I have a 173 box in my '87 325is and i am using an SMT6 piggyback unit. I was curious if the motronic box attempts to correct the A/F mixture at all to achieve a 14.7 AFR or whatever.
I'm just worried that I would be fighting motronic if i'm trying to tell it to give more fuel and it doesn't want to.
I think i heard somewhere that at WOT, the O2 sensor is ignored... is that true?
Also, as an additional question, i just wired the SMT to control my ignition timing. I am able to advance or retard 12 degrees with a throttle/rpm map. What kind of numbers should I be working with? Is there some kind of general rule (eg, advance with higher rpms or something like that). I know with tuning the AFR, i'm trying to get the mixture to around 13:1, what am i aiming for when i do timing modifications?
I'm just worried that I would be fighting motronic if i'm trying to tell it to give more fuel and it doesn't want to.
I think i heard somewhere that at WOT, the O2 sensor is ignored... is that true?
Also, as an additional question, i just wired the SMT to control my ignition timing. I am able to advance or retard 12 degrees with a throttle/rpm map. What kind of numbers should I be working with? Is there some kind of general rule (eg, advance with higher rpms or something like that). I know with tuning the AFR, i'm trying to get the mixture to around 13:1, what am i aiming for when i do timing modifications?
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