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Well got to do some fact gathering yesterday
Ran my normal Helena to Anaconda Montana 100mi south leg test run got 23.18mpg . about 1.5 below average. 500lbs ballast stacked accrost the tail gate .(3200lbs front 3500lbs rear, 100lbs transfer off the front) on winter studded snow tires @65psi on all 4 corners. Aero Tonto on.
It was cold 7f above to start -2 at finish
80% grill block in place.
AIT mesured with a k type thermocouple in the intake horn(manifold , post turbo and Intercooler)
IAT was a max of 40°f on long grades
Average 20° f
Costing in neutral at up to 85mph 15°f
20-30° above ambant air temperature
Parked for 3hrs ,then headed home33mile drive at -10°f .
32° max
19°average
For reference
Coolent temperature is 155°f @30° ambant with no grill block..
175° @30°f ambant with 80% blocked
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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
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