[BabyDiesel]

Originally Posted by MetroMPG

I agree - I think you've got a little bit of separation/recirculation right around the center mounted brake light.

Most of the time the tufts are sitting relatively still, but every once in a while you see one going sideways & backward.

To me, it looks pretty good. Recirculation/locked vortex is much more evident on the back window of an '07 Civic or '06 Corolla that I tuft tested:

Civic:



Corolla:

I believe the reason separation is less evident on my car than your Corolla and Civic is because I was using too long of tufts. The ones are the vortex were 6-8"! Your tufts are much shorter and lighter, which would get "sucked up" and around by the vortex easier, making it more evident.

There's an excellent excuse to do more testing

Originally Posted by MetroMPG

Did you make the video of the trunk lid? The few seconds you can see it in your vid, it looked OK. Turbulent, but attached flow.

My brother was not able to focus on just the lid. There is another video that I have not uploaded to YouTube yet that shows it a bit better IIRC. I think that the vortex *might* extend partially down the lid, but once again, tufts are too long and video is not the best to make conclusive assertions. So attached but turbulent flow. That is better than I would have expected! I won't be satisfied until it is all attached though

Retest time

Originally Posted by 2000mc

Without seeing major issues, I think it's hard to read into too much

I though arcosine's tuff test on his spoiler-less sc1 looked pretty hard to beat - http://ecomodder.com/forum/showthrea...tml#post325746

...but my scangauge says my modded spoiler beats no spoiler, even though my spoiler is far from optimal with sawed off ends - http://ecomodder.com/forum/showthrea...tml#post467518

I agree. It is far from optimal, but we can't make concrete statements yet.

Thank you for the links! Arcosine's tufts look very well attached on the entire vehicle. Which is crazy, his car is not that different from my own.

Your modded spoiler makes me want to grab a JY spoiler off a ZX2 and give this a try You should do tuft testing and see the effects between no spoiler vs. modded spoiler. I'm interested the see how the air is effected

Originally Posted by cRiPpLe_rOoStEr

Sounds like a good excuse to make experiences with a Kammback.

I think this will be my next project, before I go full Basjoos.

Originally Posted by aerohead

here's an image hucho shared in his text.

YES! This is nearly exactly what I have seen!

How does remedy these vortices, without doing a boat tail?

Originally Posted by freebeard

i buy into babydiesel's description more than hucho's. I think the vortexes flatten and spread.

Hucho's diagram is a generalization of what happens IMO. Of course, the vortices will be different for every car due to different angles, pillar design, etc.

I'd take my words with a grain of salt. All I have seen is while driving down rainy roads and looking back to make observations, and doing some "pressure washer simulation" in the backyard