[ssnscruzeeco2015]

The world of sparkplugs is as varied as the people using them.... There are what is considered generally accepted best practices. as indicated above.

one thing to think about, perceived spark blowout and misfires could very well be the ECU responding to knock detection and it's movement the spark timing, which at times can be a significant loss of power with a slow return to normal.

 

[ssnscruzeeco2015]

These are the times where I wish I had the genius to be able to parse and compile data via automatic software. I have 8000 Km's of data logging running on Denso TT IR's gapped at .045".

I know that I get misfires, knock retards, and I expect them and have recorded them, but I am able WOT to 5000 RPM (very rare that I do, or go past) I currently feel the most power loss during knock retards. Pulling up a 8% hill @ 100 Kph @ 1900 RPM is also WOT just without the acceleration of speed part. sometimes I feel and see misfires, knock retards but not always.

I seems what you are describing is what I felt in my OLDS Achieva quad4 when I hit the rev limiter in third gear years ago.

For the most part I am stock, except for the plugs..... which may or may not be the same as the other guys, but adds a few more what if's.