O.R

OR's stock LPT M44 tuning questions

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Hi

At this point my goal is to make little more power with stock engine parts, with safety margin.

Car is V70 AWD, 1997, manual, LPT.

I transfered 609.bin tables and scalars to 608_rev5b.bin and flashed that to my M44. When i accelerate it lights lambda light and goes off when i release throttle, also it does not feel as powerful than stock 609, otherwise idle is good and engine starts normally. Any ideas for that problem?

Before i go further i like to get those WB and boost sensor logging working in Tunerpro.

I started with boost sensor. I have this pressure sensor https://www.ebay.com/itm/3-Bar-Map-Manifold-Absolute-Pressure-Sensor-Turbo-Boost-Wire-Plug-Pigtail-122-CL/223337953057?epid=15026334817&hash=item33fffab721:g:h-8AAOSwDsZcRptR

Sensor is wired like in M44 wikia and tested it with that formula: ((((X/255) + 0.04)/0.004)*0.145)

 

Sensor output reading in Turnerpro with wiki formula was:

- Atmosphere pressure (hose open) = 31.3 psi, sensor voltage to  battery (-) = 1.64 V

- With external 14.5psi (1bar) pressure source = 37.7 psi, sensor voltage to  battery (-) = 3.22 V

- Idle vacuum = -1.6psi, sensor voltage to  battery (-) = 0.54 V

After that tried to correct the reading. I put  "X" only to equation box and see what it outputs. When the hose was open the reading was about 215 which in my mind is too high, because i think it should be more like 83 if 5 V=255. Also it goes to 255 if there is only about 2 psi pressure. Did i do something wrong?

 

 

 

 

Edited by O.R

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Ok, problem was that the logging was not enabled. Now it seems to work fine. Formula for that sensor is ((X-81)/84), unit = Bar.

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Ok, loggin seems to work well, but problem is now that i don't understand why i'm getting knocking with stock values.

 

Is this a correct way to do value transfer from 609.bin to 608_rev5b.bin :

1. In TunerPro 609.bin and rev5b_609_fox_01.xdf is open and i copy for example ignition map values to excel.

2. In TunerPro i open 608_rev5b.bin and rev5b.xdf and copy ignition map values from excel to TunerPro.

Because if i now watch my modified 608_rev5b.bin with 609.xdf and rev5b.xdf i noticed that the map values are not same.

 

 

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I think i found the problem, 608.xdf and 609.xdf map rows are not the same so some values are not correct.

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Don't need to use excel (or other spreadsheet app), just have two instances of Tunerpro open, load binA in one and binB in the other.  Then you can copy/paste directly from/to the two TP dialogs.

Interested in doing what you're doing at some point in the future, so please keep us posted with your progress.

Edited by gdog

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I can't open two TunerPro same time, it says "already open" , maybe need some kind of modification?

I downloaded this https://www.sandboxie.com and now i can open two TunerPro . 

If i want to change let's say "Load threshold lambda control" table 608.xdf row values equal to 609.xdf, can i just select in "Label Source" drop down list "External (Manual)" and change the row values to same. Will the table function like it should or do i need to change those address values or what?

 

Edited by O.R

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Thanks ArMiGer, that will be useful.

 

Today i made couple different versions, one was that modified 608.xdf where i change every table rows and collums to match 609.xdf  rows and columns. I simply choose "External (Manual)" and manual write those 609 values to table. I flashed it and tested and engine starts maybe little lazy and throttle respond was not so good. I get ignition retard and knocking if i revving the engine when i open throttle fast to get some load. When engine is cold and i try to drive, it feels like engine is going to stall, feels like lack of enrichment. Maybe that is not the correct way how to modify .xdf files.

Another version, i used original 608.xdf and transfer every table to 608.bin  from 609.bin which has same values (RPM and load i think) in rows and columns. I tested it and feels better, engine was maybe 40-50C so don't know how it will perform when it's cold. Throttle response feel normal etc. But still i get knocking if i revving the engine when i open throttle fast to get some load or when accelerate i get knocking almost instantly, does not matter low or high RPM.

