Quote:
Originally Posted by proporsche
So Andrew ,you are saying by unpluging the Oxy sensor you lose performance?
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No - I said clearly with using the ECU running flawlessly he won’t loose any performce. You simply interprete my words in another way.
And with the lambda system deactivated and running in open loop mode they run ok, but in terms of combustion and efficiency they do not run „perfect“ as perfect means optimum. There’s only one non optimal thing with the original ECU : with closed loop control and lambda regulation active, on high load the ECU enriches from approx 40-50% in stoich resulting duty cycle to 65% duty cycle where in some cases this is not resulting in lambda 0.85 for optimum performance. But honestly this is also the case when choosing your approach. As with a disconnected sensor and therefore with open loop mode, on high engine load it behaves exactly the same, as here also it switches to static 65% duty cycle. Means exactly same enrichment.
Sure on lambda based k-jet setups where sensor or anything else related is not working correctly, this will result in less power, where then deactivating the system gives a better performance. But it’s not the optimal solution.
All is explained in the article „lambda control“ on my website above.
https://nineelevenheaven.wordpress.com/the-lambda-control-of-the-911-sc/