It's possible however the head needs to be machined to accept the N55 injector. IIRC it was Motiv/Overrev Fab that did it years ago, using a Motec M142 to control it. Can't remember if they also switched the HPFP as well.
Nexsys port injection for N54 getting closer
- Thread starter pbondar
- Start date
It's possible however the head needs to be machined to accept the N55 injector. IIRC it was Motiv/Overrev Fab that did it years ago, using a Motec M142 to control it. Can't remember if they also switched the HPFP as well.
When an injector sticks open, what causes the fuel to flow from the tank to the cylinder? is it pressure in the tank or pressure in the fuel feed line?
This is absolutely correct, DI allows very precise injection of fuel when it’s required, which allows the use of high compression ratios with turbo charging . In PI the fuel is injected way before TDC which allows it time to hang out in the cylinder and cause deterioration because as is known fuel has to be present for pre ignition to occur, be sure your tuner is very capable as PI and high compression ratios will result in very high levels of deterioration.
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Yeah. While tuning 6 port injectors is theoretically easier than tuning a combination of 6 port injectors and 6 direct injectors, I think tuning will be more critical than ever. Anyone planning to rock this kit should plan to be extra careful with who they choose to tune their car, especially in the early days of this di delete solution.
I'll stay di only until the dust settles on this one.
Pressure in the line. The LPFP will keep the rail at 72.5 psi while the ignition is on, so if an injector is stuck open it will just let fuel pour in.
Doing some design work for the next generation of our JB4 port injection controller and features that might interest the N54 crowd. That has led me to start pondering what it would take to to support DI deletion while retaining general DME control over the engine. To my surprise it looks like someone is already doing it lol.
I assume this kit attaches to the DI injectors and translates the DI signal per injector to support high impedance port injectors? That combined with a few flash changes to the fuel injection window for example seems really smart.
I assume the misfire detection / specific cylinder fuel shut down would operate properly in this configuration as well, as would the factory wide-band o2 sensor system and fuel trim system.
Really cool to see this platform chugging ahead! Like everyone else I'm also shocked at the high cost of replacement DI injectors these days.
I assume this kit attaches to the DI injectors and translates the DI signal per injector to support high impedance port injectors? That combined with a few flash changes to the fuel injection window for example seems really smart.
I assume the misfire detection / specific cylinder fuel shut down would operate properly in this configuration as well, as would the factory wide-band o2 sensor system and fuel trim system.
Really cool to see this platform chugging ahead! Like everyone else I'm also shocked at the high cost of replacement DI injectors these days.
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The tuning strategy will be *very* different. Way richer AFRs for starters and preignition risk increases. But anyone doing this is running straight E85 anyway I assume. That mitigates the risk to a degree. I wonder what impacts it has on MBT? More Timing? Less Timing? It's been maybe 25 years since I tuned a pure port injection car lol.
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