 

It might hard to understand what i mean because my English is not so fluent.

Here is that better working 608.bin attached if you like to comment it.

608_rev5b_LPT_V3.bin

 

I'm also interested if somebody like to share working stock LPT version of that 608_Rev5b.bin and 608.xdf

Edited by O.R

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I made some progress today. I started over again and i only changed ignition map, VE map and injector factor and put 50% e85 fuel to tank. Now i got zero knocking, it feels there is more power in higher end and maybe little less in lower end.

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5 hours ago, O.R said:

..and put 50% e85 fuel to tank. Now i got zero knocking..

Nothing gets rid of knock like ethanol/alcohol/methanol/etc.  Water/meth injection works quite well to get rid of knock too.

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I have been driving with this tune couple days and no major issues with 50/50 e85, i think.

 

Here is couple things what i noticed when wot accelerating:

- If idle too long in place and engine temp rise about 95-100C i can see ignition retard -1.5 in some cylinder very short time when rpm is  about 2500-3000 . Above that rpm and higher loads i got  zero knocking. If engine cools to about 85C i can't see knocking between 2500-3000. Boost is only 2-3 psi at that knocking point and afr is 14-15 short time. What map to look for that problem, could it need some kind of accelerating enrichment ?

- Injection duty cycle was 91% when load was 6.7ms, rpm 5500 and boost was about 7psi, no much room left.

- When i start to accelerate from 2500 rpm it feel's like kind of turbo lag until  rpm hits about 4000 and after that it feels it pulls better than stock. I would like to have accelerating be like stock tune, between 2500 - 4000 rpm. What map to look for that? Maybe i try to modify TCV duty cycle pilot control to match LPT TCV map, between 2500-4000 rpm.

 

 

I got also couple trouble codes, which i have not got before this tune:

- EFI-422 Atmospheric pressure sensor signal, should i need to disable barometric diagnostic?

- EFI-153 Rear heated oxygen sensor (H02S) signal, maybe need to disable rear O2 sensor diagnostic in emission folder. It is strange, because with previously tune's i did not get that code and boost sensor seems to work fine.

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Is your engine bone stock?  As in stock LPT injectors too?  At min, you'll need to calibrate your injectors, because if that 91% duty cycle is real, you need to upsize them.  You don't want to run more than about 80-85% DC max.  Start with that..

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On 6/12/2019 at 6:22 AM, gdog said:

Is your engine bone stock?  As in stock LPT injectors too?  At min, you'll need to calibrate your injectors, because if that 91% duty cycle is real, you need to upsize them.  You don't want to run more than about 80-85% DC max.  Start with that..

Yes, everything is stock. Injection Basic Adjustment Factor is set to 1 and Injector Opening Time by Voltage is changed according to 609 values. When idling AFR is about 14.3-14.6 and cruising seems to be almost same. Its safer side but little bit off from 14.7, should it be steady 14.7 when idling and cruising. 

 

Here is ADX and cruising log file if you like to look it.

REV5TMM9AFRa.ADX

Cruising AFR test

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Can't access your attachments.  Don't bother using VS server for attachments; it doesn't work.  Use dropbox or other similar service.  Get a free account; fairly easy.

Seems your injector calibration is close enough (but could be better), which means you need more injector size since your duty cycle is exceeding 90% at only 6.7 ms of load.  What's your AFR at this point?  Assume you're logging AFR?  Unless it's very rich (and therefore needs leaning out), you likely need more injector.  Keep in mind it could be rich due to knock enrichment; see if that's being activated.  But shouldn't be if, as you say, the e85 quenched the knock.

Do you know what size your stock injectors are?  i don't know off hand.

 

 

On 6/11/2019 at 1:02 PM, O.R said:

 

- EFI-422 Atmospheric pressure sensor signal, should i need to disable barometric diagnostic?

- EFI-153 Rear heated oxygen sensor (H02S) signal, maybe need to disable rear O2 sensor diagnostic in emission folder. It is strange, because with previously tune's i did not get that code and boost sensor seems to work fine.

Yes, disable diag for both of these.

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