Sometimes I get a slight ping under wot.I was wondering if running rich could cause pinging?If not then my spark needs to come down a little.

 

Usually lean burn conditions or over-advanced timing contribute to detonation.

What is your O2 sensor showing around the time of the knock?

 

From what I've seen the 02 sensor is hardly accurate enough for that to be helpfull (unless heated)

Easiest way is to pull 3° out 500rpms before it starts all the way to the end of the knock.

See if that changes it.

Also cross reference it to your LV8 at the knock and hit it a few cells before during and the last LV8 it happens in.


Aren't you running an ARAP bin?

If so this isn't hte least bit unusual, I just made a hybrid out of mine and completely replaced the timing table with the one from the AUJN

 

I dunno about that...my dyno runs two weeks ago w/ the wide-band O2 sensor feeding data to the dyno PC showed my onboard O2 sensor wasn't too bad. 890mV recorded via the ALDL lined up with ~12.8 air:fuel on the wide band, for example.

I'm planning to pull out the ALDL data and line it up against the dyno capture, should show me how closely they follow each other. Will report after the kitchen remodel is done.

BTW the dyno and wide-band O2 graphs are on the page in my sig...and yes I saw the ugly lean condition from 2200-4000rpm and it's fixed now after some PE air:fuel table and accel enrichment table mods.