Spark Plug Heat ranges, what gains have you made?

[Bruce Fulper]

Originally Posted by MoJo Risen

Enhanced tune for my vehicle is, running ignition Timing right on the edge of pre ignition.

"on the edge of pre ignition" ?? Detonation and pre ignition are two very different things. Pretty sure you meant detonation.

[MoJo Risen]

Originally Posted by Bruce Fulper

"on the edge of pre ignition" ?? Detonation and pre ignition are two very different things. Pretty sure you meant detonation.

No Bruce, it's a TURBO car, high Combustion pressure.

Turbo cars have a tendency to have low speed Pre ignition with much higher Combustion pressure....

But, I am here to gather ideas and have looked further into detonation.
I can see how they can be confused with one another.
Thank you for the response.

I do look forward to the NGK heat range 9 plug to test.