Injector return flow?

[Davidwyby]

How much do, or should the injectors flow out of the return lines?

Thanks

 

[WillWagner]

Return is only drops. They are pintle style injectors so after the line pressure drops, the pintles close, the only flow is very minimal, almost residual from inside the nozzle, not flow from the pump, to cool/lube the innards of the nozzle.