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Author Topic: MAP sensor Scaling in Eurodyne (4 bar)  (Read 15891 times)
nyet
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« Reply #15 on: April 13, 2016, 01:10:54 PM »

The ECU does not read more than 2550mbar. You can not rescale for more. 2550mbar is 65535 and it is a 16 bit value. End of story.
If it goes over that the ECU is blind. It will put the same fuel for 2550mbar, 3000 mbar, 4000 mbar etc. It will also run the same timing.
A standalone boost controller will never to any decent degree work with ME7 either.

What we did on here was double the scaling limit to 5120 mbar absolute. This took a long time to do the first time.
It still takes a long time to do for every file, at least a day for me, and I am one of the original authors of the mod.

So please, do not waste time typing up walls of useless text. Instead try to read more.

P.S.
No one on here cares about eurodyne or maestro. You won't get help here with that, stop trying.

Absolutely agree all points. You can overcome the fueling issue to some extent by undscaling the MAF at high PRs but at some point it just makes your job harder as you work around one issue after another trying to force ME7 into doing stuff it just doesn't want to.

Disregard prjs advice at your own peril.
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dgpb
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« Reply #16 on: April 18, 2016, 07:30:07 AM »

I'm totally noob on exceeding map limit. Keeping that in mind:

Why are there fuelling issues? If it's a wideband ecu and you work by bts, which is actual load based and not boost... It looks at the maf, not the map...

Just a simple question guys, because I read lots of posts without the hack that reply fuelling issues. And I don't understand why. The only problem I see would be boost control.

Ps: And timing is also load based
« Last Edit: April 18, 2016, 07:31:52 AM by diegogpb » Logged
prj
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« Reply #17 on: April 18, 2016, 11:34:48 AM »

Why are there fuelling issues? If it's a wideband ecu and you work by bts, which is actual load based and not boost... It looks at the maf, not the map...
Because ME7 is a speed-density ECU.
It goes from MAF to pressure to load. The pressure it calculates from the MAF hits the 65535 ceiling and your load freezes.

Do some reading in the 5120 thread. I am done spoonfeeding here.
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dgpb
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« Reply #18 on: April 18, 2016, 12:24:33 PM »

Thanks prj
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nyet
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« Reply #19 on: April 18, 2016, 08:37:38 PM »

I'm totally noob on exceeding map limit. Keeping that in mind:

Why are there fuelling issues? If it's a wideband ecu and you work by bts, which is actual load based and not boost... It looks at the maf, not the map...

Just a simple question guys, because I read lots of posts without the hack that reply fuelling issues. And I don't understand why. The only problem I see would be boost control.

Ps: And timing is also load based

Max out ps_w and everything goes to hell. As mentioned before in this thread you can hack around that via underscaling maf progressively as you approach max pressure but that only works to a point.

You can make all the poor decisions you want, you'll just have increasingly annoying things to fix, wideband or not.
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ME7.1 tuning guide
ECUx Plot
ME7Sum checksum
Trim heatmap tool

Please do not ask me for tunes. I'm here to help people make their own.

Do not PM me technical questions! Please, ask all questions on the forums! Doing so will ensure the next person with the same issue gets the opportunity to learn from your ex
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