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2016 STI Fine Knock Learn after Protune
2016 STI Fine Knock Learn after Protune
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Old 04-19-17, 11:46 AM   #11
OHappyDay
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Default Re: 2016 STI Fine Knock Learn after Protune

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Originally Posted by MarkWeso View Post
Everything looks fine. The newer STi's are SUPER sensitive to knock. Subaru changed the system to be very proactive in dealing with potential kncok situations vs. older model STi's. I think it was around 2012 that they did this. This is why you don't see many ringlanding failures of late (most failures nowadays are spun bearings). Anything -2.8 and under is normal and it is normal to see over -2.8 on occasion. If your DAM stays at 1 you are fine. If you see extraordinarily high knock seemingly at random it's probably the ECU being proactive in pulling timing or bad gas. I don't see anything here to be worried about.

Do you have a wideband sensor post turbo on your set up? If not, you should get one to ensure proper AF ratio. With the level of modification you have I am surprised that your tuner didn't highly recommend/require a wideband sensor (if he didn't).
Hey MarkWesco,

Thank you for the detailed explanation of the knock sensor. When I got my car tuned, he connected a wideband into the top bung of my Cobb downpipe for accurate readings. Would it would wise to buy one and have it mounted on my dash for monitoring?
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Old 04-19-17, 03:13 PM   #12
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Default Re: 2016 STI Fine Knock Learn after Protune

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Originally Posted by OHappyDay View Post
Hey MarkWesco,

Thank you for the detailed explanation of the knock sensor. When I got my car tuned, he connected a wideband into the top bung of my Cobb downpipe for accurate readings. Would it would wise to buy one and have it mounted on my dash for monitoring?
I'd recommend getting a wideband, too. It's even better when it's wired into the rear O2 on the car so you can datalog it with your Accessport.
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Old 04-19-17, 04:45 PM   #13
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Default Re: 2016 STI Fine Knock Learn after Protune

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Originally Posted by OHappyDay View Post
Right now I'm making 260 WHP on a DynoJet and I forget how much torque, I would have to look at my dyno sheet.

Also an update: My tuner got back to me and said those numbers are nothing to worry about. I'm planning on going E85 within the next month along with a Tomei equal length header/up pipe.
Oh you still have the stock downpipe installed?
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Old 04-19-17, 05:08 PM   #14
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Default Re: 2016 STI Fine Knock Learn after Protune

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Oh you still have the stock downpipe installed?
Negative, I have a list of my mods on the first page
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Old 04-21-17, 04:01 AM   #15
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Default Re: 2016 STI Fine Knock Learn after Protune

I've noticed that with the gas I have available here in Nevada if I fill just anywhere I get really erratic FKL and FBK readings. So I tend to just stick with the shell gas. Both readings stay pretty stable on that gas. DAM never ever moves. So lesson learned for me!


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Old 04-22-17, 10:07 AM   #16
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Default Re: 2016 STI Fine Knock Learn after Protune

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Originally Posted by OHappyDay View Post
Hey MarkWesco,

Thank you for the detailed explanation of the knock sensor. When I got my car tuned, he connected a wideband into the top bung of my Cobb downpipe for accurate readings. Would it would wise to buy one and have it mounted on my dash for monitoring?
That is definitely adequate. Wideband gauge would be the only one I run with your set up. No need for anything else other than maybe oil temp and/or pressure. Don't worry about the small knock reading you get. If both my knocks stay -2.8 or under and the dam stays at 1, I don't worry about it. That's normal. I've dropped DAM once or twice and just put around in I until it comes back (once for bad gas and once while spinning the tires in wet weather. The change to not being under load confuses the ecu and it dropped the dam.)
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