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Old 09-19-2015, 04:06 PM   #29 (permalink)
gumby79
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Join Date: Dec 2014
Location: Butte, Montana
Posts: 726

little jona - '91 Dodge D 250 first gen cummins LE
Team Streamliner
90 day: 23.4 mpg (US)

Little Jona airo modded - '91 Dodge RAM 3/4 TON D 250 2×4 AUTO
Pickups
Team Cummins
90 day: 18.5 mpg (US)

The Salted Hound Jenny. - '87 Dodge Ram 50/D-50 5sp 4X4
90 day: 20.24 mpg (US)

Jona Allison aero - '91 Dodge Ram D-250 Le
90 day: 20.76 mpg (US)
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Baced on this chart of rrc. From bearys tire teck.
Using the formula he provides for wheelsize conversion as p+10 mm/-5R+1%
Eg:P175/80 r13 = P185/75 r14 out side diameter. Should be equal

P175/80R13= ~10.5RRC
P185/75R14= ~11.1. RRC
P195/70R15. NA I used P+20/-10R+1. To adjust next closest in this tire availability. As I have dune in my past life as a tire repairman@Winston Tires for 16"aswell
aswell.
P205/65R15= ~10.8RRC
P215/60R16= ~10.2RRC
THE DATA SAID:
All things the same except wheel size, the shortest. And the tallest are. Ranked1&2 for this Goodyear tire for cars not LT.

Question
On your hafe tone truck are you running LT or P (passenger car) this will make a large difference in FE?
__________________
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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