Can anyone see anything wrong..

[Daz_gibbo]

Been a drop in peak boost lately, was seeing 21, 22Psi now around 18 Psi..
Maf values also seem a bit shady at 140g/s max!.

Monday	6	March	2006	15:14:59											
6K0 906 032 AA		1.8L 20VT EU3       0002													

	Group A:	'003				Group B:	'020				Group C:	'115			
		RPM	Mass Flow	Load	Ign. Timing		Idle Stabilization	Idle Stabilization	Idle Stabilization	Idle Stabilization		RPM	Load	Absolute Pres.	Absolute Pres.
	TIME					TIME					TIME				
Marker	STAMP	 /min	 g/s	%	 °BTDC	STAMP	 CF	 CF	 CF	 CF	STAMP	 /min	%	 mbar	 mbar
	0.89	4560	70.81	30.6	28.5	0.29	0	0	0	0	0.59	4400	80.5	1080	1310
	1.89	5280	134.06	100	12	1.19	0	0	0	0	1.49	4960	96.2	1460	1300
	2.79	4600	29.97	28.2	43.5	2.19	0	0	0	0	2.49	5280	19.5	1010	1720
	3.69	4200	130.83	100	6.8	3.09	0	0	0	0	3.39	4000	139.1	2190	1740
	4.59	4600	139.47	100	6.8	3.99	0	0	0	0	4.29	4440	161.7	2150	2050
	5.59	5040	140.67	100	7.5	4.98	0	0	0	0	5.29	4920	149.6	2110	1900
	6.59	5480	139.33	100	9.8	5.89	0	0	0	0	6.19	5320	137.6	2050	1820
	7.59	4400	125.97	100	9.8	6.99	0	0	0	0	7.29	4320	97.7	2090	1210
	8.59	4720	139.03	100	6.8	7.99	0	0	0	0	8.29	4640	155.6	2150	2030
	9.49	4960	139.22	100	6.8	8.89	0	0	0	0	9.19	4880	150.4	2110	1960
	10.39	5160	139.75	100	8.3	9.79	0	0	0	0	10.09	5080	145.1	2090	1890
	11.39	5400	139.25	100	9.8	10.69	0	0	0	0	10.99	5280	138.3	2060	1850
	12.29	5560	137.94	100	10.5	11.69	0	0	0	0	11.99	5520	131.6	2030	1810
	13.29	4560	116.28	100	12.8	12.59	0	0	0	0	12.99	4720	46.6	1980	1280
	14.19	4680	138.33	100	6.8	13.59	0	0	0	0	13.89	4640	152.6	2150	2040
	15.09	4800	139.39	100	6.8	14.49	0	0	0	0	14.79	4760	152.6	2130	2040
	15.98	4920	140.44	100	6.8	15.39	0	0	0	0	15.69	4880	150.4	2120	1990
	16.89	5000	140.44	100	7.5	16.29	0	0	0	0	16.59	4960	148.1	2110	1950
	17.89	5120	141.08	100	8.3	17.19	0	0	0	0	17.49	5080	144.4	2100	1940
	18.79	5160	139.14	100	8.3	18.19	0	0	0	0	18.49	5160	140.6	2080	1930
	19.69	5280	140.28	100	9.8	19.09	0	0	0	0	19.39	5240	140.6	2080	1880
	20.59	5320	139.64	100	9	19.99	0	0	0	0	20.29	5320	136.8	2050	1880
	21.49	5360	140.44	100	9	20.89	0	0	0	0	21.19	5360	136.1	2050	1870
	22.48	5440	137.11	100	9	21.79	0	0	0	0	22.08	5400	133.1	2040	1870
	23.38	5480	137.5	100	9	22.78	0	0	0	0	23.08	5440	131.6	2040	1860
	24.38	5480	138.61	100	9	23.68	0	0	0	0	24.08	5480	131.6	2040	1850
	25.28	5520	137	100	9.8	24.68	0	0	0	0	24.98	5560	130.1	2040	1830
	26.18	5400	9.69	4.7	23.3	25.58	0	0	0	0	25.88	5480	27.8	1020	1600
	27.28	5200	8.17	5.9	15	26.48	0	0	0	0	26.88	5280	7.5	1020	1110
	28.28	4960	8.28	6.3	14.3	27.58	0	0	0	0	27.88	5080	8.3	1020	1080
	29.28	4760	8.19	5.9	14.3	28.67	0	0	0	0	28.98	4840	9	1020	1080
	30.17	4600	7.72	5.9	14.3	29.57	0	0	0	0	29.87	4680	9	1020	1070

 

[Daz_gibbo]

Can anyone suggest other blocks to measure?

 

[Jonzy]

I usually do 003,020,115,118

 

[Daz_gibbo]

Ahh yeah. 118 includes duty cycle. Be good for spotting any leaks.
Thats next on the cards then!

 

[CupraSteve]

MAF seems very low considering youve had yours remapped i would expect 160-170 maybe more, mine max's about 153 and mines totally standard

 

[YerMother]

Possible boost leak there as Actual boost is around 150 - 200 mbar off requested throughout, but that wouldn't explain low MAF readings so could be MAF see if you can borrow someones and do some more logs, try to eliminate things!

