I'm trying to determine if what I'm hearing around 3000rpm is in fact engine ping or just a normal engine noise. I've heard numerous different explanations of what engine ping is, but I'm still unclear exactly what to listen for. The fact that the sound i'm hearing seems to change depending on how i accelerate, namely happening around 3000 rpm in 4th gear where I try to give it WOT makes me think its ping. Engine is:
![Image]()
All the curves above don't seem to be overly aggressive but could any recommend where I should adjust to see if I can reduce this sound at 3000 rpm. Should I just retard the advance slightly at 3000 rpm or would a more gradual advance across the curve be a better approach?
- 2l Spica
- C&B 10.9 cams (102 in/102 ex)
- BP6ES plus with .045" gap - plugs look light gray/light brown so could likely go a tad richer
- 123 Bluetooth ignition
- Currently running the following curve which I found on the bb to be a wes recommended curve for Spica:
- 500 -10
- 1000-20
- 2000-28
- 3000-34
- 4200-37
- K&N (shankle) air filters for now, as they allow for ease of adjusting the spica.
All the curves above don't seem to be overly aggressive but could any recommend where I should adjust to see if I can reduce this sound at 3000 rpm. Should I just retard the advance slightly at 3000 rpm or would a more gradual advance across the curve be a better approach?
