Better gas mileage with K04?!
02-13-2009, 07:26 AM
#11
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You can't tweak it more than 15%
Mine has been wrong ever since my big injector GIAC file was flashed. K04 file has same problem (same injectors). It's calculating based on duty cycle of the 250cc or whatever the stock injector is, so when the 380cc injector's duty cycle is used, the numbers are of course way off. I have my correction maxed at 15% and it still claims I get 6-7L/100km on the highway, when in actual fact I'm getting 9-10L/100km
Yes, stupid Metric fuel economy calcs too. Don't know why km/L isn't a standard, instead of L/100km. How arbitrary.
Yes, stupid Metric fuel economy calcs too. Don't know why km/L isn't a standard, instead of L/100km. How arbitrary.
02-13-2009, 07:32 AM
#12
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Instruments (17) adaptation channel 3 by the way
Range 85-115<ul><li><a href="https://forums.audiworld.com/a4gen2/msgs/1099852.phtml">https://forums.audiworld.com/a4gen2/msgs/1099852.phtml</a</li></ul>
02-13-2009, 10:29 AM
#14
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17 - Instruments, Adaption 10, Channel 03
On my last tank my trip computer displayed 27.5 mpg and actual measured came in at 27.8 mpg. So the 10% correction seems perfect. However, I am not running my 380cc injectors yet.
To change it go to:
17 - Instruments
Adaption 10
Channel 03
100 is the base value. You can make adjustments in 5% increments. Increasing the value reduces the gas mileage displayed on your trip computer. I increased the base value to 110. (You can also lower this value). The permissible range is 85 to 115. With the 380cc injectors I would try 110 or 115 and see which is more accurate.
To change it go to:
17 - Instruments
Adaption 10
Channel 03
100 is the base value. You can make adjustments in 5% increments. Increasing the value reduces the gas mileage displayed on your trip computer. I increased the base value to 110. (You can also lower this value). The permissible range is 85 to 115. With the 380cc injectors I would try 110 or 115 and see which is more accurate.
02-13-2009, 12:12 PM
#17
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right, sorry 36# versus 26# is about 1/3 bigger at same duty cycle
The stock 26# injectors are good for about 170 Hp. The 36# can go to about 230 Hp at an 80% duty cycle. Even with the oem injectors at 95% duty cycle, they are only good for 200 Hp.
02-13-2009, 12:28 PM
#18
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What's your calc?
You're doing sqrt(380)/sqrt(280)?
I think it's linear. Duty cycle of injectors to flow x cc's of fuel will be 1.36 times higher for 280cc vs 380cc, no? If I want to flow 38cc of fuel, it takes 0.1s for the 380cc vs 0.136 for the 280cc.
My adjustments to the adaptation channel seem to bear this out, as I've adjusted it up by 15% and I'm still more than 20% off, readout to actual.
I think it's linear. Duty cycle of injectors to flow x cc's of fuel will be 1.36 times higher for 280cc vs 380cc, no? If I want to flow 38cc of fuel, it takes 0.1s for the 380cc vs 0.136 for the 280cc.
My adjustments to the adaptation channel seem to bear this out, as I've adjusted it up by 15% and I'm still more than 20% off, readout to actual.
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