Also I have refrained from some simpler mods. Moonies , finder, skirts, and not so simple mods ,belie pan, side skirts ,bumper rellocation/redesine entire front end to be more like a vw bug instead of a stack of bricks ,air dam, hood angle, rain gutter delete ect Ect ...
Why most would ask ?
Disbelief. I was expecting a 10-15% improvement and surprised myself with 20%+,haveing stumbled across some thing that would need better proof than simple manipulateable MPG
so what test will be expected as un irrefutable proof and not a gusstament 100%macanical diesel no computer or OBD 2
One major differentance that may have yealded the above average results is the8" past the tailgate. A cap crossed with a camback. A design aspect not seen on other caps . This is affecting the trailing air as well, not just top/sides. This feature I've noticed being implemented on '14 and up full size pick up trucks accrost the top of the tailgate. Also on mini vans, and cars .
How much can this bump help ? And will it work with other cars/trucks as mod?
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1st gen cummins 91.5 dodge d250 ,HX35W/12/6 QSV
ehxsost manafulld wrap, Aero Tonto
best tank: distance 649gps mi 24.04 mpg 27.011usg
Best mpg :
31.32mpg 100mi 3.193 USG 5/2/20
Former
'83 GMC S-15 Jimmy 2door 2wd O/D auto 3.73R&P
'79 Chevy K20 4X4 350ci 400hp msd custom th400 /np205. 7.5-new 14mpg modded befor modding was a thing
87' Hyundai Excel
83 ranger w/87 2.9 L FI2wd auto 18mpg on the floor
04 Mitsubishi Gallant 2.4L auto 26mpg
06 Subaru Forrester XT(WRX PACKAGE) MT AWD Turbocharged 18 plying dirty best of 26mpg@70mph
95Chevy Blazer 4x4 auto 14-18mpg
04 Chevy Blazer 4x4 auto 16-22mpg