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Old 09-11-2013, 03:26 AM   #26
sebi1990
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The logs look good. There is a single count (-1.4) of fine knock learning in the first log that is ramping back to zero in that log and the next. Fine knock learning is a little tricky to analyze as it can happen from a prior event and is re-applied over and over in a load/rpm range surrounding event, so it is hard to tell when it was learned (sometimes you can get this correction at WOT when lifting off the throttle abruptly at the end of a WOT run which is just noise). I would get a few more of the same type of logs just to see additional data, if you can do so safely, but a single count of occasional fine knock learning is not a big deal.

We usually recommend the so-called "top tier" gas, which usually has more consistent results. We've seen issues with Costco gas before, but that is hard to apply universally as likely Costco gets gas from a wide variety of suppliers at different Costco throughout the country, so results may vary.

Bill

Hey Bill thanks for your help what would you recomend ss top tier gas. Also I have logs sftet rotella oil change I'd like you to take a look at them they were taken with shell vpowet however the temperatures at the time were a lot higher then in the previous logs.
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Old 09-11-2013, 08:25 AM   #27
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Hey Bill thanks for your help what would you recomend ss top tier gas. Also I have logs sftet rotella oil change I'd like you to take a look at them they were taken with shell vpowet however the temperatures at the time were a lot higher then in the previous logs.
Sure, go ahead and post a link to the new logs.

I would go to your local forums and see what top tier gas seems to work best in your area for others.

Bill
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Old 09-11-2013, 01:30 PM   #28
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Sure, go ahead and post a link to the new logs.

I would go to your local forums and see what top tier gas seems to work best in your area for others.

Bill
Here is the log to I was talking about:

https://docs.google.com/file/d/0B1mT...it?usp=sharing
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Old 09-12-2013, 09:27 AM   #29
Cobb Tuning
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Here is the log to I was talking about:

https://docs.google.com/file/d/0B1mT...it?usp=sharing
Double count of fine knock learning at some point in this log. If it was extreme heat and/or more heatsoaked motor (stop and go driving or extended idling shortly before WOT run) it may be a normal, but I would get a few more logs to verify.

Bill
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Old 09-12-2013, 10:06 AM   #30
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Double count of fine knock learning at some point in this log. If it was extreme heat and/or more heatsoaked motor (stop and go driving or extended idling shortly before WOT run) it may be a normal, but I would get a few more logs to verify.

Bill
Could a different type of oil make a difference? I will get 3 logs in one after another so that you have good data.
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Old 09-12-2013, 10:48 AM   #31
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Could a different type of oil make a difference? I will get 3 logs in one after another so that you have good data.
No, oil type is going to make any material difference as far as knock resistance.

Bill
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Old 09-12-2013, 11:23 AM   #32
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No, oil type is going to make any material difference as far as knock resistance.

Bill
I also was suprised becouse the csr had a black oil filter and the dealer sold me a blue one..
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Old 09-12-2013, 11:28 AM   #33
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I also was suprised becouse the csr had a black oil filter and the dealer sold me a blue one..
The blue oil filter is the "newer" one that a dealership would carry although cars may still come from the factory with the previous black oil filter (not sure).

Bill
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Old 10-08-2013, 07:24 PM   #34
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Old 10-08-2013, 08:36 PM   #35
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I would flash the 91 map and run it with 93 in the tank. If that gets rid of your knock then learn how to use ATR and remove a couple of degrees of timing in those troublesome areas of your 93 map. Just a suggestion.
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Old 10-09-2013, 05:25 PM   #36
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These new logs seem to be about on par with what you've sent in the past. There is still a small amount of fine knock learning present. Have you tried switching over to a top tier gas station? It's absolutely possible that a slightly lower quality fuel will contribute to these minor corrections.

Marshall@COBB
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Old 10-09-2013, 06:45 PM   #37
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Yes the knock remained the same it didn't matter what i put into it I tried both costco and mobil gas should I try BP?
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Old 10-09-2013, 06:46 PM   #38
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What about the timing retard should I maybe try doing that?
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Old 10-09-2013, 06:54 PM   #39
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Switch to the 91 octane map. That's what I did and it cleaned up my logs. It's only like a 5-10hp loss and it's safer. I have a feeling our 93 octane gas may not be that great around here. With winter coming the gas is only going to get worse.
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Old 10-09-2013, 07:12 PM   #40
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Yeah I will re flash it tomorrow.
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Old 10-11-2013, 12:58 AM   #41
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So I've re flashed from 93+SF v300 to the new 311 it looks promising I took a few logs and here is what came up:
1.
https://docs.google.com/file/d/0B1mT...?usp=drive_web
2.
https://docs.google.com/file/d/0B1mT...?usp=drive_web

I think the feedback knock might be from the noise the engine is making because I've noticed that in the 2nd log i started closer to the 3k rpm range and no knock appeared. However I will get 3 longs one after another...hopefully they will both be knock free!
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