View Single Post
Old 12-03-2011, 11:36 PM   #12 (permalink)
SentraSE-R
Pishtaco
 
SentraSE-R's Avatar
 
Join Date: Jun 2009
Location: Bay Area, California
Posts: 1,485

Mean Green Toaster Machine - '06 Scion xB
Team Toyota
90 day: 48.92 mpg (US)
Thanks: 56
Thanked 286 Times in 181 Posts
Old Tele, for sure, that would be nice. A savvy person might be able to daisy chain another device using the other RJ-45 port on the SG.

Here's a photo of my SG/UG data logging setup.


Quote:
Originally Posted by SentraSE-R View Post
A typical glide from 40-25 mph in my boxy (8.77 CdA) xB is ~30 seconds, and almost every subcompact to mid-size car does better. Adding a 30 second glide to the data yields the following results:


The results get better with lower speeds. My pulse:glide ratio is 1:3 (10:30) in fourth gear 25-40 mph P&G. It's 1:5 (8:40) in third gear 15-32 mph P&G. It's 1:10 (3:30) in second gear 11-25 mph P&G.
I tried David's suggestion to log TFC after setting my fuel cost to $10/gallon. Unfortunately, it did not vary a bit from $1.03 during the entire pulse cycle, even after I went into EOC. Scratch that idea.

I ran two 95% LOD pulses, one logging GPH, and one logging LPH. I was pleasantly surprised to find I could simply set my fluid measurements to liters, leaving distance in miles, and then I could log LPH. When/if I convert the data to GPH or MPG, or keep them as LPHK, the LPH data show more resolution. The LPH fuel usage goes from 0.07 to 10.9, v. the GPH range from 0.02 to 2.81

Using the GPH data below for comparison with the figures above, I used more fuel for the same period of time to accelerate the same speed over the same distance at 95% LOD.
0.004774444 sum gas used in pulse
19 # intervals 7.6 time to pulse
12/3/11 95% LOD P&G 25-40. 60 degrees, sunny, dry. Wind quartering rear 25-40 mph.

After I finished the 95% LOD runs, I played with some 10-25 mph P&G. Here are the results (sea level flat drive).
__________________
Darrell

Boycotting Exxon since 1989, BP since 2010
Have you ever noticed that anybody driving slower than you is an idiot, and anyone going faster than you is a maniac? George Carlin
Mean Green Toaster Machine
49.5 mpg avg over 53,000 miles. 176% of '08 EPA
Best flat drive 94.5 mpg for 10.1 mi
Longest tank 1033 km (642 mi) on 10.56 gal = 60.8 mpg

Last edited by SentraSE-R; 12-03-2011 at 11:50 PM..
  Reply With Quote
The Following User Says Thank You to SentraSE-R For This Useful Post:
mikeyjd (06-04-2014)