I think this is what boost creep looks like logged

ZuMBLe · 02-07-2007, 09:19 PM

Code:

TPS     RPM     BST     WGDC    LOAD  TURBODYN   AFR
28	3296	-1.31	14.9	1.25	240.61	14.01
66	3331	6.38	30.59	2.06	282.91	14.41
66	3331	6.38	30.59	2.06	282.91	13.02
66	3331	6.38	30.59	2.06	282.91	12.19
100	3385	14.79	48.63	3.21	224.25	10.98
100	3385	14.79	48.63	3.21	224.25	10.26
100	3385	14.79	48.63	3.21	224.25	9.95
100	3449	20.02	40.78	3.57	-53.13	10.14
100	3449	20.02	40.78	3.57	-53.13	10.2
100	3449	20.02	40.78	3.57	-53.13	10.32
100	3523	19.14	34.51	3.33	-26.75	10.82
100	3523	19.14	34.51	3.33	-26.75	11.04
100	3523	19.14	34.51	3.33	-26.75	11.19
100	3570	17.69	45.88	3.21	70.48	11.3
100	3570	17.69	45.88	3.21	70.48	11.16
100	3570	17.69	45.88	3.21	70.48	11.17
100	3663	18.56	44.71	3.38	34.72	11.14
100	3663	18.56	44.71	3.38	34.72	10.98
100	3663	18.56	44.71	3.38	34.72	10.95
100	3715	19.14	43.53	3.41	-3.28	10.92
100	3715	19.14	43.53	3.41	-3.28	10.92
100	3715	19.14	43.53	3.41	-3.28	10.94
100	3779	19.44	42.75	3.39	-7.67	11.01
100	3779	19.44	42.75	3.39	-7.67	10.97
100	3856	19.44	41.96	3.38	-12.07	11.1
100	3856	19.44	41.96	3.38	-12.07	11.1
100	3856	19.44	41.96	3.38	-12.07	11
100	3909	19.44	41.18	3.36	-13.95	11.05
100	3909	19.44	41.18	3.36	-13.95	11.01
100	3909	19.44	41.18	3.36	-13.95	11.16
100	3957	19.58	40	3.33	-12.07	11.1
100	3957	19.58	40	3.33	-12.07	11.13
100	3957	19.58	40	3.33	-12.07	11.1
100	4030	19.58	38.82	3.34	-13.32	11.07
100	4030	19.58	38.82	3.34	-13.32	11.08
100	4030	19.58	38.82	3.34	-13.32	11.08
100	4099	19.44	38.04	3.35	-14.58	11.04
100	4099	19.44	38.04	3.35	-14.58	11.01
100	4099	19.44	38.04	3.35	-14.58	11.05
100	4154	19.58	35.69	3.34	-17.72	11.04
100	4154	19.58	35.69	3.34	-17.72	11.04
100	4154	19.58	35.69	3.34	-17.72	11.16
100	4241	19.73	30.2	3.38	-27.76	11.11
100	4241	19.73	30.2	3.38	-27.76	11.16
100	4241	19.73	30.2	3.38	-27.76	11.14
100	4284	19.87	22.35	3.42	-35.29	11.1
100	4284	19.87	22.35	3.42	-35.29	11.05
100	4284	19.87	22.35	3.42	-35.29	11.07
100	4350	20.31	15.29	3.44	-50.99	11.04
100	4350	20.31	15.29	3.44	-50.99	11
100	4350	20.31	15.29	3.44	-50.99	11
100	4388	20.74	5.1	3.46	-71.07	11.07
100	4388	20.74	5.1	3.46	-71.07	11.07
100	4388	20.74	5.1	3.46	-71.07	10.98
100	4458	21.03	0	3.49	-85.51	10.97
100	4458	21.03	0	3.49	-85.51	10.88
100	4458	21.03	0	3.49	-85.51	10.89
100	4509	21.03	0	3.52	-94.92	10.92
100	4509	21.03	0	3.52	-94.92	10.88
100	4509	21.03	0	3.52	-94.92	10.86
100	4543	21.03	0	3.48	-99.94	10.82
100	4543	21.03	0	3.48	-99.94	10.89
100	4543	21.03	0	3.48	-99.94	10.88

Intake air temp 21 degrees at sea level. Time to ditch the turbo and get something with a 8cm2 and properly ported.. =)

STLSTI · 02-08-2007, 04:08 AM

What turbo are you running?. What is you target boost?.Did you try lowering the WDC before 3500 rpm to try to avoid the spike to 20 psi.

