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Old 06-27-2008, 10:44 AM   #1
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Default MLV AFR target table problem

My HD on my laptop crashed so I had to get a new one and reinstall everything. I reinstalled Megatune and MLV. For some reason when I change my afr targets I get a message that says "This is a read only table. If this table is edited, the new values will be used for analysis, but will not be saved with MSQ". Prior to having to reinstall everything my target afr's would automatically be saved. What do I do?
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Old 06-27-2008, 12:23 PM   #2
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might be a new feature if you downloaded the newest MLV.

I actually like that idea. Sometimes I tweek the table for a specific reason and then run the analyzer. This way you can make certain changes to the table without messing up the table inside your MSQ.

however, FWIW, you should use the default AFR table in MLV only....much better resolution.
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Old 06-27-2008, 12:29 PM   #3
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Quote:
Originally Posted by Braineack View Post
might be a new feature if you downloaded the newest MLV.

I actually like that idea. Sometimes I tweek the table for a specific reason and then run the analyzer. This way you can make certain changes to the table without messing up the table inside your MSQ.

however, FWIW, you should use the default AFR table in MLV only....much better resolution.
Can you explain. The default afr target table in MLV would make me run really rich in cruise.
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Old 06-27-2008, 12:35 PM   #4
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well you gotta change the numbers



I use something close to this.
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Old 06-27-2008, 02:04 PM   #5
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Im a dumass, I got it figured. Thanks.
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Old 06-27-2008, 02:43 PM   #6
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I've been using the 8X8 AFR target table in the MSQ all this time, and saving it with the MSQ. I think I may try the MLV table instead for the improved resolution and the 1:1 matchup with the VE table cells.

So are you running open loop? If you were running EGO correction then one would have to port the 12x12 MLV AFR table to the MSQ 8X8 table somehow. Presumably that would be a manual operation, perhaps using Excel to form a corresponding map. Maybe it could be a simple as just removing some rows and columns if the pressure rows and RPM columns matched up except for four rows and columns (interpolated) that did not match.

Last edited by ZX-Tex; 06-30-2008 at 11:10 AM.
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Old 06-30-2008, 10:02 AM   #7
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Tex, I dug up a rather good bit of kit for interpolating AFR tables, excel itself only does linear interpolation but this does good hyperbolic work. Ill give it a test and see how easy it is to use. If you want to have a look http://trilookup.trimill-industrial-....qarchive.org/
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Old 10-10-2008, 09:49 AM   #8
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Any updates on this? I am using the default AFR table in MLV but it doesn't match up exactly with the table in the MSQ and I'm not exactly sure how to fix it.

If the VE is tuned with a different table than the EGO correction is using, the EGO correction will always be freaking out.
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Old 10-10-2008, 11:33 AM   #9
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Not sure how I missed this thread the first time around, but a question: Why would you want MLV to be using anything other than the 8x8 afrBins1 table from the MSQ file? And don't say "extra resolution." Why do you need more resolution that 8x8 for AFR targets? Only Imperial troops are so precise.

I'm apparently of the same mind as SkiDude on this- you're just creating extra work for EGO by tuning to a different table than you run on.
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Old 10-10-2008, 12:15 PM   #10
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I started using the MLV table because my map while cruising on the interstate was between two rows in the table, one which was about 15 and the other which was 13.6, so it was tuning my cruise cells to high 13s giving me very poor fuel mileage. A simpler solution seems to be just changing the MSQ table a little.
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Old 10-10-2008, 07:59 PM   #11
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Well... yeah! If your AFR Targets table is wacky, then fix the AFR targets table. Even if your VE table is perfect, if the AFR Target for a cruise zone is too rich, then gEGO is going to do its best to make sure that you're running too rich in cruise.

This map produceth not over-richness at cruise, nor over-leanness when power be called for. It's both my daily-driver table and what I use in MLV to refine the VE table:


"One Table to Rule Them All!"
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Old 10-11-2008, 08:46 AM   #12
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I have EGO turned off so I am not creating extra work for the processor.

Is there a consensus that an AFR of 13.5 is safe at 3.5lbs of boost as your table calls for below 4000rpm Joe? I was under the impression we should have a bit more fuel in that area but am curious what most others think.

Last edited by paul; 10-11-2008 at 09:17 AM.
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Old 10-11-2008, 09:25 AM   #13
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Did a lil googling and it does seem pretty common to run that lean of an AFR at 125-130kpa. I think I'll adopt it and go retune. I've been tuning to a 12.3AFR at 128kpa and a 13-13.5AFR at 101kpa.
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