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Old 02-07-2012, 06:37 PM   #1
nature0220
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Default 2011 STi Sedan Data Log

I currently have Cobb Short Ram intake and Invidia Q300 catback installed on my car. The map I am using right now is "Stage1+SF 93 v300 Boost Select", and I am runing on Chevron 94 Octane.

Can someone please take a look at my data log, see if everything is alright. Thank you.

http://www.divshare.com/download/16740270-df5

http://www.divshare.com/download/16740271-5a9
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Last edited by nature0220; 02-07-2012 at 09:14 PM.
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Old 02-08-2012, 02:00 AM   #2
snoopy8818
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You have a lot of feedback knock. I would monitor the knock sums of 1-4 and see what cylinder is increasing it.
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Old 02-08-2012, 02:41 AM   #3
nature0220
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Quote:
Originally Posted by snoopy8818 View Post
You have a lot of feedback knock. I would monitor the knock sums of 1-4 and see what cylinder is increasing it.
Sorry, I'm a total noob. So how do I do this?
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Old 02-08-2012, 01:05 PM   #4
snoopy8818
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monitor - datalog settings - check knock sums cylinder 1- 4, its just adding that parameter to be logged.
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Old 02-08-2012, 01:08 PM   #5
nature0220
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ok, I'll do that. Thanx
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Old 02-08-2012, 06:20 PM   #6
nature0220
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here are couple more data log with Knock Sum Cyl 1-4 count
http://www.divshare.com/download/16747022-0e3

http://www.divshare.com/download/16747023-641

I also found that a lot of people were suggusting use the 91 map while keep running on 93 or 94 gas will solve the knock problem, so I also tried that. Seems it solve the knock problem. Only seeing -1.4 and -1.05. Here are the data log
http://www.divshare.com/download/16747026-c4f

http://www.divshare.com/download/16747029-f48

http://www.divshare.com/download/16747030-99b

I also noticed some over boost. While using 93 map the actual boost is 19.15psi and target is 18psi. And When using 91 map the actual boost is 18.85psi and target is 17.5psi.
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Old 02-09-2012, 12:12 AM   #7
snoopy8818
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I just took a look at the logs, you have your boost in kpa, you can change that in the AP so it will log it in psi. I see in one of the logs that you are having a TD boost error of 1.45 psi but there was no feedback knock associated with it. Your knock sums are like mine ( have a 11 STI) they just increase under no load situations. The sensor sucks and knock sums will increment up at idle and at low load. Its just at high load that it would be concerning. In log number 8 you have a -2.8 feedback knock, its due to pedal mash and lift off. You went from 100% throttle to 9.8% and back to 100%, so that is normal, the reason it counted a 2.8 was the knock sum in cylinder 1 incremented at the same time it did in cylinder 3. But whenever you have pedal mash or let off knock can occur and is normal as long as it does not continue to increment up. So you can take off the knock sum monitors. I just wanted to see if it was learned knock being reapplied or actually happening. With knock, your either gonna see it as knock feedback or as fine knock learning. With fine knock learning it learns it so at that given RPM and load it will apply the correction even if its not happening. Once it does not hear it for a while, it will unlearn it. So that was the only reason I wanted to see your knock sums.
If running the 91 map works for you stick with it, it will give you a larger safety margin against knock. This way if you fill up at a gas station you don't normally use you will have some more margin. Its just reduced timing as compared to the 93 map. It will not harm your engine. I live in Vegas and the gas sucks out here and I am running the 91ACN map and had to pull some timing off of that as well. So I have the least aggressive timing map and I pulled some more timing off of it and at the Dyno I did not see any real difference.
If you put up more logs try to get the AP to log in Psi so its easier to read
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Old 02-09-2012, 01:11 AM   #8
nature0220
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Thank you very much for spending your time read my log and explain to me. I guess since the 91 map solves the knocking issue and it's safer to run I'll just stick with it.

My only concern is the over boost, but I guess it's not as crucial as the knocking issue. Instead redo the log I'll probably just convert the current ones to psi tomorrow. I think it's much easier than finding a good time and empty road to do a third gear pull XD.
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Old 02-09-2012, 08:30 AM   #9
snoopy8818
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Yeah it won't hurt the car at all to run lower timing. It might have just been bad gas. Run the tank till its empty and try another station and then just do a realtime map swap to see how it effects it. Your not gonna loose anything really noticeable on a dyno though either way. I was just having a hard time seeing how much of a spike you were having because your log was in Kpa, my gauges are Kpa but I just compare it to the AP and then set my peak by what the AP sees so I don't even convert the numbers. You would figure high end Defi's would come in psi but only come in metric. Go figure.
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Old 02-09-2012, 10:14 PM   #10
nature0220
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Old 02-10-2012, 08:06 AM   #11
snoopy8818
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I would stick with the 91 map, I don't know how your logging both psi and kpa at the same time, but you could just leave it set to psi and remove the kpa and also the per cylinder knock sums to increase your logging resolution. It looking good though.
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Old 02-10-2012, 01:04 PM   #12
nature0220
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In fact, I didn't re log it. I just use excel to convert kpa to psi XD. And thanks a lot for all your advice.
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Old 02-11-2012, 12:20 AM   #13
snoopy8818
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I was wondering how you had it showing both at the same time. You should get the car pro tuned. It will be a major difference. Power is much more smoother. I don't know if you have the low rpm stumble on partial throttle at 2800 RPM but we were able to mitigate it out on my car when I had it as stage 1 and as stage 2. We were also able to cut back on the fueling because it was running rich. Not really a power gain, just smoother.
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Old 02-11-2012, 12:32 AM   #14
nature0220
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IC. The low RPM stumble is a lil annoying. I'll probably get a pro tune, when I have enough money to get all the mods I want.
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