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Old 06-08-2013, 09:49 PM   #1
Silentbobs
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Default 2008 SpecB Cobb OTS Stage 2 Date Logs with knock :(

Hello all, Recently picked up an 08 Spec B. Love the car. I have a CNT catted DP and SPT exhaust. No other performace mods. I just went and did some data logging and would like a review.

Stage 2 OTS cobb map. 5000 FT elevation.

Logs were in 4th gear from 2500 to 6700 rps. 40 to almost 120 mph

Log 1
https://docs.google.com/spreadsheet/...UE&usp=sharing

Log 2
https://docs.google.com/spreadsheet/...mc&usp=sharing



Logs 1 week later


Log 3
https://docs.google.com/spreadsheet/...kE&usp=sharing


Log 4
https://docs.google.com/spreadsheet/...FE&usp=sharing









Thanks!!
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Last edited by Silentbobs; 06-30-2013 at 11:33 PM. Reason: Added 2 more Logs
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Old 06-08-2013, 11:12 PM   #2
Chicago AJ
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I'm new to reading logs so don't take anything I say as good or bad until someone else chimes in, but I'll give my opinions.

The only thing that would be concerning to me would be the feedback knock in the first log and the fine knock learn in the second. Everything else seems to be in the normal range (the knock learns are too [except going over -2.0] but I'm not sure if they should be there consistently like that).

*waits for someone else*
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Old 06-09-2013, 09:48 AM   #3
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Yes, im new as well. I noticed that the knock was adjusting down towards 0 so thats a good sign.

On the 2nd log i went up a slight hill at the begining of the log. I wonder if that has anything to do with that knock. Ill have to find a better road next time.
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Old 06-09-2013, 12:45 PM   #4
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Could be something loose in your engine bay rattling around. But it's not on your other log so I don't know what to make about it, lol.
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Old 06-09-2013, 07:57 PM   #5
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No else wants to take a stab at my data logs? Really could use some input...
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Old 06-10-2013, 04:00 AM   #6
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Quote:
Originally Posted by Silentbobs View Post
No else wants to take a stab at my data logs? Really could use some input...
Your best bet is to wait for Bill from Cobb to chime in and help you out. I'm curious myself so I'll be tuned in, no pun intended. BTW, congrats on picking up the Spec B, such a rare beauty.
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Old 06-10-2013, 08:32 AM   #7
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Hopefully cobb will chime in this morning. You aren't reachinfg target boost and you are tapering a bit much. Boost error is greater than 1 for your whole run. Maybe the altitude though, of this i am unsure, as i have little experience with high altitudes and tuning. Cobb maps are supposed to be acceptable for this though.
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Old 06-10-2013, 09:36 AM   #8
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Logs look alright.
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Old 06-10-2013, 11:57 AM   #9
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Hes the notes off the cobb site for stage 2 91 oct

 Stage2 91 MTv301
o Fuel Requirements: 91 - 92 octane or better
o Intake Requirements: Stock airbox and stock air filter only
o Exhaust Requirements: Upgraded turbo-back exhaust
o Boost Targets: ~16.0psi peak boost pressure tapering down to ~13.0psi by the 6900RPM redline, +/- 0.8 psi


So it looks like im hitting 16psi although its not held for long at all and it tapers really fast and goes way below 13 psi. So ya thats prolly the elevation.
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Old 06-12-2013, 01:38 PM   #10
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If you look at your second log, the fine knock goes from 0.7 back to 1 which is bad. it's never good if your feedback or fine increase with already pulled timing.
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Old 06-12-2013, 07:05 PM   #11
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Quote:
Originally Posted by Nimbus09 View Post
If you look at your second log, the fine knock goes from 0.7 back to 1 which is bad. it's never good if your feedback or fine increase with already pulled timing.


What do you suggest i do? More data logging, to see if its still doing this?
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Old 06-13-2013, 01:03 AM   #12
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my approach would be:
1) fresh tank of gas
2) reset ecu (pull one of the battery cables, pump brake, reconnect)
3) go out for a 10 mile drive
4) turn car off, turn it back on
5) do at least two more logs, 3rd gear pulls (edit: you have a 6spd, 4th is better), WOT to redline, back to back
6) whatever your second log looks like, that's the truth

if you're still seeing more timing pulled after an already non-zero value, i'd back off on the tune (less timing, through your AP being one option), etc for diagnosing knock

let us know what happens!

Last edited by Nimbus09; 06-13-2013 at 03:19 AM.
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Old 06-23-2013, 05:56 AM   #13
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Added 2 new logs, please post comments, good or bad!!
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Old 06-23-2013, 11:29 AM   #14
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Elevation definitely plays a big factor in boost dropping quickly after reaching target so I wouldn't worry much about that. However, you are still showing quite a bit of knock around the same RPM at WOT in both of your new logs. Both logs are also showing fine knock learn of over -2.45. This is a bad sign.

I'd recommend that you stop going WOT until you get a protune. Spend the money now on a good protune from one of the local tuners like theboostcreep, MAC autosport, etc. and ensure you keep the motor safe.

I'd also recommend getting an aftermarket boost control solenoid from Grimmspeed or another manufacturer and possibly a better fuel pump before getting the tune. This will help prevent the boost from tapering so fast and will allow you to push more boost safely with the additional fueling.
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Old 06-23-2013, 01:42 PM   #15
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Ya, dunno what the deal is. I had someone mention to me that my car could have a very sensitive knock sensor, and it may need to be moved.

Would be kinda silly to use the cobb OTS stage 2 tune and have it blow up the motor. That couldnt be good business.
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Old 06-25-2013, 07:31 PM   #16
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Constantly underboosting with quite a bit of high RPM FLKC - I'd get it checked out. In the mean time you can use ATR to knock down your base timing between 1.5 to max load and 4k to redline about 3 deg. That should stop the knock until you can get it checked out.

