Quote:
Originally Posted by Tygen1
Am I even close in this overlay? I just scaled it so the bottom of the Template and the top of it met up with the ZX2, which happened to match up with the wheels as well.....
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Tygen1,I don't know if you ever got a satisfactory response from me.
I still don't know what #12 image is,but lets work from your image here.
All the shaded area is separated flow turbulent wake,which is what is robbing you at the gas pump after highway travel.
Since totally re-configuring the back of the car is out of the question,the template overlay will help you cheat a little.
What you want to do,is project part of the car up until it just touches the top of the curve above it,essentially cutting through the entire gray shaded region.
The easiest way to do it,is to extend the upper rear edge of the trunklid backwards,and upwards simultaneously.Car and Driver Magazine used a piece of bent aluminum sheet on their Pinto project.
If the "spoiler" is angled up more than 30-degrees it will add drag.Extend as far back,at 30-degrees as you dare.If you can make it all the way to the upper curved line of the overlay,quit.Your done!
If you can't go all the way,go as far as you can.You're the boss of that.
Anything you do to approach the imaginary line of the overlay/template will cut drag.
Be mindful of pedestrians walking by the back of your car.
If you want to get a little more ambitious,you could try the bi-wing spoiler Ford patented and used on one of their Probe concepts and made it ino production with their Merkur XR4Ti. Their is a smoke flow image of it in the FLOW-IMAGES gallery somewhere.