How much timing on a racing gen 3

RockinRobin said
6.55 @105mph D.A. was 3300. We'll see how it does when the weather is cooler.

Also it has straight 30 weight break in oil in it right now. changing to 10w40 this week. Don't know if that will make a difference.

Nice can you tell us how the runs differed between the different timing numbers? Like how sensitive was the engine to timing adjustment.