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Owner: woodstock74
Starship: 2008 Toyota Prius
Displacement: 1.5 L
Fuel type: gas/electric hybrid
Transmission: CVT
Curb weight: 2932 lbs
Coefficient of drag: 0.26
Frontal area: 22.4 sq.ft.
Instrumentation: Torque app
Build Thread:
Current Mods: >Replaced original torn up front underfloor panels with new
>Added rear underfloor panel to right of exhaust to close out small area and eliminate parachute bumper in that area
>Added 2 large longitudinal fins (80 mm tall) along edge of car trailing edge per aerodynamics paper, "Drag and lift reduction of a 3D bluff body using flaps". Fits within the seam between the rear hatch and the car body, bolting to pre-existing holes on car side
>Upper grill blocker using the pipe insulation foam method
>Front underfloor infill panels ahead of each front tire spoiler eliminating concavity, making it flush to the front tire spoilers

Planned Mods: >Additional rear underfloor panel to further close out parachute bumper and fill in where factory underfloor panel stops
>Separation edges along side of car trailing edge around rounded tail lights
>Catalytic converter shield
>Flush hub caps. Have purchased pizza pans, just haven't gotten the nerve to pop off the old, cracked and brittle looking ones currently on the car. Intention is to secure them to the existing hubcaps with bolts (I have the 16" wheels and don't have the aero rings of the 15" wheels) though have long term concerns about them coming off. Having done this mod to two other cars, hubcaps coming off is a real potential issue.
>Contemplating an underfloor panel located below the secondary section of the cat/exhaust, that's intent is slightly deflect airflow away from the drooping exhaust tube that squirrels under the fuel tank. This tube/pipe has airflow going above and below and is very clearly visible when you look underneath the car from the front or rear as it drops below the car. Would make an insulation foam board male form to shape and epoxy fiberglass over and then dig out foam when cured as I've done similar for other underfloor infills.
Official Fuel Economy Ratings
EPA city 48 mpg(US)
EPA highway 45 mpg(US)
EPA combined 46 mpg(US)

Actual Fuel Economy Performance
Lifetime 42.95 mpg(US)
Last 3 tanks 45.31 mpg(US)
90 days 44.21 mpg(US)
View Fuel Log
Last updated: Jun 10, 2024

(Created: 2022-09-02 19:27:32 / Modified: 2024-06-10 20:23:10)

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