MSefi.com read only forum (Jan.15,2018)

Hi, I'm trying to find flow rate specifications for a Rochester 5235277 injector. If anyone has or knows where I may find documentation on this GM low pressure injector could you share it with me?

They're now sold as a Delphi FJ10041. According to Delphi, they flow 56 lb/hr at 70 kPa fuel pressure.

Matt Cramer wrote:They're now sold as a Delphi FJ10041. According to Delphi, they flow 56 lb/hr at 70 kPa fuel pressure.

Thanks Matt. Could you point me to the Delphi doco that lists the flow rates. The reason is the supplier of the injector is quoting an estimated flow of 41.6lb/hr @ 13psi, and a commercial vendor is quoting 48lb/hr @ 12 PSI, and yours 56lb/hr @ 10.2 PSI. Maybe all of the figures quoted are at different duty rates? Also what would be the turn on and off times be?

Look up the Delphi part number on go.delphi.com - that is where I got my information.

Good luck trying to pry the turn-on and turn-off times out of Delphi's clutches. DIYAutoTune.com is a Delphi dealer, and they won't give that information to us, either.

Matt Cramer wrote:Look up the Delphi part number on go.delphi.com - that is where I got my information.

Good luck trying to pry the turn-on and turn-off times out of Delphi's clutches. DIYAutoTune.com is a Delphi dealer, and they won't give that information to us, either.

Thanks Matt. I'm still confused as to why the large variance in quoted flow figures. I might have a go using this method viewtopic.php?f=29&t=37841. Thanks for your input.

Ok, for others trying to find info on this injector I conducted tests using the Advanced/Output Test Mode of TunerStudio I confirmed that my injector flowed 55.2lb/hr @ 10.1PSI (70KPA).

I also worked out the opening time (dead time) of the injector. Mine measures 0.850ms before it just starts to dribble.

Hope this can help others.