Tuft Testing 2nd Gen Honda CRX Rear Glass

[MetroMPG]

Did you have your side window(s) open? That would account for some of the tubulence seen at the glass edges. I guessed from the sound in the vid that you did.

I saw this when comparing window up to window down when tuft testing my Kammback mockup: http://ecomodder.com/forum/showthrea...sion-3518.html

[SVOboy]

Nope, windows closed. It's loud in the car without the carpet in.

[Daox]

The rear angle looks to be roughly 14°. There is definitely a curvature to it though.

The picture doesn't look perfectly level though either. The front end is slightly higher than the back end (referencing the trim piece on the door). But, its only about half a degree. So, the rear taper is probably closer to 13.5°.

[SVOboy]

Yep, the driveway isn't level, but I think it's only half a degree.

[rkcarguy]

Clear lexan boat-tail that doubles as extra storage and you're good to go

[SVOboy]

O, I've got plans

[rkcarguy]

that's a nice crx, I'd have a hard time riviting things into it. Doesn't mean a nicely fit boat-tail that slides into a reciever hitch and a modified front bumper cover can't be done though

[SVOboy]

Exactly what I was thinking!

[MetroMPG]

Originally Posted by SVOboy

Nope, windows closed. It's loud in the car without the carpet in.

Ah. Mine's louder with the rear seat out.

The other thing that will cause turbulence back there: side mirrors. I hear yours are not long for this world.

[bwilson4web]

Originally Posted by Daox

The rear angle looks to be roughly 14°. There is definitely a curvature to it though.

The picture doesn't look perfectly level though either. The front end is slightly higher than the back end (referencing the trim piece on the door). But, its only about half a degree. So, the rear taper is probably closer to 13.5°.

Thanks!

I used a spirit level with a scale and found the following:

• 11 degrees - roof at junction with rear window mount/liner
• 21 degrees - top glass near glass mount/liner
• 28 degrees - middle of rear glass
• 31 degrees - bottom of glass near junction with mount/liner

When I did my tuff testing, I only had a middle and lower region tuffted. I have to admit some surprise at the steepness. In fact, now I'm interested in seeing if I can measure the depth of this turbulent area.

I'll copy this data under my original tuff testing and continue the experiment. I have some loaner vortex generators coming and we'll get a chance to see the effect.

I also have a Kovatch "filter separator" pressure gauge that unfortunately has a scale that runs 0-30 psi when I need 0-30" of water. I'll have to modify the spring and calibrate it.

Bob Wilson