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Author Topic: Load points in KFZW/2 - now turned into ME7.1 vs ME 7.1.1 ECUs  (Read 23911 times)
NOTORIOUS VR
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Seems like it's maxed @ 191.250??

Is that a physical limitation in the ECU or is there another parameter somewhere that needs to be changed that would allow higher numbers?

I'd love to get more control over the ignition timing... having the last row @ 191 but hitting over 220 leaves a lot to be desired
« Last Edit: April 15, 2012, 10:50:06 AM by NOTORIOUS VR » Logged

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phila_dot
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« Reply #1 on: April 15, 2012, 01:12:25 AM »

I'm fairly sure KFZW(2) use 8 bit rl which maxes out at 191.25.
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NOTORIOUS VR
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« Reply #2 on: April 15, 2012, 07:05:21 AM »

That's what I figured...

that sucks big time IMO.... another reason against ME7

FWIW, I noticed that the ECU in the 2003+ Allroad/A6 (4Z7907551R) have more resolution in KFMIRL (16 load points) and also are not limited like the other ME7 ECU's in KFZW either... so I assume it's more 16-bit then 8-bit.

I'm curious if it's possible that the newer ECU will also accept a bigger MAP sensor (maybe that value is also 16-bit)?  Anyone know off hand how I could check?
« Last Edit: April 15, 2012, 07:29:11 AM by NOTORIOUS VR » Logged

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Bische
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« Reply #3 on: April 15, 2012, 08:03:50 AM »

Timing maps in my ME7.5 1.8t is 16bit.

Eurocode is offering a fueling kit for these ME7.5 1.8t's which includes a 3bar MAP sensor.
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NOTORIOUS VR
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« Reply #4 on: April 15, 2012, 08:31:08 AM »

yes the ME7.5 1.8T's are 16bit... just like the later A6/allroad ECU's...

What I would like to know is if the ECU can really see the 3 BAR or if the sensor is just scaled in the ECU
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« Reply #5 on: April 15, 2012, 09:55:41 AM »

Yes it can really see it, i think the 16 bit ecu's limit out at 5bar or somethign as the hard limit.

when you scale, you just get a slope of the sensor at two points voltage=pressure.  use the slope and the min and max voltages supplied on data sheet or ripped out of another file.

thats what ecu uses.  so it can be calibrated properly, and it can be read properly by ecu that supports 16bit.  I am NOT SURE on 1.8t's if they max out at 5 bar as physical limit like some other ecu's i work with.
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NOTORIOUS VR
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« Reply #6 on: April 15, 2012, 10:22:02 AM »

well that is some pretty good news...

I just spent the last hour comparing the ECU pinouts... a direct swap is not possible.. but I believe a swap with the correct BEL engine harness is possible... that along with the more advanced ECU and a bigger MAP sensor = win in my books...

I'm getting a BEL engine harness and auto ECU coming to me soon so I will probably try is out in the next little while as soon as I confirm all of the fusebox connections are going to be correct (I believe they will be).

Too bad it's not wideband, that would be perfect then.
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« Reply #7 on: April 15, 2012, 10:49:40 AM »

FWIW, it seems the even under fueling you can take advantage of 16-bit values... so all in all this is what high HP S4's should be running... complete control over timing, fueling and boost... it's leaps and bounds better then the crummy ME7.1 we currently deal with.
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RaraK
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« Reply #8 on: April 15, 2012, 03:49:00 PM »

to bad we cant recompile and make that a reality :/
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s5fourdoor
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« Reply #9 on: April 15, 2012, 07:04:01 PM »

so can this be done?
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NOTORIOUS VR
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« Reply #10 on: April 15, 2012, 07:09:15 PM »

so can this be done?

can what be done? recompile?  unlikely w/o source...

use a ME7.1.1 ECU in an S4 sure, with the BEL wiring harness and a few changes.  That is my plan for the very near future.
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Breaks everything!


« Reply #11 on: April 15, 2012, 09:24:10 PM »

Really curious where this may go.  I am having very bad thoughts about swapping in a B8 S4 motor and building a turbo setup for it.  This may derail me for a while.
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julex
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« Reply #12 on: April 16, 2012, 06:20:48 AM »

I need to look at pinouts myself. I ordered BEL harness + BEL head covers for my build. Initially it was only because of FSI coils but now there is another reason for it Smiley. Can 7.1.1 really properly see higher pressure  MAP sensor's output correctly?
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NOTORIOUS VR
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« Reply #13 on: April 16, 2012, 06:37:57 AM »

RaraK says yes (I'm assuming he's logged it to know for sure), otherwise I would say the only real way to tell is to check the RAM variables like Tony did for the M-box.

But it's obvious the ME7.1.1 is far superior so it wouldn't surprise me if it did in fact was able to read above 2550 mbar because it uses a 16-bit variable like everything else.
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Gonzo
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« Reply #14 on: April 16, 2012, 06:41:57 AM »

use a ME7.1.1 ECU in an S4 sure, with the BEL wiring harness and a few changes.  That is my plan for the very near future.
Do it. You wont.
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