Need opinions - DAM fluctuating
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Got this low 2 days ago. Yesterday I put some octane booster in the tank and right now DAM is at .688 and going up. Hopefully it gets up there and stays. I went back and looked at 4 of my data logs from a month ago and there is no FNL or FBK on any of them so this has to be bad gas right? Also hitting target boost so shouldn't be a leak. Ugh I hate having to worry about this stuff. Last thing I can think of is that it's just the way my wife drives the car (she's hard on stuff).
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I don't know if things have changed on newer cars but the IAM is more important. Fine learning and feedback are localized responses. When they accumulate under certain conditions significantly enough they cause the global response with IAM which pulls back timing everywhere. The car is safe but it tries to add timing advance back until it hits enough trouble again. I will ignore little corrections but like to see the IAM maxed. Per the message from Cobb it sounds like these expectations have changed with them at least, but I doubt the overall knock control strategy has changed.
RomRaider • View topic - Subaru's knock control strategy explained
The main culprit for ill adjusted cars in the past has been a dirty MAF or a leak letting in air after the MAF in the high vacuum area of the intake leading to the turbo. Bad gas should pass - otherwise you are stuck with what you have available. I've chased gas before and it isn't worth it. Octane booster - no way can you sustain that. Look for a mechanical fix or get a tune that manages to deal with the knock better.
Per the girlfriend, I had one guy I flashed stage II as a favor (he was running around with a downpipe but it was a bugeye so not too bad) and he had knock. So I went with him for a log and ended up just teaching him not to go up hills in 5th. That will do your IAM in.
RomRaider • View topic - Subaru's knock control strategy explained
The main culprit for ill adjusted cars in the past has been a dirty MAF or a leak letting in air after the MAF in the high vacuum area of the intake leading to the turbo. Bad gas should pass - otherwise you are stuck with what you have available. I've chased gas before and it isn't worth it. Octane booster - no way can you sustain that. Look for a mechanical fix or get a tune that manages to deal with the knock better.
Per the girlfriend, I had one guy I flashed stage II as a favor (he was running around with a downpipe but it was a bugeye so not too bad) and he had knock. So I went with him for a log and ended up just teaching him not to go up hills in 5th. That will do your IAM in.
Thank you for the response. As for getting a pro tune, I'm not ready to throw more money at the car. Really considering just uninstalling the AP and going back stock. I have a feeling the problem will persist but won't see it and atleast with no AP I won't have any warranty troubles. Also for a mechanical fix, I guess I could take it to a local shop and have them check for leaks somewhere? Sounds like those are my only options unless it really is just my wife's crappy driving habits. Could a problem ever arise with just leaving things alone for now and letting the DAM and the car just do its thing on the stage 1 OTS map.
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Yes, I plan on using the Valero down the road. I guess decent gas is just not widely available in my area. DAM has been exactly at 1 for almost a week now that hasn't happens in over 6 weeks
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