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AndrewCologne AndrewCologne is online now
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Join Date: Aug 2015
Location: Cologne / Germany
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Quote:
Originally Posted by Sub8 View Post
Yes that exactly what I meant!
Let the CIS give you lambda 1 and your box allows everything (well almost) that you would want a 3D mappable solution to do without any of the hassle.....
With a narrowband sensor you can only hit the lambda 1 ballpark as it only provides you the "spot on Lambda 1 window" signal within 0.1 and 0.9 Volt.
So with this sensor in regular the lambda 0,85, needed for Acceleration, can only be guessed but I found out how much more duty cycle is needed for a proper hit. The "static 65% duty cycle way" often results far off and for shure with a factory initial CO setting of 0.4 - 0.8% Vol. at 50% duty cycle.

Your wanted approach can be achieved with the wideband sensor, but also here for a functional "pseudo mapping" many more signals must be read like the rpm one from the speedometer/CDI, a manifold vacuum sensor signal etc etc. This is possible but makes the unit very user specific addressed, means a typical 911 DIY "make the best of it" user who is very in mechanics electrics etc. ... lets see :-)

I already temporarely used the rpm signal in the ECU for playing a bit with it – i.E. switching the FV off when deaccelerating – the whole SSIs changed into a nice popping beat box animal which sounded like hell – well at least for 911 sound freaks heroes


Quote:
Sorry for thread hijack!
I think Funracer will forgive us :-)
As its still dealing with Dwell, Duty Cycle, ECU and more
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911 SC 3.0, 1982, black, US model – with own digital CPU based lambda ECU build and digital MAP based ignition control

All you need to know about the 930/16 and 930/07 Lamba based 911 SC US models:
https://nineelevenheaven.wordpress.com/english/
Old 06-04-2020, 08:23 AM
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