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The MSS70 DME has 3 main ignition maps.
Which one it will use depends upon many factors such as environmental factors, knock count etc.
This is probably one of the most sensitive DME's we have ever come across on an NA application and the dyno and road results can vary massively even on a stock car.
We are well aware of this from many years ago. In order for us to make the cars perform on a dyno we have to monitor inlet air temperature, coolant temperatures etc very carefully. Inlet temperatures for example are solely reliant on how good the cooling system is on the dyno setup and if the operator waits for the temps to drop.
You can have your stock car producing completely different graph shapes especially at the higher rpm's from one dyno session to the next. You will see a distinct dip in the power and many people think this is knock occurring. In fact this dip is caused by the safe ignition maps which have a huge dip in ignition timing in comparison to the optimal ignition map.
Many people have also experienced the AFR's being very lean up to a certain point and then suddenly rich.
For you to test these cars on a dyno you really need to data log.
This is a setup which adapts massively and continuously.
If any of you care to dig up graphs of these cars stock you will see the results all over the place. Often people think there is a problem with their engine or setup but this is not the case.
You must understand, this is not an E46 M3 where the DME does not have this level of continual adaption.
Education is required and we are more than happy to offer this. It will benefit those that will not even use our tuning also.
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