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Latency of Coupe 20VT OEM injectors #1623470
31/07/2018 10:40
31/07/2018 10:40

H
HetLicht
Unregistered
HetLicht
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H



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.

Re: Latency of Coupe 20VT OEM injectors [Re: ] #1623474
31/07/2018 15:47
31/07/2018 15:47

G
GrahamL
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GrahamL
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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.

Re: Latency of Coupe 20VT OEM injectors [Re: ] #1623475
31/07/2018 15:54
31/07/2018 15:54

H
HetLicht
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HetLicht
Unregistered
H



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.

Last edited by HetLicht; 31/07/2018 15:54.
Re: Latency of Coupe 20VT OEM injectors [Re: ] #1623912
13/08/2018 08:44
13/08/2018 08:44
Joined: Aug 2006
Posts: 1,904
Poland
deannn_20VT Offline
My life on the forum
deannn_20VT  Offline
My life on the forum

Joined: Aug 2006
Posts: 1,904
Poland
Best to take them out and send them for a test, flow and latency at different fuel pressures.

Re: Latency of Coupe 20VT OEM injectors [Re: ] #1625220
22/09/2018 08:30
22/09/2018 08:30
Joined: Oct 2008
Posts: 14
France
pasto Offline
Newbie
pasto  Offline
Newbie

Joined: Oct 2008
Posts: 14
France
there is a specific map on motronic 2.10.4 fo latency injector according with battery voltage


20vt
Re: Latency of Coupe 20VT OEM injectors [Re: ] #1625252
22/09/2018 20:43
22/09/2018 20:43

H
HetLicht
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HetLicht
Unregistered
H



Do you know what adress?

Re: Latency of Coupe 20VT OEM injectors [Re: ] #1625296
23/09/2018 18:41
23/09/2018 18:41
Joined: Oct 2008
Posts: 14
France
pasto Offline
Newbie
pasto  Offline
Newbie

Joined: Oct 2008
Posts: 14
France
yes


20vt
Re: Latency of Coupe 20VT OEM injectors [Re: ] #1625297
23/09/2018 18:51
23/09/2018 18:51

H
HetLicht
Unregistered
HetLicht
Unregistered
H



Do you want to share that info?

Re: Latency of Coupe 20VT OEM injectors [Re: ] #1625317
24/09/2018 10:32
24/09/2018 10:32
Joined: Oct 2008
Posts: 14
France
pasto Offline
Newbie
pasto  Offline
Newbie

Joined: Oct 2008
Posts: 14
France
Look your pm


20vt

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