Thoughts on partial Kamm for S10 Blazer
 

I have been spending a great deal of time reading here about different ways to improve the air flow over the top of my truck. One the things I have identified as needing attention is the back of my Blazer. The back glass has a curve that is terrible for air flow. I tried an experiment with some home made (free) VG's to see if I could try to keep the air flow attached to the back window as best as possible, though I was not all that terribly successful. I have been reading a great deal recently about different iterations of partial Kamm backs, and I'm thinking this may be the route to go with my Blazer. Here is a pic as it sits now:

http://farm7.static.flickr.com/6085/...cab66dc2_z.jpg

Here is what I am thinking for a partial Kamm back, this is just a quick Gimp drawing with what I believe will be the best angle for it:

http://farm7.static.flickr.com/6070/...9de8cac2_z.jpg

I guess I'm looking for input on this idea, and feel free to offer up some constructive criticism please :). My plan at this time is to construct a test design out of either cardboard, or coroplast (sp?). Then do some testing to see how well it works. I'm pretty sure this is the best way to go from what I have noted in other vehicles here with a similar rear hatch area design. I had initially thought about just a spoiler but believe the partial Kamm is the way to go. While I may loose some aerodynamic efficiency in the design/placement, I'm planning on attaching it to the back glass to make it the most user friendly, not getting the way of the operation of the glass or the tailgate.

Double Post

My opinion is don't muck up your pretty truck, I'm sure that is out of line with the majority here though.

I would first consider installing a chin spoiler, see the first link in my signature.

Maybe you should consider something like a spoiler on your roof. It will be interesting to hear other's opinion of that idea. here are a few example of what I have in mind.

Apex Motoring - Pushing tuning beyond the limits.
http://www.apex-motoring.com/images/...of_Spoiler.jpg

a4 roof spoiler
http://istargazer.ca/sti/cf_roof_van...f-spoiler6.jpg
http://img61.imageshack.us/img61/7982/ps2rj8.jpg

Stillen G35 Bodykit Roof Spoiler Photo 3
http://image.modified.com/f/17919898...of_spoiler.jpg

Click link:
xj roof spoiler - JeepForum.com

DUSTGUARD - Egr Dustguard (Rear Roof Spoiler For Trucks/Suvs) - EGR
http://www.autotoys.com/pics/egrdustguard1.jpg

Body Kits For Cars - Carbodykits.com
http://www.carbodykits.com/images/T/...287-591552.jpg

I bet someone already makes something for your truck.

echo, echo....

I'd say if it's done well, it would not muck up your ride and could look good and keep the back a little more shaded too. My opinion would be to start the sloping a little sooner than you have it - I think it's flatter than it needs to be at first. Also, smaller tires (yours look oversized) that tucked into the body more might allow a rear wheel skirts. Also, some black coroplast disks would smooth up those wheels too.

X2

Whatever you do, keep it nice and clean like the rest of your ride is.

I'm subscribing to this thread so please update when you can:thumbup:

I see you already tried some white shark fin type vortex generators. How did they work out?

Automobile pictures by kach22i - Photobucket
http://i184.photobucket.com/albums/x...e/Blazer-3.jpg

I'm proposing more of a traditional spoiler which generates a controlled vortex which pulls air away with less turbulence than nothing at all.

Automobile pictures by kach22i - Photobucket
http://i184.photobucket.com/albums/x...e/Blazer-2.jpg