So, I’ve had an ongoing thread about this, but it’s been pretty quiet in the “Success Stories” forum. I figure I’d get more advice here.
https://ecomodder.com/forum/showthre...-new-post.html
I bought the car in 2022 I think, and have been tinkering with it since. I’ve gone from 38 up to 47 MPG. I’ve reduced high speed instability, improved top speed, and done lots of testing. It’s been running a front undertray, partial grille block, rear Bonneville-type spoiler, wheel discs, and an airdam. I want to take it even further.
The main design constraint is that I want to sell this car down the road. All of my modifications must be reversible. So hood, trunk, bumpers, wheels are all fair game.
This is where I’m at currently. I used tuft-testing to observe airflow over a trunk extension I made. This is designed to capture an air bubble and create an artificial fast-back roofline.
From my photos, you can see that there is ~2” spacing between the trunk and the longer tuft. There still seems to be attached flow along the surface of the extension.
I wanted some opinions on this design. Let me know.
12/2/23: Here is a summary of this thread up the current date, for those who want an abbreviated format:
https://youtu.be/ouDkptwDQMs?si=pa5OQiFCoUDyBqr0