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Old 12-25-2008, 12:11 AM   #1
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Default What is this graph telling you?

After a couple months of messing with fuel pumps, manual boost controllers and autotuning, I finally took a datalog I am willing to share with the group. This was a rolling pull through third gear and a very little bit in fourth. My AFRs look ok, possibly a bit on the rich side as I dip below 11.5 above 5400 rpm. During this run, the duty cycle maxes out at 71%. Knock kicks up a bit above 5800 rpm. Max knock value is 0.32 during this run (need to find that spot that hit 0.86 though...) but I am not hitting the threshold where it is pulling timing.

There is an annoying dip in boost when I change gears that slowly builds. This is contrary to the performance I used to get with my EBC where it would build quickly then taper off. Any idea that this could be attributed to?

Would also appreciate any insights you all gather from this chart.
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Old 12-25-2008, 12:16 AM   #2
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Ok, this is strange. This is a part of my datalog where I had been running at highway speeds for a while and floored it in 5th gear. Boost is lower though more stable and for some reason the knock is higher and AFRs get more rich. It also pulled up to 3 degrees of timing. Looks like there is something odd in my map at 3550 and 3850 rpm... Any ideas??
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