If you find that dropping the timing doesn't help at all, then you can start thinking about something rattling or an oversensitive sensor, but I don't think that's your problem. That looks like real knock to me (high load, high RPM, consistent). The cause could be anything from a failing fuel pump, clogged fuel filter, bad MAF readings, lousy fuel, etc.

That's the worst place to have knock, you need to get rid of it ASAP.
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Old 06-26-2013, 10:30 AM   #17
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Quote:
Originally Posted by the suicidal eggroll View Post
Constantly underboosting with quite a bit of high RPM FLKC - I'd get it checked out. In the mean time you can use ATR to knock down your base timing between 1.5 to max load and 4k to redline about 3 deg. That should stop the knock until you can get it checked out.

If you find that dropping the timing doesn't help at all, then you can start thinking about something rattling or an oversensitive sensor, but I don't think that's your problem. That looks like real knock to me (high load, high RPM, consistent). The cause could be anything from a failing fuel pump, clogged fuel filter, bad MAF readings, lousy fuel, etc.

That's the worst place to have knock, you need to get rid of it ASAP.
Damn, thanks for the info, im a tuning noob, but i did get the ATR from cobb so ill look into dropping the timing asap.

After that i guess cleaning the MAF would be an somthing easy i could do. I know the previous owner of the car had a ****ty SPT intake on the car. He took it off when it started acting up. Now the stock air box has a perrin dry pannel filter. Tempted to pull that out too and just get a stock filter.

Thanks again, maybe ill see you around, im in Henderson off 120th. Notice your in Broomfield. So ya pretty close.
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Old 06-26-2013, 02:15 PM   #18
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In for follow up. My stock map is choppy too, been looking for OTS possibilities but this is making me think twice..
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Old 06-27-2013, 10:48 AM   #19
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Maybe some of the Cobb guys will chime in on these logs.
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Old 06-30-2013, 09:01 AM   #20
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Quote:
Originally Posted by the suicidal eggroll View Post
Constantly underboosting with quite a bit of high RPM FLKC - I'd get it checked out. In the mean time you can use ATR to knock down your base timing between 1.5 to max load and 4k to redline about 3 deg. That should stop the knock until you can get it checked out.

If you find that dropping the timing doesn't help at all, then you can start thinking about something rattling or an oversensitive sensor, but I don't think that's your problem. That looks like real knock to me (high load, high RPM, consistent). The cause could be anything from a failing fuel pump, clogged fuel filter, bad MAF readings, lousy fuel, etc.

That's the worst place to have knock, you need to get rid of it ASAP.


Ok, so i have looked at the stage 2 map but I dont really know what to change to lower the timing, there are 2 or 3 diffrent tables for timing.

I was wondering if i could just try to use the ACN stage 2 map. Its for known states that have less then ideal gas. Reflash it, dirive around 20 miles, then try some 4th gear data logs. If the FLKC is still present then try somthing else.
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Old 06-30-2013, 09:03 AM   #21
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Quote:
Originally Posted by the suicidal eggroll View Post
Constantly underboosting with quite a bit of high RPM FLKC - I'd get it checked out. In the mean time you can use ATR to knock down your base timing between 1.5 to max load and 4k to redline about 3 deg. That should stop the knock until you can get it checked out.

If you find that dropping the timing doesn't help at all, then you can start thinking about something rattling or an oversensitive sensor, but I don't think that's your problem. That looks like real knock to me (high load, high RPM, consistent). The cause could be anything from a failing fuel pump, clogged fuel filter, bad MAF readings, lousy fuel, etc.

That's the worst place to have knock, you need to get rid of it ASAP.


Ok, so i have looked at the stage 2 map but I dont really know what to change to lower the timing, there are 2 or 3 diffrent tables for timing.

I was wondering if i could just try to use the ACN stage 2 map. Its for known states that have less then ideal gas. Reflash it, dirive around 20 miles, then try some 4th gear data logs. If the FLKC is still present then try somthing else.

If i drive currently, i just stay below 3500 rpm. So no boost for me atm.
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Old 06-30-2013, 02:46 PM   #22
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Quote:
Originally Posted by Silentbobs View Post
Ok, so i have looked at the stage 2 map but I dont really know what to change to lower the timing, there are 2 or 3 diffrent tables for timing.

I was wondering if i could just try to use the ACN stage 2 map. Its for known states that have less then ideal gas. Reflash it, dirive around 20 miles, then try some 4th gear data logs. If the FLKC is still present then try somthing else.

If i drive currently, i just stay below 3500 rpm. So no boost for me atm.
base timing A and B (if you have them, I've never looked at the Spec B map). The ACN map might also be a good place to start.
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Old 06-30-2013, 11:36 PM   #23
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Quote:
Originally Posted by the suicidal eggroll View Post
base timing A and B (if you have them, I've never looked at the Spec B map). The ACN map might also be a good place to start.

OK loaded a the stage 2 ACN map, went out and drove around easy for 15 miles or so then went and took these logs.

Log 1
https://docs.google.com/spreadsheet/...Hc&usp=sharing


Log 2
https://docs.google.com/spreadsheet/...lE&usp=sharing



Still underboosting, no knock in the first log, just a bit in the 2nd.
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Old 06-30-2013, 11:57 PM   #24
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Boost error still sucks, but knock is better. The car still needs a good tune but at least it's running safer than it was before.
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Old 07-01-2013, 05:57 AM   #25
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I was really thinking about ordering a Grimspeed ebc, and a walbro 255 fuel pump. I could get thoes and a good tune right after and be set.
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