At some point, many things are just unitless scalars, or used in calculations where the result are some other units where the "natural" unit doesn't make sense because of another scaler (say pi or something - radians vs degrees, etc), or they are inverse units.

So in many case the "meaning" of the value in the CPU may not directly align with any sort of units or scaling that makes sense to you..

Added x3 LAMFA maps

BGFAWU
	1D6886	LAMFA
	1D68FE	LAMFA
	1D6976	LAMFA

I noticed that even in the defined WinOLS that I'm using as a reference, the values looked a bit strange. The Y-Axis peaks in the centre which can't be correct



After a bit of searching, I found a suggestion about moving an axis and table by one byte:

Increment Y-Axis Start Address by one byte (from 0x1D6879 to 0x1D687A)
Increment Map Start Address by one byte (from 0x1D6885 to 0x1D6886)



Looked a lot better after that Has anyone else come across this?

My advise, use DAMOS as an orientation... if you look closer you´ll find a bunch of another weird things in some maps.

Hi all,

So I finally made some changes Not very big ones, I'm still very new and it's more a question of changing one thing at a time and understanding the consequences. I haven't posted this in the tunes section of this forum since it's far from a tune!

This is MED9.1 on an Audi S3 2.0 TFSI (UK specification, manual gearbox).

Please bear with me, the tables are number-heavy and I've split things across several posts to make things a bit neater. I've changed just 3 maps:

KFMIRL
KFMIOP
LDRXN

Firstly, my stock values:

KFMIRL - stock

% / RPM	500	700	800	1000	1240	1520	2000	2520	3000	3520	4000	4520	5000	5520	6000	6520
4.0009	11.4375	10.9453	10.7109	10.2188	9.7031	9.3047	8.8828	8.6250	8.5313	8.5078	8.5313	8.5078	8.4375	8.2734	8.0625	7.8281
5.9998	15.7266	15.2813	15.0703	14.6250	14.1094	13.6875	13.1719	12.8438	12.6563	12.5859	12.5625	12.4922	12.3516	12.1406	11.9063	11.6250
8.0002	19.9922	19.6172	19.4297	18.9844	18.5391	18.0703	17.4844	17.0391	16.8047	16.6875	16.5938	16.4531	16.2891	16.0313	15.7500	15.4219
13.9999	32.7188	32.6016	32.5547	32.3672	31.8281	31.1719	30.3047	29.6719	29.2500	28.9219	28.6641	28.3594	28.0313	27.6563	27.2813	26.8359
19.9997	45.4219	45.3047	45.2344	45.0469	44.6953	44.1094	43.1484	42.3516	41.7656	41.2031	40.7109	40.2188	39.7500	39.2578	38.7891	38.2500
30.0003	66.6563	66.3750	66.2344	66.0000	65.8594	65.3203	64.3359	63.3984	62.5313	61.4531	60.5391	59.7422	59.1563	58.6172	58.1016	57.5391
39.9994	88.1250	87.5391	87.2578	86.7422	86.2969	86.0156	85.1016	83.8359	82.5703	81.2578	80.1797	79.3359	78.7969	78.3047	77.9063	77.5313
50.0000	109.9922	109.4766	109.1953	108.7031	108.1406	107.5781	106.2891	104.4609	102.7969	101.3672	100.3359	99.5859	99.2109	99.0469	99.0703	99.3281
60.0006	132.3516	131.9766	131.8125	131.4375	130.9688	130.3125	128.8828	126.7500	124.6875	122.9531	121.7578	121.0313	120.8672	121.1719	121.8047	122.8359
69.9997	154.9453	154.7344	154.6172	154.3594	154.0313	153.5625	152.5078	150.6328	148.3828	146.1797	144.6563	143.6953	143.5781	144.1641	145.3594	147.1875
80.0003	177.6797	177.5859	177.5391	177.4219	177.2344	176.9297	176.0391	174.4688	172.3594	170.0859	168.3281	167.1563	166.9453	167.5547	168.7500	170.4375
90.0009	200.3203	200.3672	200.3906	200.4141	200.4141	200.2969	199.7109	198.4219	196.5234	194.1797	192.2109	190.8281	190.4531	191.0391	192.1875	193.6172

