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Old 12-21-2019, 01:40 AM   #81 (permalink)
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Join Date: Dec 2014
Location: Butte, Montana
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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
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: 20.63 mpg (US)
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Continuing the conversation

Throwing some ideas out on how to flesh out the skin for race only rear IC
1 rules state bed cover cannot be higher than the top of the bead rail. They only state a max NO min. So Im thinking a verry large NACA duct 'ish.
Top "contoured plate"
never fails...

Bottom with an additional section forming the front half of the NACA duct.

From the back with the horizontal part of the Bonneville spoiler.

3/4 view with a pice of 3/8 polycarbonate twin wall( similar to colorplast) 8"x58" +2"gap adding up to regulation 10". 58"is the inner plane of the rear tires.

Set the tailgate at an upward angle to match the diffuser starting at rhe differential.


For the street. Flesh it in the same as the front. Same twin wall 2' x 8' bent qith a heat gun needed 10' to makeit match the IC correctly.

For the front.

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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

'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 (12-26-2019), BamZipPow (12-31-2019)