How accurate is Cobb AP live data monitor

Armito · 09-02-2011, 08:11 AM

Curious as to how accurate the live boost reading is on the Cobb AP?. On Stock map i've seen up to 9.4 psi and on 91 map 19.2 psi. I think those peak readings are more of a spike (throttle closure?) then sustained.

Any inputs from the resident experts ?

* Car is stock 6mt E92 N54

BMWsky · 09-02-2011, 08:23 AM

That is a spike, not sustained. One other thing to mention, a lot of that number has to do with where the measurement is taken.

Ironically, since I installed my Stett CAI and ER FMIC, I see spike boost of high 14's low 15's with sustained numbers in the mid to high 13's on the 93 octane maps. (I used to show spikes up in the 19 to 21 ranges.)

Brey335i · 09-02-2011, 08:23 AM

COBB AP logs spikes, so yes you are correct.

Armito · 09-02-2011, 08:53 AM

Thanks guys.

09-02-2011, 08:11 AM	#1
Armito Nai re! 22 Rep 218 Posts Drives: 2008 E90 M3 - Black Join Date: Apr 2010 Location: Toronto, Ontario iTrader: (3)	How accurate is Cobb AP live data monitor Curious as to how accurate the live boost reading is on the Cobb AP?. On Stock map i've seen up to 9.4 psi and on 91 map 19.2 psi. I think those peak readings are more of a spike (throttle closure?) then sustained. Any inputs from the resident experts ? * Car is stock 6mt E92 N54
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09-02-2011, 08:23 AM	#2
BMWsky Major 24 Rep 1,244 Posts Drives: 335i Join Date: Dec 2010 Location: Webster NY iTrader: (1)	That is a spike, not sustained. One other thing to mention, a lot of that number has to do with where the measurement is taken. Ironically, since I installed my Stett CAI and ER FMIC, I see spike boost of high 14's low 15's with sustained numbers in the mid to high 13's on the 93 octane maps. (I used to show spikes up in the 19 to 21 ranges.)
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09-02-2011, 08:23 AM	#3
Brey335i Banned 112 Rep 4,771 Posts Drives: e46 ///M3 Join Date: Oct 2009 Location: Austin, TX iTrader: (11)	COBB AP logs spikes, so yes you are correct.
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09-02-2011, 08:53 AM	#4
Armito Nai re! 22 Rep 218 Posts Drives: 2008 E90 M3 - Black Join Date: Apr 2010 Location: Toronto, Ontario iTrader: (3)	Thanks guys.
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