MegaSquirt self learning mode?
09-25-2009, 10:58 AM
#1
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MegaSquirt self learning mode?
Hi all
Once again my apologies for what might be a redundant or dumb question, but here goes...
I went for a drive tonight with the stock ECU running the show while the MS1 setup to log all the various inputs etc so I can keep a reference of what the stock ECU does. Makes me wonder if there's a way the MS can be set to learn / mimics how the stock ECU behaves, self learning sort of speak, I realized there's an auto tune feature built into the MS but have heard that it's not as good as it sounds.
Mine's a stock motor with mild engine mods (Cams, exhaust, intake) so I find the stock ECU is quite safe for the setup, I'd like to be able to start out with this tune and slow work my way around. Currently I have no confidence in the MS at anything other than cruise mode.
I'm sure if I was to manually track through the log via MLV I'll be able to come up with an AFR target table, but seems redundant.
Is there a way in MLV / MegaTune to say "Use this log to setup my AFR target table, Timing and whatever else useful" ?
Would be pretty nice!!
Here's the log of my stock ECU...
Once again my apologies for what might be a redundant or dumb question, but here goes...
I went for a drive tonight with the stock ECU running the show while the MS1 setup to log all the various inputs etc so I can keep a reference of what the stock ECU does. Makes me wonder if there's a way the MS can be set to learn / mimics how the stock ECU behaves, self learning sort of speak, I realized there's an auto tune feature built into the MS but have heard that it's not as good as it sounds.
Mine's a stock motor with mild engine mods (Cams, exhaust, intake) so I find the stock ECU is quite safe for the setup, I'd like to be able to start out with this tune and slow work my way around. Currently I have no confidence in the MS at anything other than cruise mode.
I'm sure if I was to manually track through the log via MLV I'll be able to come up with an AFR target table, but seems redundant.
Is there a way in MLV / MegaTune to say "Use this log to setup my AFR target table, Timing and whatever else useful" ?
Would be pretty nice!!
Here's the log of my stock ECU...
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09-25-2009, 11:37 AM
#3
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I know where you're coming from hustler, it cost quite a bit to tune so I'd only want to tune it once I've all that needs doing, possible FI of some sort...shhhh!!!...other half is sleeping (it's 1:35am here in Aus)...she can't know I'm spending more on the car :(. But in the mean time I'd like to start getting to know the MS but trying to do it as safe as possible.
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09-25-2009, 11:47 AM
#4
Boost Pope
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Location: Chicago. (The less-murder part.)
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Not if you do it on the street with a WBO2.
Step 1: Steal somebody else's MSQ (or use the DIYAutoTune base maps) and make sure your AFR Targets table is as you desire it to be.
Step 2: Give gEGO a broad authority and a fast response time.
Step 3: Start the engine. Make initial coarse corrections by hand.
Step 4: Datalog. Use MLV to auto-correct the VE table (use VEX export / import) and then push the modified VE table back into the MS.
Step 5: Repeat step 4.
Step 6: Repeat step 4.
Step 7: Slow down gEGO a bit, and repeat step 4.
etc.
Step 1: Steal somebody else's MSQ (or use the DIYAutoTune base maps) and make sure your AFR Targets table is as you desire it to be.
Step 2: Give gEGO a broad authority and a fast response time.
Step 3: Start the engine. Make initial coarse corrections by hand.
Step 4: Datalog. Use MLV to auto-correct the VE table (use VEX export / import) and then push the modified VE table back into the MS.
Step 5: Repeat step 4.
Step 6: Repeat step 4.
Step 7: Slow down gEGO a bit, and repeat step 4.
etc.
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09-25-2009, 12:18 PM
#7
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Location: Southern Indiana
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Not if you do it on the street with a WBO2.
Step 1: Steal somebody else's MSQ (or use the DIYAutoTune base maps) and make sure your AFR Targets table is as you desire it to be.
Step 2: Give gEGO a broad authority and a fast response time.
Step 3: Start the engine. Make initial coarse corrections by hand.
Step 4: Datalog. Use MLV to auto-correct the VE table (use VEX export / import) and then push the modified VE table back into the MS.
Step 5: Repeat step 4.
Step 6: Repeat step 4.
Step 7: Slow down gEGO a bit, and repeat step 4.
etc.
Step 1: Steal somebody else's MSQ (or use the DIYAutoTune base maps) and make sure your AFR Targets table is as you desire it to be.
Step 2: Give gEGO a broad authority and a fast response time.
Step 3: Start the engine. Make initial coarse corrections by hand.
Step 4: Datalog. Use MLV to auto-correct the VE table (use VEX export / import) and then push the modified VE table back into the MS.
Step 5: Repeat step 4.
Step 6: Repeat step 4.
Step 7: Slow down gEGO a bit, and repeat step 4.
etc.
Is there an easy way to just export the vex without closing megatune, opening the map offline, exporting, closing megatune, and importing the vex?
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09-25-2009, 12:25 PM
#10
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Never need to go offline to load VEX or MSQ, my MS is configured for Inverted Spark though (Awesome mod btw Joe Perez
)
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09-25-2009, 12:34 PM
#15
Boost Pope
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Location: Chicago. (The less-murder part.)
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Assuming you are doing this in realtime, with both MT and MLV on the same machine:
1: Open MT.
2: Start a datalog, and drive.
3: When finished, stop the log, and save the MSQ.
4: Open MLV.
5: Within MLV, import the log and the MSQ and perform the analysis.
6: Within MLV, export the modified VE table to a .VEX file.
7: Switch back over to MT, open the VE1 window, import the VEX, burn it, and close the VE1 window.
8: Goto 2.
1: Open MT.
2: Start a datalog, and drive.
3: When finished, stop the log, and save the MSQ.
4: Open MLV.
5: Within MLV, import the log and the MSQ and perform the analysis.
6: Within MLV, export the modified VE table to a .VEX file.
7: Switch back over to MT, open the VE1 window, import the VEX, burn it, and close the VE1 window.
8: Goto 2.
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09-25-2009, 12:47 PM
#16
Tour de Franzia
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Location: Republic of Dallas
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just get the fuel table/enrichments/idle/cold start right, then go to a steady-state dyno and tune spark, its not hard. This is discussed ad nauseam in the DIY instructions.
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09-25-2009, 03:51 PM
#17
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I saw one guy on another forum who managed to capture his stock ECU's timing map by driving around with a timing light and web cam zip tied under his hood. I'm not entirely sure why you would want to log the stock ECU's timing curve in a Miata when there are a lot of good timing base maps out there, however.
Logging the stock timing map or fuel map would require extra IRQ pins that are not available in the MegaSquirt processor. Although I suppose somebody with enough determination could make a signal that converts duty cycle to a voltage and log it through a spare ADC.
Logging the stock timing map or fuel map would require extra IRQ pins that are not available in the MegaSquirt processor. Although I suppose somebody with enough determination could make a signal that converts duty cycle to a voltage and log it through a spare ADC.
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