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Old 03-25-2014, 08:33 PM   #17 (permalink)
jedi_sol
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Join Date: Mar 2009
Location: Tustin, CA
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2013 STi *SOLD* - '13 Subaru Impreza WRX STi
Subaru
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90 day: 26.59 mpg (US)

1996 Geo Metro *RETIRED from Ecomodding* - '96 Geo Metro Base
90 day: 58.68 mpg (US)
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Data Logging...theory %50 confirmed?

Here are the graphs of the data logging I did with Torque App last night. It pretty much 50% confirms my theory is valid ( I still want to hook up my MPGuino and Voltmeter to the injectors to be 100% sure).

It appears that the engine goes into DFCO for a split second when I step off the throttle (red circle). Throttle position goes down…fuel flow drops to 0 and instant mpg jumps up.

Then I keep blipping the throttle to extended the DFCO event for longer periods of time. Fuel flow drops down to 0 and instant mpg jump up to 255mpg (the max Torque App displays)


Thoughts? Comments? Constructive Criticisms

I also did more ABA testing.

I changed up my testing method to eliminate more variables. This time, I drove up to 50mph, shifted to neutral to coast, then when I hit 40mph, I hit RESET on Torque, then when I hit 20mph, I hit RESET AGAIN. This way, I only measure the amount of fuel used while coasting. I eliminate the variable of my foot accelerating too hard.

I also measured using 6 decimal spaces, to allow more accurate detail in fuel used.

A1 Runs – Straight neutral coasting from 40mph down to 20mph
0.003973
0.003607
0.003754
0.003500
0.003657
0.003907
A AVERAGE – 0.003733 gallons/fuel used

B Runs – Blipping throttle while coasting from 40mph down to 20mph to simulate EOC event
0.0015200
0.0007780
0.0001470
0.0009400
0.0007230
0.0006480
B AVERAGE – 0.0007926 gallons/fuel used

A2 RUNS
0.003673
0.003458
0.003368
0.003382
A2 AVERAGE – 0.00347 gallons/fuel used

A averages – 0.00362 gallons used
B averages – 0.0007926 gallons used

78.11% improvement over traditional P&G

Obviously, using straight EOC will yield better results.

I also data logged Air/fuel ratios too if you guys want to see that graph.
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See the rest of the Sti project log:
http://ecomodder.com/forum/showthrea...log-26612.html
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WilliamYH09 (03-25-2014)