Aerodynamic Streamlining Template Overlay for ZX2? - Page 4 - Fuel Economy, Hypermiling, EcoModding News and Forum

Tygen1 · 01-06-2010, 11:56 PM

Thanks so much Aerohead! I see your in great demand lately and I really apprciate your indulging my many questions. If it wasn't so cold out and getting dark so early, I would have done this already. The weekend it almost upon us!!!

Tygen1 · 01-07-2010, 12:00 AM

Quote:

Originally Posted by moorecomp

I like this photoshop from teamzx2.com. A removeable cover over an Elcamino style rear would be awesome. A more square rear edge would probably be better for aero. I so want to do this to my car.

Thanks for the pic Moorecomp! I think you should do this. A more Hatch Back/Squared Off back end should help the ZX2. You should work on some photoshop renderings and see if you can get the roof line on that 15 degree taper with more of a ducktail on the back edge. While you at it why not re-shape where the bumper wraps around to give more a clean seperation for the air...

BTW, the motor in that silver car, is the motor that is now in my ZX2

He's somewhat local to me and I bought the motor when he totaled that car.

mcrews · 01-07-2010, 01:10 AM

Quote:

Originally Posted by moorecomp

I like this photoshop from teamzx2.com. A removeable cover over an Elcamino style rear would be awesome. A more square rear edge would probably be better for aero. I so want to do this to my car.

WOW that is beautiful.

A little off topic, but they did the same thing to a 66 mustang coupe right after they were introduced!
I had completey forgotten about it.......

aerohead · 01-08-2010, 05:18 PM

Quote:

Originally Posted by Tygen1

Thanks for the pic Moorecomp! I think you should do this. A more Hatch Back/Squared Off back end should help the ZX2. You should work on some photoshop renderings and see if you can get the roof line on that 15 degree taper with more of a ducktail on the back edge. While you at it why not re-shape where the bumper wraps around to give more a clean seperation for the air...

BTW, the motor in that silver car, is the motor that is now in my ZX2

He's somewhat local to me and I bought the motor when he totaled that car.

Last night I looked at the Briggs Cunningham C4RK LeMans Coupe. at GOOGLE.It was one of the last cars I know of that Dr.Kamm was involved with.
The rear of the roof was chopped like the back of a semi.No curve.Zero-zip-nada!

Tygen1 · 01-09-2010, 09:48 PM

So heres the results.

Spoiler was set to 30 degrees, with an angle of interception to the roof of approximately 13-14 degrees

Conditions: 30 degrees F, 30.17 Baro, 33% Humidity, Winds NNW 9mph.
No wind on route, unless noted, road is surounded by trees. Starting Speed Was 70mph, then coasted down to 30mph. Runs were started in the same place, unless noted, going each direction, road is not flat. All runs ended in approximatly the same place as well.

First Coast Down Run going West with Spoiler:
West, 53.7 sec.
East, 1.00.2
West, 54.6
East, 1.00.3
West, 59.6
East, 1.00.2
West, 57.4

Now without spoiler going East to start:
East, 101.1 sec.
West, 102.2 (tailwind, enough to blow a flag by the road)
East, 101.5
West, run spoiled by someone deciding to park in the road

East, 103.4
West, 59.4
East, 102.6
West, 55.0 (started and ended in a different spot due to "traffic")

Now with Spoiler again.....wait....whats that sound, thats the sound of the spoiler getting ripped off at 65mph, should have put on more tape! Made two runs without knowing it was off, then drove under a street light and noticed it wasn't there. The next half hour was spent in the dark looking for it. Ran out of time and couldn't finish. Either way, these next two numbers are without bias, because I thought the spoiler was there and it was not, but I did have a lot of flapping tape

East, 1.00.1
West, 55.7 (started in the same place as noted above)

With some creative droping of highs and lows to account for the inconsistancies I get 58.06 sec. with Spoiler and 60.41 without spoiler. It would seem the spoiler did not help in this configuration.

Edit: Some notes after some pondering.... I believe the West bound times are as inconsistant as they are because I did not have land mark to reach 70mph by and therefore had an inconsistant start point and because it was a bit hilly, the ending point on the West Bound coast down was an up hill. So we could just drop out those times and just look at the East Bound times. If we do that we get a 1.5 longer coast down time with the spoiler vs. 2.35 as I calculated it before.
I also noticed that quite a bit of dust had accumulated under the spoiler, in just one hour of driving. So this leads me to believe that it just increased the size of the wake.

I believe the next steps will be some tuft testing to see what the air is doing on the trunk lid and I'd like to try a horizontal extention to see what effect that has. Also need to try and find a better road to test on.

waiting on some feedback from you fellas...

alohaspirit · 01-11-2010, 12:54 AM

why dont you let it snow on your car and then drive

let the wind make a shape for you

MetroMPG · 01-11-2010, 12:57 PM

Tygen1: posted a "thanks" for that testing effort.

It sucks when (a) the results don't go in the direction you would like, and (b) the thing being tested falls off the car before the test is done. (Both have happened to me! )

But it's still good to share the info.