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Owner: gkmatthews
Focus: 2006 Ford Focus ZX4
Displacement: 2 L
Fuel type: gasoline
Transmission: manual
Curb weight: 2658 lbs
Coefficient of drag: 0.31
Frontal area: 22.5 sq.ft.
Instrumentation: factory installed
Description: Aftermarket Cosworth Style aluminum intake manifold and aftermarket cold-air intake from WeaponR. Custom tune in order for proper function with these modifications.
Build Thread:
Current Mods: Aftermarket TPMS sensors:

Overinflating tires allowed for +11% increase in fuel economy over a 500+ mile test range vs. control. 44PSI in front tires, 37PSI in rear tires (different brands: front tires are Goodyear max PSI of 51; back tires are Firestone max PSI of 44; air added at 82°F so allows cushion of approx. +1 PSI for every +10°F [plus some wiggle room]).

New Shoes! (see main photo). They are from an '88 Foxbody. Tires are a max 44 psi; added 37 psi at around 70°F so it gains pressure up to around 40psi when the tires warm up to 100°F.

Neodymium Magnets surrounding oil filter to catch sub-50 micron particles. This will prevent long-term engine wear.

110 amp alternator (as opposed to 130 amp) with aftermarket voltmeter tied into instrument cluster.

Factory Tach/Speedo from a ZX5.

Calculated odometer correction factor of 7.60986% (likely due to larger tires)

Planned Mods: Soon
Official Fuel Economy Ratings
EPA city 23 mpg(US)
EPA highway 31 mpg(US)
EPA combined 26 mpg(US)

Actual Fuel Economy Performance
Lifetime 35.63 mpg(US)
Last 3 tanks 37.82 mpg(US)
90 days 36.37 mpg(US)
View Fuel Log
Last updated: Feb 10, 2025

(Created: 2024-05-31 14:44:33 / Modified: 2025-02-10 09:29:12)


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