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gumby79 · 12-21-2019, 01:40 AM

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.

12-21-2019, 01:40 AM	#81 (permalink)
gumby79 Master EcoModder 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) Thanks: 208 Thanked 428 Times in 279 Posts	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. Attached Thumbnails __________________ 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