A couple of data points worth noting before deciding if the Drill-baby-Drill option is for you.
The frequency valve in open loop runs at 50% duty cycle, and doesn't deviate much from that when warm and in lambda control mode.
On the 964 Turbo the frequency valve is driven at 75% for 0.5 seconds to provide acceleration enrichment
For a properly running engine, modified or not, the Lambda Delete heads
must be set at a point somewhere below the maximum flow possible if the frequency valve was still controlling things.
Flow and sharp edges do not play well together so inspect the existing restriction paths and consider shape and surface finish before allowing Harrison Ford near your fuel head.