David Floyd

Opinions on the new High Z technology ? Reason I ask , one of my 95lb Delphi injectors is locking up, so i am in the market

DLS

I´m also wondering.
I´ve heard lots of positive about the new bosch motorsport 1000-1700cc injectors.
(who people sell under their own brand i think?)
For example FIC and injector dynamics
The 944 uses peak and hold injectors as i understand and this is saturated.
But rogue tuning offers 80lbs high Z saturated injectors to his maf.
is it possible to run saturated on original dme?

Rogue_Ant

The 944/951 DME injection driver is... interesting.
Yes, high-Z injectors can be run with the DME - with correct software changes.

Generally you can use high-Z injectors with peak & hold drivers, but not the other-way-around.

Tom M'Guinn

Interesting indeed....

Adker

The waveform above looks right but the DC levels are not. Using your piggy back and fuel pressure, you should be able to dial them in.

DLS

Ok so you need to make some software changes to run the bosch high z injectors ?

I can´t just toss out my resistors and lucas 1200cc and put in the bosch injectors

David Floyd

Installed the FIC injectors today and I was able to do just that

Since your already running 1200cc injectors I think you have already made most of the software changes needed ?? I pulled resistors and dialed in fuel ratio by piggyback, doing an autocross tomorrow, we will see how it goes.

DLS

I don´t think i can just swap them
even if they are at the same 1200cc flow

I think i also need to have some changes to the software because the old injectors are peak and hold and the new is saturated?

Rogue_Ant

As a generality, saturated injectors are slower to respond than peak&hold.
This is why I mentioned a software change earlier. You will need to update the injector latency settings for the slower injectors, and need to be running in a 1 inj/720° batch-fire mode).
You can possibly tune around it with a piggyback - as long as the latter is true.