alpha-n qestion, when using alpha-n, you have your tps x rpm table, and fill in fake kPa values, when megasquirt looks at what kPa to reference in the VE table, what rpm column does it also go to? does it follow the same rpm as made in alpha-n table?
example:
tps 50%.................50kpa
rpm........800..........1200
in the VE table, I know it looks at the 50kpa on the left, but which rpm column does it go to? the first one or my 1200 rpm column to get the proper VE?
alpa-n question
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Read the manual to see if your question is answered there before posting. Many users will not reply if the answer is already available in the manual.
If your question is about troubleshooting, configuration, or tuning, you MUST include your processor type (MS-I or MS-II) and code version in your post. If your question is about PCB assembly or modifications, you must also include the main board version number (1.01, 2.2 or 3.0). For tuning/troubleshooting questions, please attached a datalog and your MSQ file to your post.
If you have questions about MS1/Extra or MS2/Extra code configuration or tuning, please post them at www.msextra.com Such questions posted here will be moved to: a temporary MSextra sub-forum, where they will be removed after 7 days
The full forum rules are here: Forum Rules, be sure to read them all regularly.
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Matt Cramer
- Super Squirter
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- Joined: Sat Jul 03, 2004 11:35 am
Re: alpa-n question
It goes to the column that represents the real RPM.
Re: alpa-n question
cool! if my alpha-n rpm column points (800-1200-1600etc) dont match my ve table rpm points (600-900-1200-1500)
does it interpolate a ve number between the two closest rpm cells?
does it interpolate a ve number between the two closest rpm cells?
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Matt Cramer
- Super Squirter
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- Joined: Sat Jul 03, 2004 11:35 am
Re: alpa-n question
Yes, like other tables, they're interpolated.
Re: alpa-n question
thank you matt, I did a test last night in which in my alpha-n table, i set my the cell my engine idles in to 20kpa, and on my vetable, at 20kpa, and the correct rpm, i set it around 47ve which my engine idles at with the map just fine, but with alpha-n enabled, it does not idle at all unless i raise my alpha-n idle cell to 65kpa, but in my ve table the 65kpa and 20kpa have the exact same VE numbers.
i can post pictures if this does not clarify
i can post pictures if this does not clarify
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loren
- Helpful Squirter
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Re: alpa-n question
You've got to retune your VE table after you go Alpha-N, or anytime you make changes to the Alpha-N TPS table.
To get it to idle, you need to set whatever cell(s) in the VE table correspond to ACTUAL RPM, and FAKE MAP to the value that is appropriate for idle. So, it sounds like you need to make note of the VE value at 65 kPa (your S/D idle bins) and copy those values to whatever kPa bins you have set for the idle rpm range at zero TPS.
Once you get it to idle, you'll need to run through the whole autotune process just as if you were starting from scratch.
To get it to idle, you need to set whatever cell(s) in the VE table correspond to ACTUAL RPM, and FAKE MAP to the value that is appropriate for idle. So, it sounds like you need to make note of the VE value at 65 kPa (your S/D idle bins) and copy those values to whatever kPa bins you have set for the idle rpm range at zero TPS.
Once you get it to idle, you'll need to run through the whole autotune process just as if you were starting from scratch.
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