Thread: Running GTiR with B13 ECU

The fact that they have external resistors I wouldn't think that they are or even could be native peak and hold drivers... But Calum knows alot more than anybody on the ins and outs of the ecus.

I would highly doubt the GTiR ECU has peak and hold injector drivers in the ECU.. if they have a resistor box external of the ECU, then they definitely do not!

Ive used a GTIR ecu to drive normal high impedance side feed injectors with no resistors no problem, seems to work as normal.

hmm whats the point of running a low imp injector with a resistor to make it like running a high imp injector when all other sr's run high imp injectors????

They probably saved 10 cents by using low impedence with resistor box.

Because the stock ECU injector drivers can only handle so much current, by adding the resistor box in there it lowers the effective current to something the hardware inside the ECU can handle.

exactly, so why not use high impedance injectors like all the ohter nissans of that era?

Is there an advantage to running a low impedance injector with resistors? Does it open faster, last longer, flow better, finer control over PW??

10 cents in Nissan pocket

Ok well that's unfortunate. Hard to believe as well seeing as all of the other models of nissan during that time period used hi imp injectors, and then they use low imp on their rally homologation model.

if it was cheaper why not do it with all the sr's? I'm not trying to drag this out on purpose, i really just want to make sure that there really is no rhyme or reason to the decision so i can be at peace with swapping out the ECU which should be the same in every which way to a b13 ecu, other than the titania exhaust sensor, which they used because it responds faster than the fat zirconium style.

oh and the stock boost control solenoid, which must be handled by the ecu.

I asked Vadim to move this injector discussion to a new thread. Thanks Vadim!

Based on the research I've done on this subject, I believe that both GTiR ECUs and B13 ECUs have saturated injector drivers, and the GTiR uses low impedance injectors with resistors, to be compatible. You can run low impedance injectors with either peak-and-hold drivers, or with saturated drivers with a resistor. You cannot run high impedance injectors with a peak-and-hold driver. Anyone with knowledge to the contrary, please chime in.

As for the stock boost control solenoid, it is on pin 111 in the GTiR ECU harness, which corresponds to the O2 sensor heater output on the B13 ECU. A B13 ECU running TunerCode for the GTiR will be plug-n-play with the GTiR harness, plus, with the B13 ECU, you will have 3 additional programmable outputs over the GTiR ECU.

Dave