 

[Daz_gibbo]

I should see 100 in duty cycle meaning wastegate closed = boost leak right?
Want to get it running well before POD!

 

[Daz_gibbo]

Right, standard air box is going on tomorrow just for reference
Will log 118 aswell and report back.

 

[Martyn]

Reset the ECU and see if the lost boost comes back....if it does you know the ECU is pulling back the boost for one reason or another.

 

[Daz_gibbo]

I'll have a play with SPS3 now and do another run

 

[CupraSteve]

Reset the ECU and see if the lost boost comes back....if it does you know the ECU is pulling back the boost for one reason or another.

is this just a case of disconecting the battery for 30 mins or so?

 

[Martyn]

Yea, 5-10 mins will do it too.

 

[YerMother]

I should see 100 in duty cycle meaning wastegate closed = boost leak right?
Want to get it running well before POD!

No you don't want to see 100s

You should see 100 [or 95.6 whatever it has been mapped to (Safety margins)] initially so that the turbo can spool up to meet requested it should drop to around 80% and slowly rise to max or close to max higher up the rev range! If your seeing max duty near enough throughout the rev range then it could indicate a leak or the ECU is simply requesting too much! But if you said you used to get 20psi peak before and now you are not then it is more than likely a leak!

 

[PhilW]

What revo settings you running? Those CF values are lookin very healthy if it has been advanced, or isnt it advanced much now?


Actual looks low to be as mentioned above.

 

[Daz_gibbo]

Runing HB6 Timing 7.. never seem to get anything other than 0 regarding CF values...

 

[Daz_gibbo]

Log from just now. Would I be right in thinking N75 is knackered? Not acheiving anywhere near requested and yet N75 is going <95%?

Any help appreciated..

Wednesday	8	March	2006	14:00:05										
6K0 906 032 AA		1.8L 20VT EU3       0002												
														
	Group A:	'003				Group B:	'115				Group C:	'118		
		RPM	Mass Flow	Load	Ign. Timing		RPM	Load	Absolute Pres.	Absolute Pres.		RPM	Temperature	Load
	TIME					TIME					TIME			
Marker	STAMP	 /min	 g/s	%	 °BTDC	STAMP	 /min	%	 mbar	 mbar	STAMP	 /min	°C	%
	0.3	2240	25.22	14.5	26.3	0.6	2280	57.9	990	1070	0.9	2320	13	0
	1.2	2360	28	16.5	26.3	1.5	2400	71.4	1020	1090	1.81	2480	14	4.7
	2.1	2560	58.72	100	11.3	2.4	2640	125.6	1740	1360	2.7	2720	15	100
	3	2800	83.75	100	4.5	3.3	2920	158.6	2010	1650	3.6	3000	15	94.9
	3.9	3120	103.47	100	3.8	4.2	3240	170.7	2020	1770	4.5	3320	15	85.5
	4.8	3440	115.28	100	3.8	5.1	3560	175.2	2020	1820	5.41	3680	15	86.3
	5.81	3840	125.56	100	6	6.1	3960	172.9	2010	1830	6.4	4040	17	83.9
	6.71	4160	133.36	100	6.8	7.01	4280	165.4	1970	1780	7.31	4400	18	83.9
	7.61	4520	136.61	100	6.8	7.91	4600	155.6	1920	1700	8.21	4680	18	88.6
	8.51	4800	138.61	100	6.8	8.81	4920	148.1	1870	1640	9.11	5000	18	89.4
	9.41	5080	138.22	100	8.3	9.71	5200	139.1	1840	1590	10.01	5280	19	90.2
	10.31	5360	108.97	53.7	4.5	10.61	4600	16.5	990	1380	10.91	4120	17	0
	11.21	4160	92.17	100	17.3	11.51	4240	133.8	1990	1550	11.91	4320	19	83.9
	12.3	4400	132.42	100	6.8	12.61	4440	157.9	1950	1820	12.91	4520	21	83.9
	13.21	4560	134.89	100	6.8	13.51	4640	153.4	1920	1780	13.81	4680	21	84.7
	14.11	4760	136.61	100	6.8	14.41	4800	148.9	1890	1750	14.71	4400	21	0
	15.01	3800	10.17	2	12	15.41	3720	9	990	1080	15.7	3640	18	0
	16	3480	4.42	3.1	13.5	16.31	3400	7.5	990	1030	16.7	3240	17	0
	17	3120	4.67	3.1	13.5	17.3	3000	8.3	990	1010	17.6	2880	16	0
	17.9	2800	4.53	2.7	13.5	18.2	2720	8.3	990	1010	18.5	2640	15	0

 

[Jonzy]

Looks similar to my problem, oh and the forge tip aint got a hope in hell in fitting a gt28rs

 

[Daz_gibbo]

How about the GTRS though? , cheers, won't be buying that then.
Yeah this is starting to piss me off now. It's slow as now. Will try N75 in the garage later and whip dumpvalve off.

 

[Martyn]

Daz, sort the MAF out first, then we'll investigate the lost boost

 

[Daz_gibbo]

On the biggest part it's a dirty filter. I will whip standard airbox on and see what it comes out with to eliminate that though.
Boost is my serious issue as the car has been ~140g/s for a while but has not been like this!
I'll get a new MAF but what about this prob?