Hello,

I was hoping that anyone here could help me with the OEM latency settings of OEM 20VT injectors. They are the 280 150 450.

I ask this because I have these in my Alfa 156 1.8 Novitec turbo. Novitec converted the car to a M2.10.4 ecu but now I'm converting it back to the newer and OEM M1.5.5 but want to keep the Fiat Coupe Injectors because stock is too small.
But to get it running right I need the Latency timings of this injectors.

Anyone?
Help would be very much apreciated.

I doubt you'll get a precise, definitive answer for this.

There's no mention of injector latency in the Fiat injector specifications document, suggesting that it was considered low enough not to be mentioned.

Also, the exact measurement will vary depending on fuel pressure, fuel temperature, battery voltage, alternator output, injector wear and the exact driving electronics (ECU dependent) etc. Therefore the same injector will show different latency under various testing conditions.

Generally the opening latency is around 1 to 1.5ms, with closing latency under 1ms, so you can usually assume that the injector will be partially open for around 0.5 to 1ms longer than the pulse time.

There should be a map in the ecu that compensates the latency of the injector according by (Battery) Voltage. Something like , I just made this up for an example:

7V 10V 13V 16V
2,5ms 1.5ms 1.0ms 0.7ms

Or someting like this.

Best to take them out and send them for a test, flow and latency at different fuel pressures.

there is a specific map on motronic 2.10.4 fo latency injector according with battery voltage

Do you know what adress?

yes

Do you want to share that info?

Look your pm