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Discussion Starter #1
I just want to get opinions on my logs. These are 3rd gear pulls where egt reaches max of 850C. I am runing 1.20 pounds of boost, around 17.5psi on 92 octane with FPbig28. Outside temperature is around 40F. Intake temps around 65F. It seems to me that I am a little lean between 3000 - 4000 rpm range, and my timing drops to 7 - 8. On higher gear gets pulled down to 5.

TIME RPM TIMING O2
------ -------- -------- -----
1.06 3570.0 29.0 0.5 1.56
1.24 3609.0 26.0 0.74 0.0
1.41 3652.0 21.0 0.8 0.0
1.58 3730.0 17.0 0.8 0.0
1.76 3801.0 13.0 0.84 0.0
1.94 3871.0 7.0 0.86 0.0
2.12 3949.0 8.0 0.88 0.0
2.3 4047.0 8.0 0.9 0.0
2.48 4160.0 8.0 0.9 0.0
2.65 4250.0 8.0 0.9 0.0
2.83 4316.0 8.0 0.9 0.0
3.01 4414.0 8.0 0.9 0.0
3.18 4469.0 9.0 0.9 0.0
3.36 4609.0 9.0 0.92 0.0
3.54 4695.0 10.0 0.92 0.0
3.71 4754.0 10.0 0.92 0.0
4.13 4961.0 10.0 0.92 0.0
4.31 5027.0 10.0 0.92 0.0
4.48 5125.0 11.0 0.92 0.0
4.66 5207.0 12.0 0.92 0.0
4.84 5309.0 12.0 0.92 0.0
5.02 5375.0 13.0 0.92 0.0
5.2 5469.0 13.0 0.92 0.0
5.38 5543.0 14.0 0.92 0.0
5.55 5621.0 14.0 0.92 0.0
5.73 5688.0 14.0 0.92 0.0
5.91 5785.0 14.0 0.92 0.0
6.08 5879.0 16.0 0.92 0.0
6.27 5934.0 16.0 0.92 0.0
6.44 5996.0 15.0 0.92 0.0
6.62 6082.0 15.0 0.92 0.0
6.8 6180.0 15.0 0.92 0.0
6.99 6223.0 15.0 0.92 0.0
7.16 6309.0 16.0 0.92 0.0
7.34 6328.0 16.0 0.94 0.0

Another run; this time I stepped on the gas at 4000rpm

0.18 4180.0 9.0 0.92 0.0
0.36 4266.0 8.0 0.94 0.0
0.54 4324.0 8.0 0.94 0.0
0.71 4410.0 8.0 0.94 0.0
0.89 4500.0 8.0 0.94 0.0
1.07 4609.0 8.0 0.94 0.0
1.25 4703.0 9.0 0.94 0.0
1.43 4754.0 9.0 0.94 0.0
1.6 4813.0 9.0 0.94 0.0
1.78 4918.0 10.0 0.94 0.0
1.96 5004.0 11.0 0.94 0.0
2.13 5082.0 11.0 0.94 0.0
2.33 5164.0 11.0 0.94 0.0
2.5 5242.0 12.0 0.94 0.0
2.68 5340.0 12.0 0.94 0.0
2.86 5414.0 12.0 0.94 0.0
3.03 5500.0 13.0 0.94 0.0
3.22 5559.0 13.0 0.94 0.0
3.4 5641.0 13.0 0.94 0.0
3.57 5703.0 14.0 0.94 0.0
3.75 5781.0 14.0 0.94 0.0
3.93 5863.0 14.0 0.94 0.0
4.1 5941.0 15.0 0.94 0.0
4.29 6020.0 16.0 0.94 0.0
4.46 6063.0 16.0 0.94 0.0
4.64 6148.0 16.0 0.94 0.0
4.82 6223.0 16.0 0.94 0.0
4.99 6281.0 16.0 0.94 0.0
5.17 6336.0 16.0 0.94 0.0
5.35 6422.0 16.0 0.94 0.0
5.52 6473.0 17.0 0.94 0.0
5.71 6516.0 17.0 0.94 0.0
5.88 6598.0 17.0 0.94 0.0
6.06 6645.0 17.0 0.94 0.0
6.24 6703.0 17.0 0.94 0.0
6.42 6738.0 17.0 0.94 0.0
6.6 6789.0 18.0 0.94 0.0
6.77 6832.0 17.0 0.94 0.0
6.95 6738.0 26.0 0.94 0.0 --> Let off the gas
7.12 6320.0 38.0 0.46 0.0

Thanks for any comments....

Cagri
 

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First off, tuning advice isn't electronics tech. This goes in general tech.

Second, it's a pain in the ass to sort through that data in numerical form when the columns don't even line up. But I'm a trooper and I looked at it anyway... heh

Your timing went in the toilet on the first run at 3730 RPM. .80v o2 is too lean.

The second run is useless because it started without timing (8 deg). Make your pulls in 3rd gear. With the car in gear, get the RPMs steady at the RPM you want to start the pull at, turn the logger on, lift completely, then go WOT immediately. If you roll into the throttle too slowly, or go WOT without lifting first, it's possible to start the pull with knock and low timing. You need to start the pull with good timing so you have something to work with.

Based on the first run, it needs some fuel in the 3500-4000 area. The rest of the run is kinda useless.. once the timing goes in the toilet you have to fix the problem spot, then repeat the pull to see what happens with good timing (you'll likely find another problem spot after the first one.. fix it.. repeat).
 

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Discussion Starter #4
while the turbo spools up, the o2 readings go really lean, and my timing drops to 7 - 8, you are right I should probably richen things up around 3000 - 4000 rpm range where I spool most of the time.

In the second run I was kind of late to start the logger. I am going to do some more logs today.
 
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