I've hit a milestone! The new 4.0 version of Champrius under construction just topped
50 mpg!
https://www.instagram.com/p/Ce30CVQLQWk/
There's still a lot to do. I already know the tail will give me several mpg, and I have high hopes for the new nose cone.
For those interested, here's the current list of mods that got me from 39.2 mpg to 51.3 mpg:
DELETE: +% mpg gain [cost, time]
1.5% Rear and Passenger seats [$10, 2 hrs]
1.0% ~1/3 of the interior [$10, 4 hrs]
1.0% Antenna [$0, 2 hr]
1.0% Rear Windshield Wipers [$10, 2 hrs]
0.5% Rear spoiler [$0, 2 hrs]
REPLACE:
4.0% Tiny side mirrors, added vortex generators [$40, 4 hrs]
3.0% Smooth moon hubcaps from pizza pans (rear only atm) [$100, 6 hrs]
2.0% Max tire pressure 44 psi of low resistance tires [$0, 10 min]
0.5%+ Hood insulation (better colder / short trips) [$50, 2 hrs]
0.5% Gas Cap, Radiator Cap [$30/100k, 20 mins]
0.5% Air Filter[$20/30k, 15 mins]
0.5% Synthetic oil [$80/10k, 2 hrs] with oil catch can [$40, 4 hrs]
ADD:
5.0% Extreme grille block to 40 sq in [$20, 15 mins]
4.5% Solar Panel as partial Kammback [$500, 6 hrs]
3.0% Dual Cat Shields [$300, 8 hrs]
3.0% Windshield wiper deflectors [$40, 2 hrs]
2.5% Wheel fairings (partial skirts for easy maintenance) [$50, 4 hrs]
0.0% Shrouded ceiling vent + signal booster [$200, 4 hrs]