This may be a question for another section, but I feel that it applies to burning proms. How quickly can I read the plugs after installing them? I believe I have predetination on the higher RPMs, this only happen once or twice and I didn't have the scan tool hooked up. My wife pissed me off at the mall last week so I got on it pretty hard. It sounded like a rattle under the front end, which I think is knock. I pulled a plug today and it looked fine to me, not wet, not black, it still looked fresh but I have only been through a tank since the vette heads were installed. Specs: 88 L98 Vette heads, SLP headers, 12 BDC, ARAP with no VATS and EGR. Thanks!

 

Never vent with your right foot....

Both Preignition, and detonation are close enough to be read the same way.
Either will immediately generate really tiny specs of black or silver *****. The best way to kinda guage the size of these ***** are to think of what a fly turd would look like.
Black is from carbon being blown off the chamber or piston. Silver is AL from the piston. On some border line cases a gray appearance is borderline detonation.
All three need to de dealt with immediately.
Remember a Knock Sensor is just an acoustic device, and rather meaningless in many circumstances.
Dealing with detonation, is a very time consuming part of tuning.