KFMIOP - stock

% / RPM	500	700	800	1000	1240	1520	2000	2520	3000	3520	4000	4520	5000	5520	6000	6520
10.0078	3.3279	3.5660	3.6819	3.9017	4.1397	4.3228	4.5212	4.6539	4.7150	4.7333	4.7348	4.7516	4.8019	4.8965	5.0125	5.1498
15.0000	5.6625	5.8685	5.9708	6.1752	6.3995	6.5964	6.8466	7.0282	7.1259	7.1793	7.2113	7.2632	7.3441	7.4707	7.6111	7.7774
20.0156	8.0154	8.1833	8.2703	8.4579	8.6685	8.8852	9.1873	9.4131	9.5474	9.6359	9.7015	9.7900	9.9030	10.0571	10.2234	10.4172
35.0156	15.0833	15.1321	15.1581	15.2313	15.4663	15.7715	16.2064	16.5375	16.7740	16.9830	17.1585	17.3630	17.5674	17.7979	18.0283	18.2968
50.0156	22.1634	22.2382	22.2778	22.3740	22.5143	22.7722	23.2239	23.6282	23.9563	24.3332	24.6750	25.0076	25.2869	25.5615	25.8224	26.1215
65.0156	29.2191	29.3457	29.4083	29.5181	29.5868	29.8599	30.3360	30.7983	31.2408	31.7978	32.2876	32.6996	32.0002	33.2718	33.5144	33.7845
80.0156	36.2335	36.4670	36.5814	36.7966	36.9568	37.1140	37.5504	38.1317	38.7222	39.3753	39.9200	40.3412	40.6006	40.8249	40.9988	41.1514
100.0078	45.4575	45.7199	45.8481	46.0892	46.3287	46.5317	47.0551	47.8561	48.6252	49.3210	49.8322	50.1999	50.3677	50.4395	50.4135	50.2960
120.0000	54.4983	54.7012	54.8004	54.9927	55.2216	55.5099	56.1401	57.0435	57.9056	58.6594	59.1934	59.5367	59.6100	59.4757	59.2041	58.7906
150.0000	67.8116	67.9230	67.9810	68.0984	68.2541	68.4723	68.9545	69.7525	70.7001	71.6202	72.2885	72.7173	72.7722	72.5113	71.9894	71.2036
180.0000	81.0257	81.0577	81.0760	81.1203	81.1920	81.3187	81.6681	82.3135	83.1604	84.1156	84.8862	85.4294	85.5530	85.3043	84.7992	84.1278

LDRXN - stock

RPM	1000	1500	1750	1850	2000	2250	2500	3000	3500	4000	4500	5000	5500	6000	6600	6800
%	100.0078	118.0078	125.0156	130.0078	140.0156	172.0078	172.0078	172.0078	172.0078	172.0078	175.0078	175.0078	175.0078	168.0000	158.0156	100.0078

I used VCDS to log 4th gear pulls. What I'm mainly looking at here is specified and actual load. With the stock values in the tables above, this is the result I get. Ambient temperatures are nice and cool (about 5 degrees celsius in the evening) and this is all at sea level.

Specified load is 171. Actual load peaks at 191 (coincides with boost peak) and then settles down to follow specified load 171.

LDRXN - v1

RPM	1000	1500	1750	1850	2000	2250	2500	3000	3500	4000	4500	5000	5500	6000	6600	6800
%	100.0078	118.0078	125.0156	130.0078	145.0000	175.0000	198.0000	198.0000	198.0000	198.0000	198.0000	198.0000	198.0000	170.0000	158.0156	100.0078

And here are the results. Conditions pretty much the same as the stock log (same time of day, similar temperatures, same stretch of road etc).

