[Barely Legal]

The manual calls for .028-.032. mine and others have found theirs at .019-.020. This will help top end a lot.

 

[imac]

did you change yours to what the book says and then noticed more power or just saying that would probably happen? Im not sure but a larger gap is more taxing on an ignition system i think.

 

[Barely Legal]

I've been building and tuning motors in my cars for over 15 years. 'Sperience.

 

[Resq]

My plug gap was 20. Changed it to .30 Make sure you keep the seep hole cleaned with a small pipe cleaner or wire. It keeps the mud/dirt/water from staying around the plug!!