Quote:
Originally Posted by Schulisco
they're mechanical valves opening with a pretty wide pressure range from 2,5-3,6bar / 35-52psi when new as Bosch/Porsche specified in the tech spec book for the 911. Problem is: They worn out mechanically over time. A refurbishment, as we know it from the Carrera injectors, is afaik not possible. |
Correct me if I’m wrong.
The Injection systems prior CIS. They were time injection by way of the pump and timing. Pump raised pressure until the injector opens and sprays into the open valve.
The CIS injectors don’t have a valve, they are wide open. Hence “Injection System”.
Small bit to clarify. The valve in the CIS injector is to prevent dripping. So wide open when engines are running.