Fuel Economy, Hypermiling, EcoModding News and Forum - EcoModder.com - View Single Post - The long road to Bonneville, goals are 40mpg useable pickup in the 150 club

gumby79 · 06-01-2018, 03:53 AM

Most "H" or fasters speed rated tires eather have no load capacity or are 28" or smaller or10-30"wide drag rears.

To day I've found some options

32.18"D 235/55r22 (104w) 1984lbs 168mph $154 usd

31.41"D 275/25r26 (98w) 1653lbs 168mph $215 sud

30.04"D 255/50R20 (109Y) 2271lbs 186mph

B stock rpm +.20 od + 3.08 gear swap.
C as above + 3500 gov spring.

Now comes the question witch one will have the best coefficient of rolling resistance?
What effect will the different wheel sizes have?
Options 1 is 140.5 good for 130club +150club rated
option 2 is 137. 2mph@100% transfer of rpm. (The 518 non lockup torque converter has demonstrated a 5% loss of RPM)
Option 3 131.2mph this option will requires the 3500rp. Gov spring for the 130 club . And will be useable allthe way to 175 + to qualify for the long course.

06-01-2018, 03:53 AM	#14 (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	Choices for rubber gears... Most "H" or fasters speed rated tires eather have no load capacity or are 28" or smaller or10-30"wide drag rears. To day I've found some options 32.18"D 235/55r22 (104w) 1984lbs 168mph $154 usd 31.41"D 275/25r26 (98w) 1653lbs 168mph $215 sud 30.04"D 255/50R20 (109Y) 2271lbs 186mph B stock rpm +.20 od + 3.08 gear swap. C as above + 3500 gov spring. Now comes the question witch one will have the best coefficient of rolling resistance? What effect will the different wheel sizes have? Options 1 is 140.5 good for 130club +150club rated option 2 is 137. 2mph@100% transfer of rpm. (The 518 non lockup torque converter has demonstrated a 5% loss of RPM) Option 3 131.2mph this option will requires the 3500rp. Gov spring for the 130 club . And will be useable allthe way to 175 + to qualify for the long course. 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