[mannydantyla]

I just ordered this $20 OBCII scan tool that you connect to with your iOS or Android divice via wifi. http://amzn.to/2GwmCTt

I'll need to download a $5 app though to use it but if I like it maybe I'll find a used iPad or something to keep in the car permanently.

Originally Posted by freebeard

As for cutting up a lift gate; I suspect you'd do better to start with strips of flat sheet. What you're proposing is similar to the boxed cavity I mentioned in Permalink #48. Also the Koenig-Fachsenfeld (corrected spelling) tearing edges mentioned in permalink #28.

Exactly!

Originally Posted by freebeard

http://ecomodder.com/forum/showthread.php/random-wind-tunnel-smoke-pictures-thread-26678-17.html#post544437

This is a similar shape. The vertical edges are 'hotter'. two triangular fins from the outer edges down toward the taillight would be a good start on a boxed cavity. Here — according to the text is an explanation, if you can see Photobucket images: http://ecomodder.com/forum/showthrea...tml#post542668

Two triangular fins from the outer edges down toward the taillight... ??

I can't see the photobucket image in the second link, either

I don't know why I didn't do this sooner but I looked up the drag coefficient for the Jeep Cherokee. Cd is a whopping 0.52!

Also, folks are saying that for a box cavity to be effective, air flow needs to be pretty smooth to begin with and a diffuser really helps. http://ecomodder.com/forum/showthrea...uck-26367.html

Once the OBCII wifi scan tool arives in the mail, I'll make a cardboard mockup and do some testing...

Can this tell us anything??