View Single Post
Old 06-14-2018, 10:17 AM   #18 (permalink)
Vman455
Moderator
 
Vman455's Avatar
 
Join Date: Feb 2012
Location: Urbana, IL
Posts: 1,937

Pope Pious the Prius - '13 Toyota Prius Two
Team Toyota
SUV
90 day: 51.62 mpg (US)

Tycho the Truck - '91 Toyota Pickup DLX 4WD
90 day: 22.22 mpg (US)
Thanks: 199
Thanked 1,802 Times in 939 Posts
I added an explanatory decal to my rear windows, to educate passers by:



Maybe this will pique someone's curiosity.

Also, I tested hood pressures yesterday with my Magnahelic.



The results are not what I expected. I'll put up a graphic with the numbers, but what surprised me is that--there is a negative pressure gradient (top relative to underside) across the entire hood! Although, if I had looked at this pressure map I already had stored on my computer, it wouldn't have been so surprising:



Now to hunt down some vents with the proper curvature and decide on siting.

Updated weight list: The interior panels are back in; I may remove them for the competition next year, but it's significantly louder inside with them gone. Windshield washer reservoir and sprayers are now gone, for a savings of nearly 13 lbs!

Added sound insulation: 48.6 lbs
Trailer hitch receiver: 28.8 lbs
Rear right seatback: 26.4 lbs
Spare tire: 25.8 lbs
Tail: 21.8 lbs
Cargo carrier: 19.6 lbs
Hatch insulation: 16.4 lbs
Rear left seatback: 13.2 lbs
Windshield washer reservoir, pumps, nozzles, and fluid: 12.7 lbs
Rear seat bottom: 12.2 lbs
Rear seat belts, seat brackets, hardware: 10.7 lbs
Front speakers and baffles: 10.6 lbs
Front door insulation: 9.8 lbs
Rear door insulation: 9.4 lbs
Wheel covers with pans: 9.4 lbs (2.5 lbs wheel covers alone)
Front swaybar and endlinks: 8.4 lbs
Jack and tools: 8.2 lbs
Trunk mat: 5.4 lbs
Rear speakers, miscellaneous hardware: 5.3 lbs
Headunit: 5.2 lbs
Hatch door insulation: 5.0 lbs
Floor mats: 4.5 lbs
External mirrors: 4.2 lbs
Cargo cover: 4.2 lbs
Front speaker crossovers and wiring: 3.2 lbs
Passenger side wiper: 2.8 lbs
Rear wiper and motor: 2.4 lbs
Intake resonator: 2.0 lbs
Sound system wiring: 1.5 lbs
Vehicle Proximity Notification System: 1.5 lbs
A-pillar insulation: 1.2 lbs
Hood insulation: 1.2 lbs
Engine cover: 1.0 lb
Horns: 0.5 lb


Total: 338.9 lbs/170.9 lbs from OEM
OEM curb weight: 3042 lbs
New estimated curb weight: 2871 lbs

__________________
UIUC Aerospace Engineering
www.amateuraerodynamics.com
  Reply With Quote
The Following User Says Thank You to Vman455 For This Useful Post:
freebeard (06-14-2018)