Need help with logs....Knock?

[TalonFiero]

Need help with diagnosing my logs. I had decent timing with just the GM MAF and MAFT. Now after I added my SAFC I seem to pick up knock around 6000+. Both logs are 2nd and 3rd gear pulls on 93 octane.

My setup: 20g eliminator(tdo5h), 550cc, VR4 pump, 3" strait thru exhaust, Injen intake with Blitz air filter, Blitz BOV on DB UICP, JoeP MBC, MAFT 3" and SAFC. I am still running the stock SMIC.

17 PSI

RPM O2 Timing
3592 .97 10
3956 1.00 10
4428 1.00 10
4836 1.00 13
5288 1.00 14
5720 .97 17
6160 .97 19
6552 .97 15
6928 .97 15
6516 .39 35
4896 .93 14
4928 .97 11
5096 .97 13
5296 .97 14
5476 .97 13
5644 .97 14
5844 .95 14
5988 .97 14
6160 .95 14
6324 .95 14
6484 .95 13
6640 .95 11
6796 .95 11


14.5 PSI creeps to 16 PSI

RPM O2 Timing
3972 .97 12
4408 1.00 13
4828 .97 15
5280 .97 18
5704 .97 19
6124 .97 20
6516 .97 20
6892 .97 18
7256 1.00 27
6232 .32 25
5000 .97 13
5120 .97 14
5308 .97 16
5476 .97 17
5660 .97 17
5824 .97 18
5988 .97 18
6152 .95 16
6324 .95 16
6472 .95 15
6620 .95 15
6784 .95 13
6916 .95 14
7044 .95 14
7164 .93 13

Thanks for any suggestions!

Jim

 

[jsigone]

what kinda timing u getting? Seem to be running a lil rich. I'd go down -2% on the across the board. See how hte timing and knocks look, if it gets better, go another -2% and go from there.

 

[Mike 99GSX]

Originally posted by jsigone
what kinda timing u getting? Seem to be running a lil rich. I'd go down -2% on the across the board. See how hte timing and knocks look, if it gets better, go another -2% and go from there.

It says what timing he's getting. He also can't see knock. The 02s mean little on a 2g. My guess is that you're running out of injector with the 20g. Notice how the timing is improved when you turned the boost down? Do you have an AFPR? If you do, you can bump up your base fuel pressure to make the 550s act a little bigger and you'll probably get some advance back. I would also try adding more fuel up top. I'm now tuned with a wideband at 22PSI with my 50 trim. FWIW my O2 reading range from .98-1.00v on the pocketlogger even though I'm tuned to a 12.5-1 A/F ratio on the wideband so don't put alot of faith in the O2s. You probaly know this too but a FMIC would do you good. You could be getting some timing pull from too high of intake temps.

 

[TalonFiero]

Thanks for the suggestions! I didn't post all of my logs as they all seem to have a common theme. I can tune for good timing until about ~6500, then it goes to shit! My SAFC is negative across the board until ~6500, no matter what I do it doesn't seem like I can add enough fuel to change the O2 reading around ~6500+.

I have a FMIC that I am adding this week. I am also going to add an AFPR and fuel pressure gauge to see whats going on.