Overboost while Datalogging w/ Cobb AP

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Aug 2, 2009, 11:45 AM

MaximumYin

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Overboost while Datalogging w/ Cobb AP

Took my friend's X out for a run. The car is stock except for a HKS Panel filter, Nisei UICP, and Cobb AP v2 running the HKS Stage 1 93 Oct Map. Here's what we saw...

Code:

Sec	MPH	RPM	Knock	Boost (PSI)
0	8.7	1946	0	17.55
0.29	8.7	2371	0	18.35
0.57	13.67	2727	0	19.87
0.88	13.67	3209	0	22.63
1.14	13.67	3680	0	26.32
1.42	21.13	4273	0	25.38
1.73	21.13	4396	0	4.5
2.01	26.1	4152	0	3.12
2.3	26.1	3765	0	15.59
2.56	26.1	3399	0	18.35
2.88	27.34	3614	0	24
3.16	27.34	3897	0	31.18
3.42	32.31	4251	0	37.64
3.71	32.31	4615	0	38.22
4.01	32.31	4996	0	35.68
4.29	41.01	5418	0	33.94
4.6	41.01	5769	0	33.36
4.9	48.47	6122	0	33.36
5.2	48.47	6471	0	33.36
5.46	54.68	6762	0	32.99
5.78	54.68	7075	0	14.79
6.07	54.68	6382	0	3.34
6.37	58.41	5372	0	19.29
6.66	58.41	5454	0	29.88
6.92	60.89	5502	0	38.8
7.21	60.89	5711	0	38.8
7.5	60.89	5868	0	36.11
7.8	65.87	6082	0	33.72
8.07	65.87	6297	0	32.99
8.36	70.84	6421	0.7	32.99
8.66	70.84	6637	0.35	33.14
8.95	70.84	6830	0.35	32.99
9.21	75.81	6388	0	7.98

Thoughts? These boost numbers seem way out of whack with what target boost is according to Cobb for this calibration (24psi +/- 0.8)! The car seems to drive fine with no issues, so when we saw these numbers we were a bit concerned.