Lloyd E. Sponenburgh wrote:
I'm thinking all you have to do is drill out the relief oriface so that
the unloader doesn't close until a much larger airflow is felt.
Alternatively, you could try a stronger spring on the poppet.
I haven't seen an airflow-controlled unloader control on a
Quincy. Most of the larger ones have a hydraulically-activated
air valve. When oil pressure comes up, then the pressurized air
that is holding the intake valves open is released.

Jon