View Single Post
Old 12-15-2017, 09:26 PM   #8 (permalink)
Master EcoModder
gumby79's Avatar
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
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
Originally Posted by Xist View Post
The air dam on my Accord (and one that I tried on my Forester) were marine wrap. It would undoubtedly look better with shrink tape.

Having the grill completely blocked off was great for the first 75 miles or so, but then I started hitting hills.

Right now it seems like the easiest route is to completely cover the lower grill and put a fire blanket over my engine for the first fifty miles, but needing to stop just for that does not sound like a great plan.
The one you tried on your Forester sure was neat I think a beach ball would have been a really good bow break shape.
I used the industrial 12mill self-extinguishing version shrink wrap on my Aero Toronto prototype. V2 will get Ortex destructive testing.This tape is meant to be a peel off protective barrier when it is applying a super sticky adhesive that will damage paint like gluing the edge of your shrink wrap to your fenders and Hood to get a very smooth transition to the existing shape. At the wind tunnel I used this to fill the gap between the headache rack and the back of the cab, cab to bed Gap, and fill the discrepancy caused by a design attribute in my Aero Tonto to accommodate in removable rear section of a ladder rack , that I will not be including on version 2.
I pick this stuff up last winter and used two pieces over my grill cut to shape nice and neat, much better than the blue foam I had in the upper holes. I try painting the fome and now they resemble a cinder block with all the little holes just a lot lighter than cement. No pics sorry of that. With this whale of a truck I found blocking the radiator with cardboard between the intercooler and the radiator to be more effective at retaining operating temperatures especially in eco mode .stock143-175f maxVs 100%grill 160--181 ,60% radiator only 175 -192. I added a panel to fill the open Passage that lead from the opening between the bumper and the body out to the ground between the frame rails with this panel installed and 100% grow block air is forced between the body panel and the bumper and this forms a duct that flows through the front of the radiator bypassing the intercooler increasing my intake air temperatures yet keeping the engine cold according to Cummins for every one degree you raised intake air temperature there is a corresponding 3 degree increase in exhaust temperature on a diesel engine. The downside only the lower portion of the radiators actually cooling the engine the upper section is in stagnant air being warmed by the intercooler and the refrigerant compressor in defrost mode as well as the transmission liquid to air cooler this causes unnecessary activation of the mechanical fan clutch at temperatures lower than the thermostat opens. According to literature from Cummins the fans bolted to their Motors pull anywhere from 25 to 75 horsepower mine is on the 25 or 25 to 35 horsepower range the 25 is more like the 4bt 4 cylinder.

Dream big chisel down to reality
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

  Reply With Quote
The Following User Says Thank You to gumby79 For This Useful Post:
aerohead (12-16-2017)