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Old 04-24-2010, 04:59 PM   #1
Scooby Newbie
Member#: 161507
Join Date: Oct 2007
Location: NNY
2008 WRX 5 Door

Question Knock Correction question...Noob here.

So I got my AP last week and installed it per installation instructions. I am running an SPT CBE and ditched the K&N drop-in for a normal flowing paper filter. Stock motor otherwise, 4EAT tranny. I have been driving the car conservatively, never over 4K RPMS. My question is, what is acceptable for the knock correction? I have seen as low as -6.7 (today, climbing a decent hill, 3rd gear, 4k RPM and groceries in the back ). I have done some research here and on the Cobb Forums, but maybe I am a missing something. Usually with normal driving, I get around -1.4 or so. Using the Stage 1 91 tune with Sunoco 93 Octane gas. Thanks.

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Old 04-25-2010, 08:55 PM   #2
Scooby Newbie
Member#: 161507
Join Date: Oct 2007
Location: NNY
2008 WRX 5 Door


No one has any ideas? I know it's probably a new guy type of question. Just don't want to hurt the family grocery machine. Thanks.
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Old 04-25-2010, 10:31 PM   #3
Scooby Specialist
Member#: 203489
Join Date: Feb 2009
Chapter/Region: SWIC
Location: Reno,nv
03 wrx wagon
flat4/Mayhem Tuning!


yeah your using stage 1 91 use stage 1 93 map
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Old 04-29-2010, 05:51 AM   #4
Scooby Specialist
Member#: 102749
Join Date: Dec 2005
Chapter/Region: SCIC
Location: Fullerton, Ca
2005 impreza STi


It depends on 100 other things. You need a log so we can view a lot of crucial factors that have an affect on the danger related to knock.

If you don't have a custom tune I'm not surprised.
flatthump is offline   Reply With Quote
Old 04-29-2010, 06:34 AM   #5
Scooby Specialist
Member#: 178468
Join Date: Apr 2008
Location: Somerset, NJ
2007 UGM STI
IAG Built


Under normal driving conditions (non-boost low RPM) the ECU will reduce timing for a number of reasons, one of them being to maximize fuel economy. I wouldn't be concerned, it is perfectly acceptable. If you are seeing this in the high RPM range while under boost, then I would investigate further. If your IAM were to drop, then I would be concerned.
ohm is offline   Reply With Quote
Old 04-29-2010, 12:46 PM   #6
Scooby Specialist
Member#: 213288
Join Date: Jun 2009
Chapter/Region: Tri-State
Location: Delran NJ
2007 SWP VF39 WRX
Sti Mikey Tuned


Use the right map with the right Gas.

91oct with ACN Stg1 91 Map
93oct with Stg1 93 Map.
Kupkake is offline   Reply With Quote

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