Nissan 370Z FAQ
Can I change the VTC and VVEL?
Yes the Variable Timing Control and Variable Valve Lift has been fully defined and it can be adjusted live using the RaceROM Controller. With the custom RaceROM data logging we can also see the full valve control including when the Inlet valve opens, closes, the centre line angle and the duration providing the most comprehensive understanding and control for calibration. See the RRC section in this manual for further details.
Can I stop the factory Traction Control from closing the throttle?
Yes but care must be taken, see below where the vehicle hit a bump in the road on full throttle and the ESP closed the throttle. If the TCS is disabled then the throttle will not close when there is a wheel speed differential.
The log below shows where the throttle butterfly closes as the vehicle hits a bump in the road, it also shows how the Accel pedal is fully depressed at low RPM but the throttle butterfly is only 40% open.
Can I adjust my boost pressure from the steering wheel?
Yes using Custom Maps to configure a closed loop boost control the tuner can calibrate the RaceROM Controller (via the Cruise Control switch gear) to adjust the boost pressure and even display it on the Oil Temp Gauge. You can also fit a dash mount knob (0-5v potentiometer) to adjust the amount of boost or adjust the aggression of the traction control. See the custom maps manual for further information.
Idle Learning
The 370z will occasionally need an Idle Learning sequence to be initiated, this will balance the airflow between bank #1 and bank #2 using the throttles and will produce a more stable Idle. For more information check out our https://ecutek.atlassian.net/wiki/spaces/SUPPORT/pages/7602235
Can I adjust my boost pressure from the steering wheel?
Yes using Custom Maps to configure a closed loop boost control the tuner can calibrate the RaceROM Controller (via the Cruise Control switch gear) to adjust the boost pressure and even display it on the Oil Temp Gauge. You can also fit a dash mount knob (0-5v potentiometer) to adjust the amount of boost or adjust the aggression of the traction control. See the custom maps manual for further information.
Idle Learning
The 370z will occasionally need an Idle Learning sequence to be initiated, this will balance the airflow between bank #1 and bank #2 using the throttles and will produce a more stable Idle. For more information check out our https://ecutek.atlassian.net/wiki/spaces/SUPPORT/pages/7602235
The check engine light comes on during track days
If the Oil Temp exceeds a certain temperature threshold then the check engine light will illuminate and the car enters a failsafe mode. This can be avoided by disabling the DTCs and also rescaling the 2d sensor scaling, see the tuning guide section for more info.
Gear Position N is constantly flashing on the dash
This indicates that the ECM has lost the base neutral position for the gear level and the Neutral Learning process must be carried out. See the ECM Special Tools section later in this manual for how to initiate this learning sequence.
How much power can I make from tuning
The 370z is a highly tuned engine in standard form, there are certainly variances in fuel quality around the world and some regions can gain more power than others. The standard Ignition control is serious capped for how much advance it is allowed to add, raising this limit will allow the ECU to advance the timing further and make more power but EcuTek have rewritten the Ignition Timing and the new RaceROM Ignition maps are no longer limited. In our testing on our development vehicle from just ECM tuning you can expect around plus 10bhp at high rpm, see the tuning examples at the end of this manual for tuning results.
Calculating Power Output
The maximum Mass Air Flow reading in grams can be used to calculate the theoretical engine power output (assuming a standard air Intake Tubes is still fitted). By multiply the Mass Airflow by 1.25 we can get a rough engine power output. So a peak Mass Air Flow reading of 200 grams at 7000rpm would be calculated as 250BHP.
Standard 370z develops around 260 grams Mass Air Flow at peak power, so 260 x 1.25 = 325bhp. This works on most engines but does depend on the engines design and efficiency, it can also works on naturally aspirated engines.
ECU Programming Time - FastFlash
The first time the ECM if flashed then it will take around 5 to 7 minutes, the programming speed depends on your laptop specification. The first flash will install RaceROM and needs to program the complete ECM.
Once installed then EcuTek special high speed RaceROM programming sequence (called FastFlash) is used and we can flash the ECU as fast as 30 seconds depending on which (and how many) maps have been changed.
Make sure you have plenty of battery power before commencing ECU programming.