Metro aerodynamics - Page 18 - Fuelly Forums

Android Users - Coming Soon! - Migrating from aCar 4.8 to 5.0

Reply
 
Thread Tools Display Modes
 
Old 09-07-2006, 11:27 AM   #171
Registered Member
 
MetroMPG's Avatar
 
Join Date: Dec 2005
Posts: 4,223
Country: United States
That's what I meant, yes.

So you're suggesting a 4-7% FE increase, or a 4-7% change in Cd?
__________________

MetroMPG is offline   Reply With Quote
Old 09-08-2006, 05:07 PM   #172
Registered Member
 
MetroMPG's Avatar
 
Join Date: Dec 2005
Posts: 4,223
Country: United States
Spent a couple more hours on the tray this evening.
__________________

MetroMPG is offline   Reply With Quote
Old 09-08-2006, 05:26 PM   #173
Registered Member
 
zpiloto's Avatar
 
Join Date: Mar 2006
Posts: 1,225
Country: United States
Quote:
Originally Posted by MetroMPG
Anyway, the rear portion is in place. The hard part was coming up with a way to extend & taper the control arm surfaces upward toward the bumper and still allow flex in the tray to move with the suspension.
Nice. Don't forget to put the VG's under there
zpiloto is offline   Reply With Quote
Old 09-09-2006, 03:06 PM   #174
Registered Member
 
The Toecutter's Avatar
 
Join Date: Mar 2006
Posts: 612
Country: United States
Send a message via AIM to The Toecutter
Quote:
So you're suggesting a 4-7% FE increase, or a 4-7% change in Cd?
Change in FE.
The Toecutter is offline   Reply With Quote
Old 09-09-2006, 03:18 PM   #175
Registered Member
 
zpiloto's Avatar
 
Join Date: Mar 2006
Posts: 1,225
Country: United States
I'm going for 5% increase in FE. It will really help the P&G. I'm optimistic when do you think you'll be able to test.
zpiloto is offline   Reply With Quote
Old 09-09-2006, 05:35 PM   #176
Registered Member
 
MetroMPG's Avatar
 
Join Date: Dec 2005
Posts: 4,223
Country: United States
Finished tapering one of the control arms today (15 mins). I'll put in the time to finish it up tomorrow, and since I'm going away mid-end of the week, I'll try to get in some runs before I leave.

I'd be tickled to get +5%. Seems a reasonable estimate.
MetroMPG is offline   Reply With Quote
Old 09-10-2006, 06:42 AM   #177
Registered Member
 
MetroMPG's Avatar
 
Join Date: Dec 2005
Posts: 4,223
Country: United States
Here's some info to use for an edumacated guess:
MetroMPG is offline   Reply With Quote
Old 09-10-2006, 10:26 AM   #178
Registered Member
 
zpiloto's Avatar
 
Join Date: Mar 2006
Posts: 1,225
Country: United States
That increase would be at a steady state speed. I would think that there would be a better increase in your city driving even though the speeds are realitively slow because of the increase in coasting ability. Althought I think it would be impossible to quantify. Looking foward to your results.
zpiloto is offline   Reply With Quote
Old 09-10-2006, 05:11 PM   #179
Registered Member
 
MetroMPG's Avatar
 
Join Date: Dec 2005
Posts: 4,223
Country: United States
Recorded a couple of runs this evening with the undertray on.
MetroMPG is offline   Reply With Quote
Old 09-10-2006, 07:04 PM   #180
Registered Member
 
zpiloto's Avatar
 
Join Date: Mar 2006
Posts: 1,225
Country: United States
Quote:
Originally Posted by MetroMPG
I'll try to do temperature compensation calcs later, and see what that says, but the other thing I need to consider is that (a) I possibly made things worse by adding the tray, or (b) it didn't help any!
WOW 57 degrees nice I would really be suprised if it did not help there is too much data that say otherwise. Could you tell if the coast down were better? That's one thing that really jumped out at me was how much longer the speed took to bleed off and how much longer the coast was on my usual routes. Like you said need to test the same day. Just run the fireflea through the paces when you get back from your sea adventure. Got any pic's?
__________________

zpiloto is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Is your vehicle set correctly? DTMAce General Fuel Topics 1 03-17-2010 06:21 AM
fuel economy question Creamycaesar General Fuel Topics 19 02-08-2010 08:37 AM
p07 ECU $15 Matt Timion For Sale 4 08-27-2006 12:25 PM
I will be bike riding across Iowa kickflipjr People Powered 11 08-02-2006 04:22 PM
Some glue that won't melt when it gets hot? SVOboy General Maintenance and Repair 16 08-01-2006 08:15 AM

Powered by vBadvanced CMPS v3.2.3


All times are GMT -8. The time now is 10:41 AM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.