Hi Pete - a bit of duff gen from me. The swirl pot was obtained from concept racing. They supply them and arrange the pipework to individual requirements.
Do you send the return from the injection pressure relief/control valve back to the tank or the swirl pot. I do the latter which gives the priming pump a bit of a breather as it doesn't need to keep filling the swirl pot; just topping it up. The swirl pot has a 6mm connection to prevent overfilling and pressurisation. This feeds back to the tank.
Your system that permits positive oil pressure prior to ignition is a good idea. I know of some systems where the oil pressure switch energises/de-energises the power to the Injection pump relay to the same effect.
Cheers.
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