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Owner: Postal268
FrankenRex: 1990 Honda CRX HF
Displacement: 1.5 L
Fuel type: gasoline
Transmission: manual
Curb weight: 1967 lbs
Coefficient of drag: 0.29
Frontal area: 19.5 sq.ft.
Instrumentation: vacuum gauge
Description: This car has been hobbled together by so many different cars at this point it's not funny. I've had to replace a lot of body parts from animal impacts to the sides and front (Deer and such) A previous owner did some engine modifications like putting the 1.6l SI fuel system and ecu on the motor so that's probably hurting my mpg but no clue.

Why I went with an AGM battery over a deep cycle.

It was lightweight and cost only $70. Draw back is battery life is crazy short, I'm talking don't use the car at all while not running short. I kept a jump start battery in the car at all times just in case, but decided to wire it in permanently for convenience so if I need to use the car while it's off, like engine off coasting for example, I just hit the button on the jump start battery to keep the car from dying. Total weight of both batteries is only 15 pounds, and I can jump start my car with the push of a button.
Build Thread:
Current Mods: Just listing all modifications to car, eco or not

Previous owner mods
Ram air intake
Performance Exhaust Headers/Factory Cat Delete
Large aftermarket muffler
MPFI Si Swap (1.6L SI intake manifold/throttle Body/Fuel Rail/Injectors/ECU)

Mods I've done
Extended ram air to cold air intake
Cheap Amazon high flow cat added
Vacuum Gauge
Air/Fuel Ratio Gauge
Oil Pressure Gauge
Tire Pressure/Temps Sensors and monitor
Front and rear strut bars
Front aftermarket struts (slightly lowered front)
Front aftermarket Stabilizer bar (stiffer, lighter)
Front aftermarket radius rods
12 pound AGM battery
3 pound jump start battery mounted & wired in
Solar Panel to keep battery topped up
Half size radiator
Plastic tub lid covering half the grill from inside
Weather strip (w/ LEDS) to fill in gap above headlights
39 PSI tire pressure
AC compressor belt removed (AC is broke but plan to repair)
Small spoiler installed on hood to direct airflow over wipers
Carbon Fiber Vented Hood
SI front brake swap

Planned Mods: Rear wheel skirts

Every mod below here I have parts for, but are not on yet

VTEC swap
Official Fuel Economy Ratings
EPA city 40 mpg(US)
EPA highway 47 mpg(US)
EPA combined 43 mpg(US)

Actual Fuel Economy Performance
Lifetime 44.48 mpg(US)
Last 3 tanks 42.44 mpg(US)
90 days 44.02 mpg(US)
View Fuel Log
Last updated: Feb 05, 2023

(Created: 2022-04-10 14:49:47 / Modified: 2023-02-05 03:20:27)

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