mods add negative 0.285 to the pickup truck.
*By adding 1,350-pounds BZP picks up 12-mpg
*By adding 1,350-pounds BZP gains 20-mph
*By adding 1,350-pounds BZP gains many additional cubic-feet of,weather-tight cargo capacity
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An unknown quantity remains the V-6's BSFC as the engine load transitions.HOT ROD Magazine recognized a variability in BSFC for a small-block Chevrolet,350-CID,V-8,from 0.49-lbs/bhp-hr,to 0.71-lbs/bhp-hr,depending on load.The ICE is 'island-hopping',all over its map.
And Hucho warns us,via General Motors Research Labs,that unless we properly gear-match after drag reduction,we can lose up to around 30% of the streamlining benefit.Not so if electric powered.The Tesla BSFC-e basically remains right at 0.137 lbs/bhp-hr
I've seen as high as 39.9 mpg @ 100 km/h on three occasions,on REGULAR gas.My 4-cylinder probably has less internal friction than the V-6.A lot of money would tell.