fresh rebuild, car running like crap

[dewdew]

RPM | Knock | Timing | O2

2812 | 0 | 24 | 0.88
2937 | 0 | 24 | 0.88
3156 | 0 | 23 | 0.86
3406 | 0 | 21 | 0.86
3687 | 0 | 16 | 0.84
3843 | 0 | 17 | 0.86
4000 | 0 | 17 | 0.86
4281 | 0 | 17 | 0.84
4500 | 0 | 17 | 0.84
4687 | 0 | 18 | 0.84
4875 | 0 | 19 | 0.84
5062 | 0 | 19 | 0.84
5250 | 1 | 20 | 0.84
5468 | 0 | 21 | 0.84
5687 | 0 | 22 | 0.84
5812 | 0 | 23 | 0.84
6000 | 0 | 24 | 0.84
6187 | 1 | 21 | 0.84
6343 | 1 | 21 | 0.84
6500 | 0 | 22 | 0.84
6625 | 0 | 22 | 0.82
6593 | 0 | 22 | 0.84
6781 | 0 | 21 | 0.84

Well, I was able to virtually rid of knock, but it still feels like it falls flat on its face in the higher rpms. Is it normal for timing to fall and rise like it did without any knock? Also, check out the last three rows, notice that the rpms drop a little then keep going, I felt a little misfire right here. Am I too lean? The O2 readings also dip a bit right before the misfire. I also turned the boost up from 12psi to 16psi and am still running 3*BTDC.

 

[steel_3d]

You're running rich that's why you're misfiring and feeling like it's falling on its face. Even if you're not getting full on bucking, like that last data point, you can still have slight misfire that slows you down. I have the same thing. The o2's don't read rich, but that's cause of the constant misfires releasing unburnt oxygen into the exhaust. You can be 99.99% sure you're not lean with those knock counts.

Try removing fuel slowly. Allow for maybe 3-5 counts of knock. If you can't get anywhere, try gapping your plugs a bit tighter again. What gas are you running? I know the california 91 horsepiss is a pain.

I'm interested in what you changed to get to where you're at?

 

[dewdew]

I am also running on 91octane. I was able to get to this point be leaning out the MAF-T originally around 10%. I then turned boost up from 12psi to 16psi so ended up adding 5% back the the MAF-T. There has to be something I can do about the knock coming on at boost. I tired richening up different areas with the s-afc and maf-t, but this that last log is as good as it gets. Either way I go, richer or leaner, it has negative affects. Should I try adding a little fuel pressure, messing with timing, or anything else?