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Old 01-26-2014, 06:34 AM   #1
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Default My issues your help

Hi all,
I would like to share with you my project Supercharged Miata,
Year of build 2004
Year of supercharged 2013, from Mercedes compressor, the bypass of the charger is linked to throttle position so for the initial tuning outside outside of equation.
I have no cooler for the charger
I have AEM UEGO wideband lambda that is working in narrowband option (I want to swap original the ECU during tuning)
I have a MAT sensor calibrated for mega
Goal is to have standalone ECU on Mega 2.
What was done:
- Alternator is working
- Fan is working
- Tachometer is not because I made it on 5V
- I have working idle on cold and hot engine

Questions:
-how to manage AFR on idle?

Currently the display is showing 12, the mega is 12 but in AFR table all around and the cell where I am are 15.

Attached is the curent tuninig file
Attached Files
File Type: zip 2014-01-26_12.31.18.zip (9.0 KB, 8 views)
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Old 01-26-2014, 10:08 AM   #2
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Im not flaming you but your English is rather hard to understand. Also your references are hard to understand. Is mega2 a MSPNP2 or MS2 or a variant of MS2 (microsquirt, diypnp) or entirely something else?

Either way I don't think you have done any kind of research on making adjustments to an adjustable ecu to get the desired results. It looks like English is not your native language so I understand if reading through the numerous online manuals is tough. Maybe your browser could translate it well enough to understand since a lot of the terms used in the manuals may not directly translate to what you are used to.

Having said that, your AFR table does not command your AFR. It is used by the ecu when in auto tune or ego control to correct to the desired AFR in the AFR table. Having the uego in wideband mode would be a plus.
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Old 01-26-2014, 10:25 AM   #3
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Thank you. yes you are right English is not my native language. Also my tuner vocabulary is not the best, but I want to wean how to tune myself rather to give it to garage to do it instead of me. Of course at the end I will have a dyno session for fine adjustments over atmospheric pressure.

the board is MS2Extra Rel 2.1.0q

With your statement "your AFR table does not command your AFR" I have additional question what is commanding how much fuel to put in "Speed density" mode?

and next question is

How to guess what to put in the VE table?
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Old 01-26-2014, 10:34 AM   #4
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You answered your own question. The VE table controls how much fuel is injected if no other factors are being added to it. The number is just a number so don't pay too much attention to it. Higher number is more fuel. So for a properly warmed up engine at steady throttle, the VE table is the fuel calculation used to inject fuel.

The VE table is your base fuel and there are many things that can be added to it to richen the mixture. So go read and find out what else can get added to it.
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Old 02-09-2014, 04:11 AM   #5
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Thaks,
Idle is under control (based on VE and Advance tables). I am playing with warm-up enrichment to fine tune starts. Outside is 0 C.
the problem I am facing now is the transient process form idle to full throttle. Car is on neutral and if I press the pedal with normal speed the car is stalling, because AFR become very lean (the acceleration enrichment is off for tuning). If I am doing it very slowly (like 5-10 sec to reach 50% TP) engine is accelerating normally AFR is around 13-13.5. On driving condition, if the ca did not stall in the beginning, there is normal acceleration. What to tune, should I enable acceleration enrichment? In this case is there influence on VE table process of tuning?
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