This time the specified load is higher at 191 and the actual load stays there as well. Specified and actual boost are higher as well (and still have that little spike at the beginning, same as stock)



If you've read down as far as here, thank you for staying with me  My question is, why is specified load not any higher than 191, despite there being enough headroom in the maps? I did find some information here which looked relevant

LDRXN is basic max specified load. There's an additive for overboost if active, then factors for knock, IAT, oil temp, and coolant temp. These can all raise or lower max specified load rlmxko_w.

Then max PR is converted to load and limits rlmxko_w.

If there are errors in EGT sensors, IAT sensor, either CTS, or oil temp, then max pressure is converted to load and limits max specified load as well.

If lde exceeds KFDLDULS for a period of time, then max specified load is also limited to LDORXN.

Finally, there's an additive for adaptation channels (lemmi).

This final max specified load, rlmax, limits the output of KFMIRL.

I've got two maps I'm thinking of changing next (LDPBN and KFLDHBN) and was wondering if they'd affect the specified load. I know KFTARX could be a factor as well but my temperatures are pretty low.

Thanks!

It's LDPBN for sure. Stock it's 2250 across the board. This equates to a little over 18psi which would easily equate to your 191 load. I changed this to 2550 across the board

I've been told LDPBN has a slightly different meaning in med9. By definition in me7 it's max pressure under error condition or something. In med9 I think it's just max pressure.

You changed the values in KFMIOP. Why not the axis in KFMIRL?

I’m still struggling with that initial boost spike  

I’ve done some logging and the graph is below.

1)   After the initial spike, actual boost tracks requested boost very nicely
2)   Requested boost is 2350mbar and the spike reaches about 2600mbar
3)   The spike lasts for about 500 rpm (2900 rpm  – 3400 rpm)
4)   WGDC starts at 95 % before settling down around 50 %



I think I’ve misunderstood what to do with KFLDIMX.

KFLDIMX – stock

hPa / RPM		1000		1250		1500		1750		2000		2250		2500		2750		3000		3500		4000		4500		5000		5500		6000		6500
0	¦	0.0000	¦	0.0000	¦	0.0000	¦	0.0000	¦	0.0000	¦	0.0000	¦	0.0000	¦	0.0000	¦	0.0000	¦	5.0000	¦	10.0000	¦	10.0000	¦	10.0000	¦	10.0000	¦	10.0000	¦	10.0000
300	¦	19.0000	¦	19.0000	¦	19.0000	¦	19.0000	¦	19.0000	¦	19.0000	¦	16.8750	¦	15.0000	¦	14.0650	¦	17.1900	¦	21.2500	¦	21.7200	¦	22.1900	¦	23.1250	¦	25.0000	¦	26.8750
400	¦	25.3350	¦	25.3350	¦	25.3350	¦	25.3350	¦	25.3350	¦	25.3350	¦	22.5000	¦	20.0000	¦	18.7500	¦	21.2500	¦	25.0000	¦	25.6250	¦	26.2500	¦	27.5000	¦	30.0000	¦	32.5000
500	¦	31.6650	¦	31.6650	¦	31.6650	¦	31.6650	¦	31.6650	¦	31.6650	¦	28.1250	¦	25.0000	¦	23.4400	¦	25.3150	¦	28.7500	¦	29.5300	¦	30.3150	¦	31.8750	¦	35.0000	¦	38.1250
1000	¦	63.3350	¦	63.3350	¦	63.3350	¦	63.3350	¦	63.3350	¦	63.3350	¦	56.2500	¦	50.0000	¦	46.8750	¦	45.6250	¦	47.5000	¦	49.0650	¦	50.6250	¦	53.7500	¦	60.0000	¦	66.2500
1200	¦	76.0000	¦	76.0000	¦	76.0000	¦	76.0000	¦	76.0000	¦	76.0000	¦	67.5000	¦	60.0000	¦	56.2500	¦	53.7500	¦	55.0000	¦	56.8750	¦	58.7500	¦	62.5000	¦	70.0000	¦	77.5000
1500	¦	95.0000	¦	95.0000	¦	95.0000	¦	95.0000	¦	95.0000	¦	95.0000	¦	84.3750	¦	75.0000	¦	70.3150	¦	65.9400	¦	66.2500	¦	68.5950	¦	70.9400	¦	75.6250	¦	85.0000	¦	94.3750
1600	¦	95.0000	¦	95.0000	¦	95.0000	¦	95.0000	¦	95.0000	¦	95.0000	¦	90.0000	¦	80.0000	¦	75.0000	¦	70.0000	¦	70.0000	¦	72.5000	¦	75.0000	¦	80.0000	¦	90.0000	¦	95.0000

