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Post by BikeTuna on Oct 11, 2018 8:32:39 GMT
My ME221 powered turbo is running a basemap and is overfuelling hugely. Frankly, I don't have the £300 to get it on a proper rolling road.
Is there another way in the short term? is there a self learning mode I can put on in the meantime?
Does anyone have a rolling road and want some practice?  |
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Post by schercheeroo on Oct 11, 2018 11:57:20 GMT
How much dyno time do you get for £300? With regard to the self learning mode, yes there is. It's under tools, enable autotune. But you need to be smart when using this, there's a configuration for it also under tools. I suggest you read the tuning manual available here; motorsport-electronics.co.uk/support/You want the "ME221 ECU software guide". I think you should question why the base map would be so far out though. Are all of your engine details correct? I would double check the injector size and engine displacement, and check calibrations on all sensors (air temp, coolant temp, manifold pressure, o2 sensor). Might be worth giving your location. There could be someone from here that lives near you that would be willing to help you out. |
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Post by BikeTuna on Oct 12, 2018 11:35:15 GMT
I'm in Oxfordshire, but if anyone wants to have a look at it then they are more than welcome... I'll drive most places
Cheers
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jon
Chats A Lot
Posts: 270
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Post by jon on Oct 12, 2018 13:10:56 GMT
Do you have a wideband fitted?
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Post by BikeTuna on Oct 12, 2018 15:07:20 GMT
Yep, AEM one
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jon
Chats A Lot
Posts: 270
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Post by jon on Oct 12, 2018 18:00:11 GMT
In theory, assuming their software is OK, you should be able to get it to autotune itself to at least a semi decent fuel map. The £300 would include ignition mapping as well, which is equally as important as a good fuel map, and a lot harder to tune. I wouldn't be ragging the car round without at least having a known safe ignition map, along with some form of knock detection..
If it was supplied as setup for your particular injectors etc then it may point to something else not being quite right as suggested above..
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Post by schercheeroo on Oct 13, 2018 11:02:03 GMT
The ME221 has, in theory, a very nice knock control setup.
It uses DSP knock windowing with a user programmable knock threshold.
When turbocharged these engines will be knock limited at full load. That is the engine will knock before timing is at MBT(unless you're running crazy octane, water/meth or some other way of limiting knock).
It should be possible to tune for best full load power on the road just using the ME221 knock control strategy and autotune functions.
Part load ignition calibration will be more difficult to do on road as you may not be knock limited at lighter loads.
However, I've never back to back driven a car that's been road tuned then a dyno tuned car, so I have no feeling for how significant tuning the ignition timing to MBT is.
It will certain improve fuel economy, but on a vehicle like this that is probably not too much of a concern.
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le sigh