Just wanted to point out that the WBO2 was not neccessary to see the improvements made by changing jets.
In this case I'm glad it was captured because it reveals the jetting is starting to get out of the best relationship with the main airbleeds. But if we aimed for 12.5:1 we would have left a serious amount of power untapped. This engine made more power around 13 to 13.2
On the previous engine with the relatively unmodified 3310-3, we got best jetting based on mph at the drag strip. Some tracks had both 1/8 and 1/4 mile data on the time slip. That's always nice, esp when you're not a real consistant getting the car off the line. LOL.