Did the QF rep provide any more color to the statement about starting the main circuit between 2K and 3K? I'm still learning the fine points of carb tuning as well, but I don't believe the IABs will have an effect on the main circuit start.
On my car, it appears that due to limited throttle opening, the transition circuit continues to deliver a good bit of fuel, even up in the 3K range (highway cruise), where the mains are starting. The combined fuel leads to a pretty rich mixture. I have been debating on whether I should try and slow down the main activation.
