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Old 11-11-2017, 05:10 PM   #4 (permalink)
gumby79
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Join Date: Dec 2014
Location: Butte, Montana
Posts: 665

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 24 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: 20.77 mpg (US)
Thanks: 197
Thanked 370 Times in 240 Posts
Ive been on the horn with Jim Dunn , the Truck and pickup class rules chairman ,to iorn out the details of, What calss.

For all truck classes except UDT and DS say, flat tonto cover that yeald no aero advantage are allowed ,but must not extend above the top of the bed.
Theas are the 3 classes we came up with . He said that the 14500lbs min weight for the Mdt and udt classes is a missomer and that I wouldn't be held by that, only limitis 750cid If this changes the only class I fit with my Aero Tonto will be T, time.
There is 1 more class that would alow our caps and that is DS Diesel streemliner @306.816 except "modified production bodies are forbidden " so maby shrink wraping it bumper to bumper may qualify .

87.14 was a rpm limit of my 2.4495 final gear(stock trans .693.55 rear end) and my refusal to brake the seals on my factory sealed injection pump. To raise the governor to 3500 or 4200rpm tell after 40mpg. 3500rpm =134mph 4200rpm =161mph. Without supporting modifications 4200 is not achievable. Stock lift pump bairly handles the stock motor lucky me it failed monday so the variable displacement piston pump is going in place of the diaphragm that came out. This is a reduced pressure high volume pump from the 2nd gen Cummins 94-98.


Gears, aero package and safty will be my focus for now.
__________________
1st gen cummins 91.5 dodge d250 ,HX35W/12
ehxsost manafulld wrap, Aero Tonto
best tank: distance 649gps mi 24.04 mpg 27.011usg
Best mpg : 29.3mpg 97mi 3.311usg 7/27/16


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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aerohead (11-18-2017), skyking (11-19-2017)