Fuel Economy, Hypermiling, EcoModding News and Forum - EcoModder.com - View Single Post - Coastdown testing question: does starting speed matter for consistency?

NeilBlanchard · 03-14-2009, 04:36 PM

Hi,

I think the best solution (as suggested in the Instructable) is to video the process, and then watch the video and stop it every 10 seconds, and record the speed. This is another area where the SGII will be quite helpful -- if you video tape it with speed and TPS (or RPM) on 2 of the displays, you can easily see what is going on.

I was wondering why the Instructable has the test start at only 70kph -- this would seem to barely be in the critical aero range? Also, are you supposed to coast to a stop, or just down below a certain speed?

03-14-2009, 04:36 PM	#14 (permalink)
NeilBlanchard Master EcoModder Join Date: May 2008 Location: Maynard, MA Eaarth Posts: 7,908 Mica Blue - '05 Scion xA RS 2.0 Team Toyota 90 day: 42.48 mpg (US) Forest - '15 Nissan Leaf S Team Nissan 90 day: 156.46 mpg (US) Number 7 - '15 VW e-Golf SEL TEAM VW AUDI Group 90 day: 155.81 mpg (US) Thanks: 3,475 Thanked 2,952 Times in 1,845 Posts	Hi, I think the best solution (as suggested in the Instructable) is to video the process, and then watch the video and stop it every 10 seconds, and record the speed. This is another area where the SGII will be quite helpful -- if you video tape it with speed and TPS (or RPM) on 2 of the displays, you can easily see what is going on. I was wondering why the Instructable has the test start at only 70kph -- this would seem to barely be in the critical aero range? Also, are you supposed to coast to a stop, or just down below a certain speed? __________________ Sincerely, Neil http://neilblanchard.blogspot.com/