KFLDIMX – v8

hPa / RPM		1000		1250		1500		1750		2000		2250		2500		2750		3000		3500		4000		4500		5000		5500		6000		6500
0	¦	0.0000	¦	0.0000	¦	0.0000	¦	0.0000	¦	0.0000	¦	0.0000	¦	0.0000	¦	0.0000	¦	0.0000	¦	5.0000	¦	10.0000	¦	10.0000	¦	10.0000	¦	10.0000	¦	10.0000	¦	10.0000
300	¦	19.0000	¦	19.0000	¦	19.0000	¦	19.0000	¦	19.0000	¦	19.0000	¦	16.8750	¦	15.0000	¦	14.0650	¦	17.1900	¦	21.2500	¦	21.7200	¦	22.1900	¦	23.1250	¦	25.0000	¦	26.8750
400	¦	25.3350	¦	25.3350	¦	25.3350	¦	25.3350	¦	25.3350	¦	25.3350	¦	22.5000	¦	20.0000	¦	18.7500	¦	21.2500	¦	25.0000	¦	25.6250	¦	26.2500	¦	27.5000	¦	30.0000	¦	32.5000
500	¦	31.6650	¦	31.6650	¦	31.6650	¦	31.6650	¦	31.6650	¦	31.6650	¦	28.1250	¦	25.0000	¦	23.4400	¦	25.3150	¦	28.7500	¦	29.5300	¦	30.3150	¦	31.8750	¦	35.0000	¦	38.1250
1000	¦	63.3350	¦	63.3350	¦	63.3350	¦	63.3350	¦	63.3350	¦	63.3350	¦	56.2500	¦	50.0000	¦	46.8750	¦	45.6250	¦	47.5000	¦	49.0650	¦	50.6250	¦	53.7500	¦	60.0000	¦	66.2500
1200	¦	76.0000	¦	76.0000	¦	76.0000	¦	76.0000	¦	76.0000	¦	76.0000	¦	67.5000	¦	60.0000	¦	56.2500	¦	53.7500	¦	55.0000	¦	56.8750	¦	58.7500	¦	62.5000	¦	70.0000	¦	77.5000
1500	¦	95.0000	¦	95.0000	¦	95.0000	¦	95.0000	¦	95.0000	¦	76.0000	¦	67.5000	¦	60.0000	¦	56.2500	¦	56.2500	¦	66.2500	¦	68.5950	¦	70.9400	¦	75.6250	¦	85.0000	¦	94.3750
1600	¦	95.0000	¦	95.0000	¦	95.0000	¦	95.0000	¦	95.0000	¦	76.0000	¦	67.5000	¦	60.0000	¦	56.2500	¦	56.2500	¦	70.0000	¦	72.5000	¦	75.0000	¦	80.0000	¦	90.0000	¦	95.0000

In general, you want KFLDIMX to follow what you expect your WGDC to be in the steady state, so after peak boost, you should set this to where you want the WGDC to settle.

I probably haven't understood this properly.

Am I reducing it in the right place? I've reduced just a small part of it, but should I be reducing the entire row instead of just a few entries?I've also been very conservative and just made small changes. Should I be taking the whole row down to around 50? I don't have a problem when it settles down, it's just the initial spike