Holley 750 "stumbles" on WOT

Testing with different secondary springs on 3310s has produced a similar WOT bog on some engines with good signal to the carb for me. You “can” make them open too early and the primary accelerator pump can never cover that big of a lean spike so tuning becomes an issue. Start with a stock colored spring in the dash pot and disconnect the secondary linkage when first tuning. Get the primary side functioning perfectly then bring in the secondary tuning.