Tom-Guy

Wow, plugs clean enough to read well.

Those are 7's? :/ The heat mark on the ground strap is not centered on the 90 bend (indicating ideal plug temp). The first thread or two of the shell is slightly heat discolored. Close the gap a little bit, a flat .030" should be good. Draw out a little more timing and see how the heat mark on the ground strap manifests on fresh plugs - you may not be in all-out audible detonation, but the cyl temps/pressures are spiking causing both high freq detonation and borderline overheating of the plug.

Clean porcelain is a good thing. Ignorant amounts of soot in the well let's you know you are safe, not that you are tuned correctly - should be darkened but not powder-sooty. Use individual cyl trim to dial in a little more fuel to the #1 plug - start out at 1.016 based on what I'm seeing and go from there. As you turn the boost up, you will find that thermal dispersion across the engine and dynamic fuel flow will change a little bit and you will have to add more fuel into cyls #2 and #3, which run hottest.

hatch96

timming on a p06 engine is 16 degrees before top dead center. the y7 is 12 degrees BTDC. I've never used chrome, but i was having problems tunning my y7 w/ uberdata because of the difference. try highlighting the entire timing map and retard it until your base idle value goes from 16.75 to around 12.5.

Mark

bambbrose

can anybody verify this?

thanks for your input everyone. I'll size that gap down a bit. I redid a basemap and fuel tuning again. Its running a lot stronger on top but still slightly breaking up when the boost hits in