spark knock part throttle and getting into boost

[Davem3261]

I'm some issues with spark knock. Its happening from 1600-2000 rpm usually at 80 kpa+. Also its knocking getting into boost. I have tried removing timing at these times and it still does it randomly. Burst knock is disabled. I have the timing conservative. 13 degrees at 7 psi. I have checked to make sure the downpipe and exhaust are not rubbing or hitting anything. Any advice would be appreciated.

[Davem3261]

forgot to add. Its a 6.0 LQ4, 9.5 CR, 216/220 cam, S475, 93 pump gas

[Lakegoat]

I just pulled open one spot and at 3900rpm, 120 MAP, you are still commanding 12.45afr. I don't see a wideband? The commanded doesn't mean anything if your ve table is correct, I didn't look at the tune yet. Let me look
Cylinder volume is incorrect. You have the ifr set up like a return system but the vac table like a dead head system. VE table doecn't look anywhere close. Quit logging MAF in channels. Make your PE delay 0. Here is my PE enable gas chart. Yours is 1.18 across.

[Davem3261]

I made a few adjustments. I corrected the offset vs. volts vs. vac. I got rid of boost enrichment and added 6% fuel above 100kpa. It was going lean on transitions to boost which was probably causing some knock. Just did another log and I'm having lean transitions at part throttle. I just read thru alot of posts on transient fuel but I don't have any of those tables on my ecm.

[Lakegoat]

Why would you get rid of boost enrichment. Don't you have a blower on this car?? Boost enrichment should be 1.27 across to get a 11.5 afr based on 14.7 stoich. Your VE table is not correct. If you don't have a wideband, this is going to go boom. Under PE, Enrichment --gas, you should be at 1.24 by 1750 rpm and 1.27 by 4000 rpm. You have to have a afr error table set up in order to modify your ve table correctly. You can use short term fuel trims to modify your ve table up to 3000rpm or so if you don't have a wideband. But no WOT.

[Davem3261]

Yes I have a wideband. VE is within 1-2%. I removed Boost enrichment because of the delay, that was causing lean spikes. Last log was 11.5-11.6 in boost. If I can figure out my lean spikes from throttle transitions that should take care of the knock issues.

[Lakegoat]

Sorry, I went back and looked and I don't see the wideband. It's not showing up on my channels for some reason. I do see that at wot, that you have 7.6 degrees of knock.