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How to read an MHD log
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02-20-2018, 02:43 PM | #1 |
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How to read an MHD log
When I had JB4 with a BEF I was able to somewhat understand the logs enough to know that something was amiss, but not necessarily know what was. Now that I am on MHD I'd like to be able to look at the logs and be somewhat confident in what I am looking at. Then if something looks out of kilter I can then ping the big dogs.
Can someone come up with an N55 primer for basic MHD log analysis ala the Terry JB4 writeup over on N54Tech? We could post it as a sticky note for reference. |
02-20-2018, 05:14 PM | #3 |
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02-20-2018, 06:12 PM | #4 |
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maybe i am the only one but the MHD logs are sooo self explanatory if you have basic engine knowledge. If you dont know how an engine works then you would have a hard time..
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02-20-2018, 06:26 PM | #5 | |
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Plus the fact that this engine is so adaptive to its current conditions, I think reading the logs at first is a little daunting. Quick learning curve though. Once you know what your looking at and for it's easy.
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02-20-2018, 09:04 PM | #6 |
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I rebuilt an engine at 16, and it ran fine. On the ASVAB the test said I was best suited to be an automotive engineer. Basic enough? While I don't tinker (I don't need to in order to have this car) I'd still like to be able to read the logs myself so I don't blow it up. With JB4 it said to look for advance and a dish shape in the higher rpms when things were going ok. With my limited time with MHD it seems that they should stay at 0(?). Id prefer to see the advance as it happens. With JB4 there was an AFR column it looks like for MHD it is Lambda. I'll look at the info provided upthread and go from there.
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02-20-2018, 09:57 PM | #7 | |
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I'm pretty sure that the actual timing value is listed as "timing cyl. 1 *CRK." Maybe that will give you the numbers you're looking for. |
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02-21-2018, 01:44 PM | #8 | |
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So what i STILL dont understand is what you are trying to accomplish. The logs are easy to read so that you can solve potential performance issues. If you are trying to tune your car thats a completely different ball game. |
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02-21-2018, 04:00 PM | #9 |
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Thank you bcaz, rich... that is a well written explanation. Is enough to at least be dangerous. Pladi, no offense but how the MHD logs are labelled and interpreted, specifically timing and AFR (I see that is "Lambda"), is different than the JB4 solution.
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