Question on timing advance

[gregbar]

Found my graphs. 12.5 degrees 42.5 fuel press 12.9 - 12.2 AFR 278HP. lowered fuel press to leanout AFR. 12.5 degrees 41 fuel press 13.6 - 12.9AFR 287HP. Bumped timing to 14 degrees. 14 degrees 41 fuel press 13.6 - 13 AFR 285HP. As you can see I started losing power between 12.5 and 14 degrees of timing.

 

[gnx547]

You can absolutely advance the timing, just remove the spout. 17 degrees seems a little crazy, I'd suggest 12-14 tops.

What should timing be set at with a supercharger?

 

[five0joe]

Found my graphs. 12.5 degrees 42.5 fuel press 12.9 - 12.2 AFR 278HP. lowered fuel press to leanout AFR. 12.5 degrees 41 fuel press 13.6 - 12.9AFR 287HP. Bumped timing to 14 degrees. 14 degrees 41 fuel press 13.6 - 13 AFR 285HP. As you can see I started losing power between 12.5 and 14 degrees of timing.

That tells the story for sure. Thanks man, Joe