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ECMlink Can't run high boost, massive knock

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moi1463

10+ Year Contributor
89
0
Aug 9, 2008
Jax, Florida
I've been tunning for 15psi and then for 21psi. I'm pretty sure I tuned for the 15psi pretty well, keeping the same settings to run high boost. I get massive knock starting at around 3800 rpm. So I went and pulled the timing, seemed to be better but still getting 2.5 degrees of knock with only 6 degrees of timing or less. I'm not sure how people are running high boosts at 16-18 degrees of timing. Should I just continue to pull timing until it goes away completely? And also, with the second high boost log, past 5100 rpm, it started to buckle and stutter, and I noticed the af ratio got pretty lean, not sure what the issue is since all I changed is up the boost.
 

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From the first and last log, it looked simple.

You went from slightly rich to fairly lean on WOT runs. Your 10:8 turned into 12:1 between upping the boost.

Just go into your fuel slidders on WOT fuel page, and up the ammount where needed.
 
did this pan out?

i can run 15psi and have 14deg but seems like if i go to 18-20 i have to take timing out to like 9deg! really stupid. AFR/s are like 11.1----10.8 up top and knock starts creeping up when we add boost!
 
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