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Old 12-05-2019, 11:57 PM   #1
OHTOORECKS
Scooby Newbie
 
Member#: 159723
Join Date: Sep 2007
Chapter/Region: MWSOC
Location: Michigan, USA
Vehicle:
2016 Forester XT
Crystal White Pearl

Default 2016 FXT lots of knock part throttle

I am noticing a lot of knock events on my FXT on an OTS Stage 1 tune. Is this DAM dancing around and the feedback and fine learning knock I'm seeing enough to cause concern? I use Costco 93 octane gas, maybe I should try Shell and see if it clears up? Maybe go to the 91 octane map? Or just ignore it becuase it's fine at WOT? Any insight would be appreciated!

Mods:
K&N drop in panel filter
Go Fast Bits BOV (stock plastic one was leaky)
Removed the resonator from the airbox because I like turbo noises :|

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Old 12-08-2019, 06:50 AM   #2
Hostil.Hatch
Scooby Newbie
 
Member#: 509118
Join Date: Dec 2019
Default Get A Protune

So first off, if you see your DAM changing, immediately stay out of boost. Feedback knock isn't as important but since your DAM is changing then it could be a real problem. Stage 1 for FXT your year is stock intake and filter so if you've changed either of them in any way then you shouldn't run the map. Running 93 while a tune requires 91 will not negatively effect your car, running a lower octane would. My suggestion is to get a protune.
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Old 12-09-2019, 07:16 PM   #3
ShinjiML
Scooby Specialist
 
Member#: 257231
Join Date: Sep 2010
Chapter/Region: Tri-State
Location: Hudson Valley, NY
Vehicle:
2011 STI ShinjiTuned
DGM

Default

I see knock mainly at low boost and cruising. This is probably why the DAM is dropping, so it doesn't look too bad. However, because you made a few changes to your intake side, the fuel trims are now adding a bit more fuel, so trims are a bit high.

I'd recommend getting a custom tune to work out the little kinks.
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