ZuMBLe · 02-08-2007, 04:13 AM

Target boost is 19 psi. The spike is actually pretty minor. The problem is towards the bottom of the log the wgdc is 0 and boost was still rising.

Quote:

Originally Posted by STLSTI

What turbo are you running?. What is you target boost?.Did you try lowering the WDC before 3500 rpm to try to avoid the spike to 20 psi.

WolfPlayer · 02-08-2007, 04:52 AM

Quote:

Originally Posted by ZuMBLe

Target boost is 19 psi. The spike is actually pretty minor. The problem is towards the bottom of the log the wgdc is 0 and boost was still rising.

What turbo and from whom?

t

STLSTI · 02-08-2007, 05:56 AM

Quote:

Originally Posted by ZuMBLe

Target boost is 19 psi. The spike is actually pretty minor. The problem is towards the bottom of the log the wgdc is 0 and boost was still rising.

Wow that's crazy. I guess you are not running the stock VF39. Also I'm a noob but is the first time I see creep so high in the RPM band. I was under the impression that creep was only a problem during initial WOT. BTW did you try to changing the boost temp comp?

ZuMBLe · 02-08-2007, 06:21 AM

WGDC is at 0. I don't see how changing the boost comp would help. =P My boost temp comp is set at -14% below 33 degrees. So its been applied already.. hehe.

Quote:

Originally Posted by STLSTI

Wow that's crazy. I guess you are not running the stock VF39. Also I'm a noob but is the first time I see creep so high in the RPM band. I was under the impression that creep was only a problem during initial WOT. BTW did you try to changing the boost temp comp?

ZuMBLe · 02-08-2007, 06:22 AM

Its a deadbolt TD05H-16G so its kind of expected. Just a excuse to go with a 20g with a 8cm2. Interesting to see it logged. This is real boost creep I think. Nothing you can do with a tune will fix that. Haha..

Quote:

Originally Posted by WolfPlayer

What turbo and from whom?

t

crystal_Imprezav · 02-08-2007, 06:33 AM

Thats creep ok, looks very similar to my last tune of Eddies car:

ZuMBLe · 02-08-2007, 07:05 AM

Well, hopefully people will now know to log before going around screaming saying they have boost creep. These two examples are real boost creep. If your logs look similar something mechanical needs to be done to fix it.

RdRacer301 · 02-10-2007, 03:31 PM

Hehe. I was screaming boost creep before I logged. But, I had experience with creeps before on different cars, so it wasn't hard for me diagnose it. But yeah, +1 on the need for a mechanical fix. I ported wg before, but I'm too lazy to pull the turbo just to port the wg. I think I'm going down th meth route as Jeff has suggested. It would be nice to feel what chilled 22psi feels like.

Jeff, I'll get you more logs with the latest revised map soon. Been a little busy lately.

02-10-2007, 03:31 PM	#10
RdRacer301 Spec C Club Car: 05 OBP STi Fav Mod: My Right Foot Location: Rockville, MD Posts: 2,486 Join Date: Oct 2004 Trader Rating: (1)	Hehe. I was screaming boost creep before I logged. But, I had experience with creeps before on different cars, so it wasn't hard for me diagnose it. But yeah, +1 on the need for a mechanical fix. I ported wg before, but I'm too lazy to pull the turbo just to port the wg. I think I'm going down th meth route as Jeff has suggested. It would be nice to feel what chilled 22psi feels like. Jeff, I'll get you more logs with the latest revised map soon. Been a little busy lately. This ad is not endorsed by this member. Please register or login to hide this ad.

02-08-2007, 04:08 AM	#2
STLSTI Professional STI Driver Car: 07 335 Fav Mod: NOISE Location: Parkland FL Posts: 424 Join Date: Aug 2004 Trader Rating: (4)	What turbo are you running?. What is you target boost?.Did you try lowering the WDC before 3500 rpm to try to avoid the spike to 20 psi.

02-08-2007, 06:33 AM	#8
crystal_Imprezav Spec C Club Car: Slow 05 STi Fav Mod: Loping Idle Location: Chewy's Garage Posts: 1,861 Join Date: Mar 2005 Trader Rating: (11)	Thats creep ok, looks very similar to my last tune of Eddies car:

02-08-2007, 07:05 AM	#9
ZuMBLe Senior STI Driver Car: 05 CGM FXT Location: NY Posts: 323 Join Date: Feb 2006 Trader Rating: (2)	Well, hopefully people will now know to log before going around screaming saying they have boost creep. These two examples are real boost creep. If your logs look similar something mechanical needs to be done to fix it.