mk4 ibiza cupra VAG-COM Logs - Boost issues

[Pabs]

This is the most recent RR of the car on a reliable set of rollers:

And here's what JKM have said when looking at all of the logs they have for the car:

The car appeared to be running quite consistently on the dyno, it made 211.7BHP – then as it heat soaked in later runs the power dropped off slightly (normal).

Comparing the results of this code with REVO, I would guess it requests mid range boost for longer than the typical REVO file does. The AFR (fuelling) is slightly leaner than REVO will request/run through the mid range, it then becomes a lot richer after about 5500rpm – though this may be it getting hot.

The slightly leaner AFR could lead to higher exhaust gas temperature measurements (though no probe is actually fitted so this cant be verified directly).

 

[Pabs]

Some new logs from tonight after swapping out the N75, and adding a couple of shims to the 007P spring (green):

3 runs total - couldn't quite get to redline, but hopefully they may still help.

Group B:	'115			
	Engine Speed	Engine Load	Spec. Boost	Actual Boost
TIME	700-6800 RPM	15-150%	990-1800 mbar	<=1800 mbar
STAMP	 /min	%	 mbar	 mbar
0	1440	40.6	990	1000
1.21	1640	86.5	1580	1110
2.51	2080	109.8	2010	1390
3.82	2600	151.1	2180	1910
5.13	3400	189.5	2270	2400
6.33	4080	173.7	2430	2230
7.55	4720	166.2	2380	2040
8.75	5280	154.1	2380	1940
9.96	5760	148.1	2440	1880
11.37	6000	11.3	990	1200


127.93	2000	114.3	1940	1480
129.14	2240	140.6	2080	1760
130.55	2640	166.2	2180	2180
131.75	3000	158.6	2230	2090
132.97	3320	154.9	2250	2090
134.26	3680	177.4	2310	2280
135.58	4040	172.2	2400	2240
136.78	4400	168.4	2390	2120
138.01	4720	160.9	2380	2090
139.3	5040	162.4	2340	1980
140.5	5360	156.4	2380	1880
141.72	5600	151.9	2410	1880


193.01	2000	110.5	1940	1440
194.21	2320	139.8	2100	1770
195.42	2680	166.9	2180	2190
196.62	3080	166.9	2240	2080
197.93	3520	172.9	2280	2150
199.34	3960	172.2	2400	2290
200.54	4280	165.4	2410	2200
201.76	4640	168.4	2390	2090
203.07	4960	160.2	2350	2000
204.38	5240	155.6	2380	1980
205.58	5320	11.3	990	1340

Group C:	'118			
	Engine Speed	Air Temp In	Boost Dut Cyc	Actual Boost
TIME	700-6800 RPM	<=110 C	0-100% 	<=1800 mbar
STAMP	 /min	°C	%	 mbar
0.4	1480	29	0	990
1.71	1800	27	95.3	1220
2.91	2240	24	95.3	1520
4.22	2840	24	95.3	2080
5.53	3600	21	95.3	2010
6.73	4280	22	95.3	2140
7.95	4920	23	95.3	1990
9.15	5480	24	95.3	1910
10.48	5960	26	95.3	1830
11.87	5840	24	0	1060

128.33	2080	23	95.3	1560
129.64	2400	23	95.3	1940
130.95	2760	22	89.8	2260
132.15	3080	21	92.5	2220
133.46	3440	23	95.3	2280
134.66	3800	23	95.3	2240
135.99	4160	24	95.3	2180
137.19	4520	25	95.3	2090
138.41	4840	27	95.3	2040
139.7	5160	28	95.3	1990
140.9	5440	29	95.3	1910
142.22	5640	29	0	1430

193.41	2080	26	95.3	1530
194.61	2400	24	95.3	1930
195.82	2800	24	86.3	2290
197.04	3200	24	89.4	2330
198.43	3680	24	95.3	2280
199.74	4080	24	95.3	2220
200.96	4440	26	95.3	2140
202.17	4720	27	95.3	2110
203.47	5040	29	95.3	2000
204.78	5360	30	95.3	1930
205.98	5320	29	0	1100

 

[Damoegan]

Actual boost is a little low and duty cycle is high..

 

[Pabs]

And also block 020 and 032, although, I stupidly logged these together rather than have an idea of when I was putting foot to floor. but I've filtered out what I think is rubbish to leave this:

EDIT: I know these are probably useless, but hey - I'll post them anyway.
Looks like quite high CF's IMO. Have no idea about the Lambda stuff.

Group A:	'020			
	Idle Stabilization	Idle Stabilization	Idle Stabilization	Idle Stabilization
TIME	700-820 rpm	2.0-4.5 g/s	0.2-4.0%	0-12 BTDC
STAMP	 CF	 CF	 CF	 CF
53.7	0	0	0	0
54.52	0	0	0	0
55.41	0	3	0	3
56.21	0	3	0	3
57.14	0	3	3	3
58.04	0	3	3	3
58.84	0	3	3	3
59.73	0	2.3	3	2.3
60.55	0	0.8	2.3	0.8
61.46	0	0	0.8	0
				
				
130.44	0	0	0	0
131.26	0	0	0	0
132.15	0	0	0	0
132.95	0	0	0	0
133.86	0	0	0	0
134.66	0	0	0	0
135.48	0	0	0	0
136.28	0	0	0	3
137.18	0	0	0	3
138.09	0	3	3	6
139	0	3	3	6
139.9	0	3	3	5.3
140.71	0	6	3	5.3
141.7	0	6	6	5.3
142.52	0	5.3	6	4.5
143.32	0	0	0	0
								
