How much boost should I be getting

[Dougy]

Hi

I have a 51 Seat Cupra R with the following done:

Stage 1 remap
Jetex Filter
Cat back Stainless Exhaust

What sort of boost should I be getting?

Sorry to ask its just I don't think i'm getting what some people have told me but I don't know who is correct

Would also be nice to know what standard boost is

Thanks

 

[MIkey kc]

standard boost is around 6-8psi and yours should be around 15-20psi

 

[Dougy]

Well...

I have just been for a blast and was getting 10psi!!

Tried a different boost guage and was getting 0.9bar

Had vag com on it today to check for errors and nothing came up

All vac hoses are silicon ones I just don't know what the problem is

 

[MIkey kc]

Has it always had that boost or have you only just fitted a boost gauge and noticed? if you go out in it an boot it then pull over unplug the air mass meter and boot it again if it feels faster you need to replace the maf they dont always throw up fault codes. id say your down on boost tho

 

[Damoegan]

k03 stage one map normaly boosts to circa 1.2bar.

 

[Dougy]

Ye I have only just fitted the boost guage and noticed this

I hope its not the MAF as I have just recently replaced it as when I bought it was running in limp mode.

Wouldn't VAG COM pick it up if the MAF was buggered

 

[Damoegan]

If you logged blocks 003 & 115 it will give you MAF reading, requested boost & actual boost.

 

[Dougy]

Whats best way to log it i.e best gear, full load?

Cheers

 

[Damoegan]

3rd gear from circa 2.5k RPM to red line, foot flat on the floor.

 

[Dougy]

Right off i go will report back shortly.......

 

[Dougy]

Results:

 

[Damoegan]

Group A:	'003				Group B:	'115			
	RPM	Mass Flow	Load	Ign. Timing		RPM	Load	Absolute Pres.	Absolute Pres.
TIME					TIME				
STAMP	 /min	 g/s	%	 °BTDC	STAMP	 /min	%	 mbar	 mbar
0.95	1920	39.14	100	9	0.55	1880	89.5	        2020	1180
1.75	2080	52.89	100	3	1.35	2000	111.3	2040	1440
2.55	2320	65.28	100	3	2.15	2200	133.1	2010	1710
3.35	2520	65.28	100	5.3	2.95	2400	142.1	1980	1850
4.15	2720	68.11	100	8.3	3.75	2640	134.6	1940	1750
4.95	2960	75.67	100	10.5	4.55	2840	130.8	1940	1700
5.75	3200	83.94	100	12.8	5.35	3080	134.6	1920	1690
6.55	3440	93.28	100	15	6.15	3320	137.6	1900	1740
7.35	3680	93.44	100	16.5	6.95	3560	139.1	1900	1750
8.15	3920	102.36	100	18	7.75	3800	137.6	1890	1720
8.95	4160	110.19	100	17.3	8.55	4040	135.3	1870	1680
9.75	4400	121.19	99.6	15.8	9.35	4280	142.1	1850	1740
10.664680	128.5	100	15.8	10.15	4520	144.4	1830	1750
11.564960	138.83	100	17.3	11.16	4840	145.9	1810	1740
12.365160	141.11	100	18	11.96	5040	146.6	1800	1740
13.165360	144.67	100	18.8	12.76	5240	143.6	1810	1720
13.965520	145.36	100	19.5	13.56	5440	138.3	1820	1700
14.765720	148.94	100	19.5	14.36	5600	136.8	1770	1690
15.565880	151.58	100	20.3	15.16	5800	136.1	1700	1700
16.366000	152.39	100	21.8	15.96	5920	135.3	1620	1680
17.256160	150.53	100	22.5	16.85	6080	130.1	1570	1640
18.156280	147.14	100	24	17.65	6200	126.3	1530	1610
18.966400	146.89	100	25.5	18.55	6320	122.6	1490	1560
19.766480	144.36	100	26.3	19.36	6440	118	        1470	1530
20.646360	282.54	25.416360	20.16	6400	17.3	        1000	1420
30.133720	10.81	7.5	24	29.73	3760	8.3	        1000	1050
30.953640	22.64	13.7	38.3	30.53	3680	16.5	        1000	1030
31.733600	29.69	16.1	36	31.33	3600	35.3	        1000	1050
32.533520	29.25	15.7	35.3	32.13	3560	42.9	        1000	1140
33.333480	42.47	20.4	27	32.93	3520	56.4	        1000	1140

 

[Dougy]

Cheers i realised that it was not easy to read so just edited my post with an image of it in Excel

Tried it without MAF plugged in and was getting 0.9 bar which not major difference

Can you see anything in the results that would indicate a problem?

 

[Damoegan]

Its not making requested boost. Poss boost leak.

 

[Dougy]

Needle in a haystack then

Apart from checking every pipe is there any other way to check for leaks?

Just when i had my g40 i know its a diff car we could cover one of the charger pipes and you would be able to hear any leaks

 

[Damoegan]

A mix of washing up liquid and water in a spray bottle then spray it on all pipes and joins, it will bubble if any air leak is found.

 

[Dougy]

Okay cheers for your help Damo

Last question, suggest any places that may be more common for leaks to check first?

 

[Damoegan]

Not sure on the mk3 mate as I have a mk4. Sorry.

 

[ibizacupra]

this is not a very powerful map tho.. its not askign for more than a bar other than initially, and its seems flatlined 0.7bar... Is the N75 working or plmbed in correctly? a tweaked up actuator could give this..
Its not a stage 1 map of any note with these low settings..

 

[Dougy]

Not sure how can i check, not too good with Seats still learning, just wished someone in the know how lived near huddersfield