How do my Cobb logs look?

derrick603 · 10-18-2011, 03:32 AM

First time logging, Stage 1 Drive on a stock 2007. How does it look?

derrick603 · 10-18-2011, 02:46 PM

Are there any guides available that might help a newbie interpret some of these logs? For example, how many degrees of timing pull would be a concern? How should the wastegate duty cycle look on a healthy n54? Etc.

rader1 · 10-18-2011, 03:01 PM

Im guessing that was a 2nd through 3rd gear pull correct? The logs look good to me, but im not expert others will be far more help. There was a throttle closure right after you shifted into third, did you have DTC on or off?

boom · 10-18-2011, 03:03 PM

Looks good to me. You didn't have any timing dropouts during the pulls - only the shifting. AFR is spot on and when you spiked boost the throttle closed. All well and good.

derrick603 · 10-18-2011, 03:06 PM

Quote:

Originally Posted by rader1

Im guessing that was a 2nd through 3rd gear pull correct? The logs look good to me, but im not expert others will be far more help. There was a throttle closure right after you shifted into third, did you have DTC on or off?

Yes, this was a second to third gear pull. I understand that third shifting into fourth is ideal for logging, but I only have so much road.

DTC was on, but I've noticed that when I get some slippage, the DTC light doesn't seem to come on in the dash anymore like it did before installing the Cobb tune.

derrick603 · 10-18-2011, 03:08 PM

Quote:

Originally Posted by boom

Looks good to me. You didn't have any timing dropouts during the pulls - only the shifting. AFR is spot on and when you spiked boost the throttle closed. All well and good.

Thanks for looking. How much of a timing drop would you consider to be a problem? I'd like to try the Sport map on CA gas and log the result, but I'm not sure how much timing drop is too much.

enrita · 10-18-2011, 03:12 PM

just pull on 3rd and 4th with DTC completely off for a clean log.

rader1 · 10-18-2011, 03:13 PM

Quote:

Originally Posted by derrick603

Yes, this was a second to third gear pull. I understand that third shifting into fourth is ideal for logging, but I only have so much road.

DTC was on, but I've noticed that when I get some slippage, the DTC light doesn't seem to come on in the dash anymore like it did before installing the Cobb tune.

Disable DTC and do another pull, i'd be willing to bet that the throttle closure and boost spike will almost disappear

10-18-2011, 03:32 AM	#1
derrick603 Captain 56 Rep 592 Posts Drives: 2007 335i Join Date: Jun 2010 Location: Fremont, CA iTrader: (0)	How do my Cobb logs look? First time logging, Stage 1 Drive on a stock 2007. How does it look?
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10-18-2011, 02:46 PM	#2
derrick603 Captain 56 Rep 592 Posts Drives: 2007 335i Join Date: Jun 2010 Location: Fremont, CA iTrader: (0)	Are there any guides available that might help a newbie interpret some of these logs? For example, how many degrees of timing pull would be a concern? How should the wastegate duty cycle look on a healthy n54? Etc.
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10-18-2011, 03:01 PM	#3
rader1 Banned 71 Rep 2,197 Posts Drives: Cobb Stage 2+ 135i Join Date: Apr 2011 Location: Roanoke, VA iTrader: (0)	Im guessing that was a 2nd through 3rd gear pull correct? The logs look good to me, but im not expert others will be far more help. There was a throttle closure right after you shifted into third, did you have DTC on or off?
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10-18-2011, 03:03 PM	#4
boom My X5d tows my spec miata to the track. 77 Rep 1,254 Posts Drives: 2010 X5 35d Join Date: Sep 2009 Location: USA iTrader: (0)	Looks good to me. You didn't have any timing dropouts during the pulls - only the shifting. AFR is spot on and when you spiked boost the throttle closed. All well and good.
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10-18-2011, 03:12 PM	#7
enrita Major General 161 Rep 7,377 Posts Drives: 335i - Big turbos Join Date: Sep 2008 Location: Italian in Sweden iTrader: (0)	just pull on 3rd and 4th with DTC completely off for a clean log. __________________ 07 335i AT - MOTIV 750 - MHD E85 BMS flash - BMS PI - JB4G5 - Okada Coils - NGK 5992 Plugs - Helix IC - Snow Stg. 3 - Stett CP - Custom midpipes with 100 HJS Cats - Bastuck Quad - PSS10 - QUAIFE LSD - BMS OCC - Forge DVs - AR OC - ALCON BBK - M3 Chassi - Dinan CP - Velocity M rear Toe arms - Advan RZ-DF - LUX H8 - Level 10 AT upgrade
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