N54 91 ACN Timing corrections

Velocity+ · 09-21-2017, 04:56 PM

Hi,

I would appreciate if someone could take at my logs?

https://datazap.me/u/mspringer/cobb-...og=0&data=2-15

I'm running a Cobb N54 Stage 1 Sport OTS tune and think I'm seeing large timing corrections across multiple cylinders in the logs. I always use Shell V-power 91 but it seems like there still isn't enough octane for this tune.

I had my spark plugs replaced 5000 miles ago, I have index 12 injectors, brand new coils and a walnut blast was done 3000 miles ago.

The timing corrections look quite bad so it would be great if someone could take a look.

I contacted Cobb about this issue and they suggested that I switch to their Drive map but it feels sooo much slower.

Is anyone in Arizona, California or Nevada using a little bit of E85 to boost their octane?

Velocity+ · 09-21-2017, 06:19 PM

The log was taken in 3rd gear uphill. Would this affect the timing?

sbrach · 09-24-2017, 10:36 AM

I'm in AZ, running MHD Stage 2 on an N55 and was seeing large timing corrections on all cylinders. Replacing plugs and coils helped but did not completely resolve. I did notice that when I logged at 8am yesterday and it was 70 degrees out I only had a brief 3degree correction on one cyl. I m still on the stock intercooler. I think a 7" FMIC would make a big difference in AZ. I added 3 gallons of E85 yesterday afternoon and still got minor corrections on all cylinders when ambient was back above 90 degrees.

09-21-2017, 04:56 PM	#1
Velocity+ Private First Class 117 Rep 101 Posts Drives: 2018 M240i RWD Join Date: Jan 2017 Location: San Diego, CA iTrader: (0)	N54 91 ACN Timing corrections Hi, I would appreciate if someone could take at my logs? https://datazap.me/u/mspringer/cobb-...og=0&data=2-15 I'm running a Cobb N54 Stage 1 Sport OTS tune and think I'm seeing large timing corrections across multiple cylinders in the logs. I always use Shell V-power 91 but it seems like there still isn't enough octane for this tune. I had my spark plugs replaced 5000 miles ago, I have index 12 injectors, brand new coils and a walnut blast was done 3000 miles ago. The timing corrections look quite bad so it would be great if someone could take a look. I contacted Cobb about this issue and they suggested that I switch to their Drive map but it feels sooo much slower. Is anyone in Arizona, California or Nevada using a little bit of E85 to boost their octane?
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09-21-2017, 06:19 PM	#2
Velocity+ Private First Class 117 Rep 101 Posts Drives: 2018 M240i RWD Join Date: Jan 2017 Location: San Diego, CA iTrader: (0)	The log was taken in 3rd gear uphill. Would this affect the timing?
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09-24-2017, 10:36 AM	#3
sbrach Private 7 Rep 46 Posts Drives: 2011 DCT 135i Join Date: Sep 2017 Location: Surprise, AZ iTrader: (0)	I'm in AZ, running MHD Stage 2 on an N55 and was seeing large timing corrections on all cylinders. Replacing plugs and coils helped but did not completely resolve. I did notice that when I logged at 8am yesterday and it was 70 degrees out I only had a brief 3degree correction on one cyl. I m still on the stock intercooler. I think a 7" FMIC would make a big difference in AZ. I added 3 gallons of E85 yesterday afternoon and still got minor corrections on all cylinders when ambient was back above 90 degrees.
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