Anyone know MegaSquirt well?
I was tuning today for FE, and didn't notice that it only reads up to 15.7:1 AFR. I kept leaning out, and had to redo it. What I'm wondering is: shouldn't the guage in Megatune read up to 18:1, like the guage that came with the Dynojet wideband commander? I made sure that MS is set for the DynoJet.
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a friend of mine suggested this
https://www.msefi.com/index.php he also said that the megasquirt manual is available online (though it is big) |
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First get TunerStudioMS. Much more user friendly interface. https://www.efianalytics.com/TunerStudio/ Once you have your project open, right click in the middle of the screen, check the 'designer mode' box. Then right click on the gauge you want to change (in this case AFR) and select 'limits'. Its infinitely adjustable. good luck Justin |
Thank you tjts1.
I have the MegaManual printed out, and read it many times, since I don't understand half of it (the computer/ code part). Thanks, Justin, I'll do it! |
Thanks for the suggestion, Beef.
...so, I downloaded the tunerStudio, and it [basically] says it doesn't recognise my .msq file. I'm not savvy enough to convert it, or know what to do about it. Fortunately, I have a seperate AFR guage that I go by, but it's just disconcerting that MS doesn't read the same. I set the AFR to up to 17:1 at cruising, but I could feel a slight loss of power; almost stumbling, so I richened it up to about 16.5:1. I'm at 278 miles, and have about 2 gallons to go (to 10 gal.), so I should be at about my 35mpg goal, and that's about half city driving. :) |
You *might* be able to get rid of that stumbling by retarding your timing.
-BC |
Oh, yeah.. I'll try it. I got too focused on the fuel.
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I'll try again. I went to "new project" but didn't see an auto detect. Thanks again :)
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File, new project, 'detect' button.
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Cool! Thanks!
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Are you monitoring exhaust gas temperature? That may give you some insight into what to do with AFR and timing.
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Not yet... That is my next step. However, I don't know what my car's threshold is. It has polished combustion chambers (piston tops, valves..) so there shouldn't be any hot spots, but it is all aluminum (with steel sleeves, of course). The engine is built from the factory to withstand 7,000rpm, and tests had them up to 12,000 without failure, so I imagine they can withstand some heat.
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hmmm you'll have to do some research into that. I mean you'll probably not melt your exhaust manifold because something else would happen first like melting a piston. But the EGT can give you clues to how lean you can safely run, but who knows where the limit is until you reach it?
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