IWay
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« on: January 14, 2021, 03:31:02 AM »
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Hello,
Completely ready to be shot down in flames for this one!
Does anybody know what the ME7.5 out of limits behaviour is?
EG When the MAP goes over the 2560 milbar limit what does the ECU do;
• Doesn’t use the MAP value and uses known values to control the engine?
• Uses the max or some other default value?
• Something else?
I’m thinking if this behaviour is known then it might be possible to tune outside the ECU limits without using the 512 hack & bigger MAP sensor. It would probably mean that some of the PID control wouldn’t work when out of limits and set values would be required but set values already used in some scenarios.
You would also need some way of measuring the out of limit values.
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_nameless
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« Reply #1 on: January 14, 2021, 08:50:45 AM »
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fueling, load, and timing are all off when over the map sensor limit and boost pid doesnt work sense youre over the map sensor limits
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If you are in the market for a tune and would like the ease of downloading and flashing a dyno tested tune for a fair price check out https://instatune.sellfy.store/ |
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IWay
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« Reply #2 on: January 14, 2021, 10:33:58 AM »
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Yep, by a long way.
Probably going to have to open the 512 can of worms.
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nyet
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« Reply #3 on: January 14, 2021, 03:21:30 PM »
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I’m thinking if this behaviour is known then it might be possible to tune outside the ECU limits without using the 512 hack & bigger MAP sensor.
If you can do this, you can do the 5120 hack. |
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IWay
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« Reply #4 on: January 15, 2021, 02:57:06 AM »
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I'm aware of what the 512 hack is and the principle behind it, but as where to start I'm at a bit of a loss. IE Which maps to change for a ME7.5, double or half them etc Any pointers\URL's to get me started, an example tune where it's already been applied would be nice  |
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_nameless
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« Reply #5 on: January 15, 2021, 09:52:29 AM »
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I'm aware of what the 512 hack is and the principle behind it, but as where to start I'm at a bit of a loss. IE Which maps to change for a ME7.5, double or half them etc Any pointers\URL's to get me started, an example tune where it's already been applied would be nice first off its 5120 (meaning 5120millibar) are you writing it wrong because youre lazy or you have no clue? also look on the forum you think someone is going to spoon feed you lol, right. |
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If you are in the market for a tune and would like the ease of downloading and flashing a dyno tested tune for a fair price check out https://instatune.sellfy.store/ |
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IWay
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« Reply #6 on: January 18, 2021, 09:02:20 AM »
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There’s an awful lot to change and I'm afraid if I miss something the car might go bang, how can I mitigate the bang scenario whilst I work on the map?
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nyet
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« Reply #7 on: January 18, 2021, 11:48:33 AM »
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Stay below 21 PSI and learn doing that.
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adam-
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« Reply #8 on: January 18, 2021, 02:04:24 PM »
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Do you have rods btw?
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IWay
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« Reply #9 on: January 19, 2021, 02:43:27 AM »
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New rods & bearings on order,
3 general questions;
- How do you know if you've missed a map or is it a case of if it's working it must be correct?
- When logging with VisualME7logger do you need to rescale the log file so it shows the correct pressure in the graph?
- Which is the preferred MAP sensor?
Thanks
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BlackT
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« Reply #10 on: January 19, 2021, 06:38:39 AM »
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Lazy, you have all description and answers on wiki and forum
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IWay
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« Reply #11 on: January 19, 2021, 07:01:22 AM »
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Going for a 4 Bar Bosch 0 281 006 059 MAP.
The VisualMELogger data can be modified using the Expression Tab in VisualMELogger.
Still not quite sure how verify if the 5120 hack is working correctly? As I say if it works it's correct?
Any comments on the above welcome.
Thanks
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adam-
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« Reply #12 on: January 19, 2021, 08:30:30 AM »
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Did you carry out the ASM changes?
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IWay
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« Reply #13 on: January 19, 2021, 08:45:08 AM »
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Does it need ASM changes?
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« Last Edit: January 19, 2021, 09:01:58 AM by IWay »
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tjwasiak
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« Reply #14 on: January 19, 2021, 09:14:56 AM »
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Of course it does!
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