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status of 2 byte load?

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Old Mar 29, 2007, 12:31 PM
  #166  
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NJ,

In a thread somewhere. maybe this one, I posted the address for the MUT table in the 05 Rom and the addresses for the two byte load logging.

Maybe try patching your ROM and test it out?


Eric
Old Apr 1, 2007, 09:22 AM
  #167  
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Well, thanks to Eric I got the Rom patched and the ability to log the 2 byte load. I added the formulas to the logworks xml file and logged both the LoadCalc and the 2 byte load to see the difference.

In one of the logs I got a spike similar to the one Tephra posted about. But mine was at peak boost/torque. The other two logs I did were spikeless.

There is not that much of a difference in the numbers between the LoadCalc and the 2 byte load. The 2 byte load is in blue and the LoadCalc is in green. I am assuming that I did this correctly.

Attached Thumbnails status of 2 byte load?-2byte_loadcalc.gif  
Old Apr 1, 2007, 03:14 PM
  #168  
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I finally had a chance to do a thorough comparison between 2-byte load and LoadCalc.

Below are the results of 5 logs that I did between yesterday and today. They are done at the same place and under somewhat similar weather conditions. The horizontal axis is the 2 byte load (ECU_Load) and the vertical axis is the rpm. The chart content is the LoadCalc. The numbers in the hexes are averaged and not the Maximum numbers.

You will note that the differences between LoadCalc and the 2 byte load ar not that large. At around 3500-4000 rpm the differences are bigger between the two loads, but as the rpms increase the differences decline.

Attached Thumbnails status of 2 byte load?-2byte_loadcalc_5.gif  
Old Apr 1, 2007, 04:33 PM
  #169  
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If you use the sliding latency formula based on battery voltage, you may find you can narrow that down to be a bit more accurate.
Old Apr 1, 2007, 04:48 PM
  #170  
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Originally Posted by MalibuJack
If you use the sliding latency formula based on battery voltage, you may find you can narrow that down to be a bit more accurate.
Is the current xml LoadCalc formula in Mitsulogger using a sliding latency formula based on battery voltage?
Old Apr 1, 2007, 05:11 PM
  #171  
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Yep, it should be in the newest release 1.6 beta 3...
Old Apr 2, 2007, 04:41 PM
  #172  
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Originally Posted by nj1266
Is the current xml LoadCalc formula in Mitsulogger using a sliding latency formula based on battery voltage?
FWIW, I posted one variation of this somewhere for LogWorks (sorry, I've been in round the clock product wrapup and am having a brain poot about where I posted it).

-jjf
Old Apr 2, 2007, 05:05 PM
  #173  
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Originally Posted by jfitzpat
FWIW, I posted one variation of this somewhere for LogWorks (sorry, I've been in round the clock product wrapup and am having a brain poot about where I posted it).

-jjf
jjf is this it?

http://www.innovatemotorsports.com/f...&postcount=110

At that time the Evoscan formual was the one to sue Battery voltage. Now MJ is using it in his logger as well.

Here is the formula

?Injector Scaling = inj_scale[513]
?i Name of Battery Voltage channel = battery[Battery_Voltage]
?i Name of Injector Pulse Width channel = inj_pulse[Fuel_Injector_Pulse_Width]
?i Name of AFR MAP channel = afrmap[AFR_MAP]

# injector latency
inj_latency = (-0.1026*battery)+1.8741

# engine load
calcload = 5 * inj_scale * (inj_pulse - inj_latency) / afrmap
MC(LoadCalc;%;0;500) = calcload

MJ is this the same as the latest one you have in your logger.
Old Apr 3, 2007, 08:43 AM
  #174  
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For those confused by the last 12 pages of this post, read this: https://www.evolutionm.net/forums/sh...92&postcount=1

Last edited by Titanium; Apr 3, 2007 at 08:51 AM.
Old Jul 11, 2007, 12:15 AM
  #175  
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Hey MalibuJack, great work with MitsuLogger and all the other info you've contributed. I was looking at the Load Ignition and Load2 AFR in the requestID.xml file which use RequestID's 00 and 01, which I also use for the 2 byte loads. The Load Ignition and Load2 AFR by default are not logged. Is it ok for me to leave those in the file and also my 2 byte load request ID's, also 00 and 01, or will there be a conflict? If so, I will just comment out one or the other. Thanks!
Old Jul 11, 2007, 09:10 AM
  #176  
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Originally Posted by nj1266
You will note that the differences between LoadCalc and the 2 byte load ar not that large. At around 3500-4000 rpm the differences are bigger between the two loads, but as the rpms increase the differences decline.
I'm wondering why anyone cares about LoadCalc anymore when we have 2-byte..? It's true that LoadCalc is pretty accurate on relatively stock cars, but still...why not just log the real load value and call it done?
Old Jul 11, 2007, 09:29 AM
  #177  
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Originally Posted by Pd1
I'm wondering why anyone cares about LoadCalc anymore when we have 2-byte..? It's true that LoadCalc is pretty accurate on relatively stock cars, but still...why not just log the real load value and call it done?
Got to agree with you 100%. I haven;t logged load calc since I got the 2 byte working. I did use it too the loadcalc to see difference with the cams since I didn't have any logs of the car without cams with 2 byte. Besides that I dont check it anymore at all
Old Jul 11, 2007, 09:51 AM
  #178  
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Originally Posted by Pd1
I'm wondering why anyone cares about LoadCalc anymore when we have 2-byte..? It's true that LoadCalc is pretty accurate on relatively stock cars, but still...why not just log the real load value and call it done?


the calculated load is helpful when you are logging an EVO with an unknown ROM ID.
Old Jul 11, 2007, 10:09 AM
  #179  
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Originally Posted by chrisw
the calculated load is helpful when you are logging an EVO with an unknown ROM ID.
Just flash it with a known ROM with 2-byte enabled.

Seriously, I hadn't thought of that. I guess it does have value in some circumstances.
Old Jul 11, 2007, 10:20 AM
  #180  
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Originally Posted by Pd1
Just flash it with a known ROM with 2-byte enabled.

Seriously, I hadn't thought of that. I guess it does have value in some circumstances.

How will that work, if roms are mated to their ecu and have diff addresses for diff things?


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