Hi looking for some input on this knock. Only occurs during tip-in/downshift @WOT. I have tried pulling timing to where i believe its well into safe area. Definitely not aggressive timing. Is it anything to be concerned about? 5.3L - S472 T4 83mm, 16psi, 91 oct/100% meth. Thanks in advance.
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19-03-13 21-28-44.hpl
mytruck-turbo.Layout.xml
AFR of 11.3 and advance of 10* at 4500 I'd say false knock. My G8 would do the same thing. However, When I would go into PE a little slow it would do the same as what you see, but that was real knock.
Not sure about 11.3 afr. I ran a little leaner is all I know.
I always tune VVE....
2016 C7 M7 Z51
Callies ultra billet crank
Callies ultra billet rods
Diamond pistons
Jhonson high speed lifters
Ported and polished headwork
Custom cam
YSi-V7
Would not be concerned. I was getting 8* at 10.8 AFR with meth due to my Corsa’s and cat delete. Most of it was in the two cylinders closest to the firewall. I desensitized the sensors until it pretty much disappeared. Still get a few degrees pulled on 4th gear full throttle, but I am not concerned based on fuel going in and how the plugs look.
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