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Old 10-18-2019, 04:32 AM   #713 (permalink)
Tahoe_Hybrid
Master EcoModder
 
Join Date: May 2019
Location: California
Posts: 512

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
90 day: 25.57 mpg (US)
Thanks: 2
Thanked 105 Times in 96 Posts
Quote:
Originally Posted by Bill the Engineer View Post
I originally considered using the system out of a hybrid Tahoe, but it wouldn't have given me nearly the 50+ mpg that the Prius system will.



The best I have gotten was 31MPG in MY city 26.7 highway and 28.8MPG combined (over 200 miles, 40 miles city/164 miles highway),

that is stock hypermiling with a 11 year old worn out battery

I don't think you will be leaving V4 mode often on that car (it weights 2,000 pounds less )


41-43MPH is the optimal fuel efficiency spot ( CVT mode) 45MPH+ it's on gear #4 and you lose quite a bit

that is how i'm able to get BIG numbers 100% stock (the engine is just idling at that speed )



I estimated you would get about 46-50MPG on that 6.0L V8 OR you will twist the chassis.up. with all that torque basically has 3x the power of a Prius.




the theoretical max on a flat level grade NO extra wind and other favorable conditions etc.. is 38-42MPG 36mpg 100% stock is more likely IRL



Quote:
Originally Posted by Bill the Engineer View Post
I originally considered using the system out of a hybrid Tahoe, but it wouldn't have given me nearly the 50+ mpg that the Prius system will.
the coefficient drag on that firebird is horrible i suspect the 0-60 time will 15 to 20 seconds which means you can't use it on the highway(will not be able to merge safely)


2014 Toyota Prius C
0-60 MPH 10.9 sec
0.24 drag coefficient


on the tahoe it's nice the the 08 and 09 are not electronic governor locked 0-60 is 6.8 seconds
(My09 is electronic governor locked to 8.9 seconds)



GM started locking them after the unintended acceleration issue with toyota.....

Last edited by Tahoe_Hybrid; 10-18-2019 at 04:51 AM..
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