Möbius build 3.0 : Crash testing Miatas like he works for the NHTSA
09-30-2017, 10:34 AM
#303
Tweaking Enginerd
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You should probably start out by explaining what things are before nonchalantly suggesting that people make drastic changes to it parts of their tune.
Also no need to do any sort of margin. It's an equation. You can come up with the exact same table as you started with by doing some math. No need to guess.
Also no need to do any sort of margin. It's an equation. You can come up with the exact same table as you started with by doing some math. No need to guess.
I apologize.
Mobius, I suggest that you investigate the IncorporateAFR function as a potential tuning tool/enhancement. Use this forum and others to understand what it does, how it works and what changes will be required.
The margin is intended to place you on the rich side prior to autotuning. One of, if not the biggest advantages of the IncorporateAFR function is that it provides you with a VE table that is actually representative of the air pump efficiency. Fueling tables that do not utilize AFR target in the fueling equation have a tendency to mask errors. If the masked errors are in the offset portion of the equation (such as injector dead time), the initial scaling of VE with incorporateAFR prior to autotuning may back out some of the fuel that was added to compensate for these errors. There will also be errors introduced in the calculation due to rounding/significant figure limitations. Margining rich is the safe way to go IMO.
better?
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09-30-2017, 06:47 PM
#304
Elite Member
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Join Date: May 2008
Location: Portland, Oregon
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I'll research this as I still do not understand what I need to do to recalculate my VE table to get it close-ish to what it should be and let autotune then work on it. I'm meeting with Curly tomorrow morning anyway for precisely this kind of stuff as well as a general going over of the car.
I'm confident my current as is ve table will be providing enough fuel, at least to 7-8psi.
Math doesn't scare me; I simply don't know it at the moment.
I'm confident my current as is ve table will be providing enough fuel, at least to 7-8psi.
Math doesn't scare me; I simply don't know it at the moment.
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