[Lorenfb]

"Placing a high ohm injector on a PH system may function but does it function at its best."

- dfink -

It should function properly, i.e. given that the flow rates are the same at the
same system pressures.

"Does anyone have dyno AF information that this situation if effective and what does it do to the stock ECU that is not designed for that type of injector. "

- dfink -

There would be no real issues with the older DME ECM (3.2), as the DME
would never reach the current limit and begin switching on/off to protect
the output driver because of its max curent limitation of 10-12 amps.
Low impedence injectors usually have resistance values of 1-3 ohms
which results in peak currents exceeding the max of the output device.

"There is a reason Porsche used the PH injectors. They are designed for high performance engines."

- dfink -

Not really, at the design time (late '70s) Bosch engineers thought this type
of injector was the best at the time for an EFI system whether L-Jetronic
or Motronic. This injector/ECM design was used on VW/BMW/Porsche until
the late '80s. Starting with the 964, a simple output stage was used in the
DME utilizing high impedence injectors. This was also the case for BMW
('87 635/735).