Fuel Economy, Hypermiling, EcoModding News and Forum - EcoModder.com - View Single Post - Eco modding the Tahoe Hybrid 40MPG Goal..

Tahoe_Hybrid · 01-19-2020, 08:02 PM

I want to Eco mod my Tahoe Hybrid chevy gave us a good start at 0.34 Coefficient
Same as a Geo Metro

but I noticed some issues that could offer me better mpg

both electrical
front end, rear end and underbody wise

I;ll start with the electrical system.. it's weak
there is some weird ground system that offers issues , too many connections (7 connections) inbetwwen the inverter and the battery.
it does not help they used crappy aluminium cables
this causes voltage sags once it's warmed up and robs gas mpg as the 60KW alternator has to run or siphon power from the HV battery..

it's going to cost 320$ to replace the cables and that includes a 6,000 Farad Capacitor bank system. I sourced some high Quality used caps on the cheap 30$ for each 1500F Big brand name.. and brand new copper cables

so the electrons can flow freely..

second phase will do rear end work and then under body work... the goal is to keep it around $1500..

35-40MPG City is the Goal which is easily achievable... in EVT2 mode

YES I have gotten 31MPG (@ 42MPH) but in favorable weather conditions (the light wind shifted directions perfectly for me) I was able to keep it in EVT2 mode...

i have done 28mpg on the highway drafting behind 18wheelers i hate it though because they go too slow

25-26mpg by my self..

01-19-2020, 08:02 PM	#1 (permalink)
Tahoe_Hybrid Master EcoModder Join Date: May 2019 Location: California Posts: 513 2020 - '08 Chevy Tahoe H Last 3: 18.4 mpg (US) 2021 - '08 Chevy Tahoe H 90 day: 17.08 mpg (US) 2022 - '08 chevy Tahoe LT Last 3: 14.38 mpg (US) 2023 - '08 Chevy Tahoe Last 3: 22.61 mpg (US) 2024 - '08 Chevy Tahoe 90 day: 22.35 mpg (US) Thanks: 2 Thanked 105 Times in 96 Posts	Eco modding the Tahoe Hybrid 40MPG Goal.. I want to Eco mod my Tahoe Hybrid chevy gave us a good start at 0.34 Coefficient Same as a Geo Metro but I noticed some issues that could offer me better mpg both electrical front end, rear end and underbody wise I;ll start with the electrical system.. it's weak there is some weird ground system that offers issues , too many connections (7 connections) inbetwwen the inverter and the battery. it does not help they used crappy aluminium cables this causes voltage sags once it's warmed up and robs gas mpg as the 60KW alternator has to run or siphon power from the HV battery.. it's going to cost 320$ to replace the cables and that includes a 6,000 Farad Capacitor bank system. I sourced some high Quality used caps on the cheap 30$ for each 1500F Big brand name.. and brand new copper cables so the electrons can flow freely.. second phase will do rear end work and then under body work... the goal is to keep it around $1500.. 35-40MPG City is the Goal which is easily achievable... in EVT2 mode YES I have gotten 31MPG (@ 42MPH) but in favorable weather conditions (the light wind shifted directions perfectly for me) I was able to keep it in EVT2 mode... i have done 28mpg on the highway drafting behind 18wheelers i hate it though because they go too slow 25-26mpg by my self.. Attached Thumbnails Last edited by Tahoe_Hybrid; 01-19-2020 at 08:55 PM..