304.94	0	0	0	0
305.74	0	0	0	0
306.65	0	0	0	0
307.56	0	0	0	0
308.36	0	0	0	0
309.16	0	0	0	0
309.98	0	0	0	0
310.87	0	0	0	0
311.67	0	0	0	0
312.49	0	0	0	0
313.29	0	0	0	0
314.2	3	3	0	5.3
315	3	3	0	5.3
315.82	3	3	3	5.3
316.71	3	3	3	4.5
317.63	2.3	3	3	4.5
318.43	2.3	2.3	3	4.5
319.23	2.3	5.3	2.3	4.5
320.02	2.3	5.3	2.3	3.8
320.84	1.5	4.5	2.3	3.8
321.74	1.5	4.5	1.5	3

Group B:	'031	
	Lambda Factor	Lambda Factor
TIME	700-6800 RPM	15-150%
STAMP		
54.1	0.99	1
55.01	1	1
55.81	0.99	1
56.63	1.01	1
57.62	0.92	0.92
58.44	0.89	0.88
59.25	0.83	0.84
60.15	0.8	0.82
60.96	0.8	0.8
61.86	0.8	0.8
		
		
130.04	1	1
130.84	0.99	0.96
131.75	0.94	0.95
132.55	0.95	0.95
133.37	0.94	0.95
134.26	0.93	0.95
135.06	0.95	0.95
135.88	0.95	0.95
136.78	0.98	0.95
137.59	0.93	0.95
138.49	0.95	0.95
139.49	0.93	0.95
140.29	0.91	0.91
141.22	0.87	0.88
142.12	0.84	0.85
142.92	0.88	1
		
	
304.54	1.03	1
305.34	0.93	1
306.16	0.86	1
307.05	0.88	1
307.96	1	1
308.76	0.95	0.95
309.56	0.93	0.95
310.38	0.95	0.95
311.27	0.94	0.95
312.09	0.94	0.95
312.89	0.95	0.95
313.69	0.95	0.95
314.6	0.88	0.95
315.4	0.93	0.95
316.31	0.95	0.95
317.11	0.93	0.92
318.03	0.88	0.88
318.83	0.87	0.87
319.64	0.84	0.84
320.42	0.81	0.83
321.24	0.82	0.81

 

[Damoegan]

Higher cf's in the second log than I'd like to see and its running lean, 13.965 A/F

 

[Pabs]

go on then - explain how you came to that A/F figure

Yeah, I know the CF's are high. Is there anything that screams - holey cr*p that's bad, or is it within the realms of "acceptable"?

I suppose the only way to correct most of this is to change the map, isn't it..

 

[Pabs]

I'm also going to leave the replacement N75 on the car for a while, and see if it feels any different.
On the above logs, I can still feel it surging easily, but I'm not sure if it's better or worse than before - perhaps no different. Hopefully I'll get a better idea with normal driving to work and back.

Not that it'd make any difference to above either, but I'm running V-power fuel too.

 

[Damoegan]

Lambda x 14.7 (Stoich) - 0.95*14.7=13.965

cf's are just within the acceptble levels (upto 6).

I only ever run mine on v-power too..

 

[Pabs]

thank you! Knew there was some tricky calculation! hehe

 

[Damoegan]

thank you! Knew there was some tricky calculation! hehe

Its a good job we have a wideband lambda

 

[Pabs]

certainly looks that way!

 

[wild willy]

Pabs i would seriously think about getting another remap since this one is running very lean. Don't rely on the wide band to adjust fueling for you.
Best AFR under wot is around 0.82 lambda.

 

[Pabs]

is everyone 100% sure that it's the remap to blame, and not something else, like a faulty component etc? (Although I suppose the map sets the levels...)

You say VERY lean...?

 

[wild willy]

is everyone 100% sure that it's the remap to blame, and not something else, like a faulty component etc? (Although I suppose the map sets the levels...)

You say VERY lean...?

Pabs I'm no expert and please seek professional guidance on this but from your previous logs it looks like @ 5000 rpm @wot the map requests and achieves 0.91 lambda. This is very lean. Ask Bill and DPJ for a second opinion.

 

[Pabs]

Thats cool - I of course will be taking the issue to a professional to comment - I obviously don't want to be running lean because this will more than likely end up killing the engine.

I'm no expert at this either - to be fair these are the first ever logs I've done myself!

I assume by changing the map, and hence hopefully running richer, I'd lose a bit of power (?) but would have a much healthier car.

I'm assuming the remap can just be mapped over the top - or does it need to be mapped back to standard first? (Don't know how the likes of Revo switches on/off unless it uploads their own version of standard code too...)

I appreciate all of your comments and help as always

 

[Damoegan]

You dont need to take it back to stock map Paul, as REVO etc will already have the file to flash onto the ECU.

You will lose a little power with a safer/richer tune. Most stage 1 maps normaly see 200-215bhp.

 

[DPJ]

Paul,
I agree with what Damien and Carl are saying. (I don't like the look of the map.)



DPJ=professional.....

 

[wild willy]

Paul,
I agree with what Damien and Carl are saying. (I don't like the look of the map.)



DPJ=professional.....

compared to most of the rest of us........

 

[Pabs]

Thanks!

Not sure when I can afford to get a different map put on it - it's going to be the best part of £400 odd

 

[ibizacupra]

have you spoken to regal about it first?
surging is likely map, and i have seen revo codes do this in the early days.

afr is on the lean side, and the boost delivery is unusual for a k0-3s asking for more boost over 4krpm, just where it will mechanically run out of puff, hence not have a chance of meeting it anyhows.
duty cycle is max'd out a lot of the time, so your turbo looks unwilling to produce more than 1.2bar which is'nt normal for k03s

i would try asking regal to sort it before throwing money at alternative.. maybe a refund is possible or revised code which deals with it.. i do think however that there is something amiss with your engine tho, as the turbos apparent inability to meet the requested boost a lot of the time is puzzling