Quote:
Originally Posted by Formula413
As to why the correction factor seems to change, that's a good question. ... Does anyone know exactly how the SGII comes up with it's fuel usage estimate?
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Aha! I think your question solved the riddle.
The SG calculates fuel consumption based on air consumption, and extrapolates fuel use with a formula based mostly on
stoichiometric air-fuel ratios.
But I've changed my driving style. I used to do a LOT of pulse & glide (P&G), but now I mostly drive with load (DWL). In the Metro, P&G consists of a lot of non-stoichiometric, open loop acceleration. DWL keeps me in closed-loop stoich mode almost all the time.
So, the ScanGauge probably didn't know what the rich burn rate was/is, and obviously it was guessing wrong. It was underestimating it, which is why the offset that worked best when I was doing lots of P&G was +8%.
Also: maybe Linear Logic updated the SG's formula between versions? I've also gone from SG1 to SG2 since I first figured out that +8% offset.
Anyone else upgraded and noticed any difference?
Good reason to use a MPGuino.