Maxima Technos ECU FLASH

Maxima TECHNOS ECU Information

The Maxima has always been a popular, comfortable, sporty family sedan. The only thing it needed was bit more power. More power was definitely on our mind, along with safety, when we developed this ECU upgrade. After reviewing the data tables and comparing it to the 350Z and G35, we came up with the best optimal fuel and timing curve to unleash the hidden power from your Maxima.

How much is it? - Pricing Information
Need another ECU for spare? - ECU Duplication
Need custom tuning for special mods? - Custom Tune ECU
How to do I reset my ECU? - ECU Resetting Procedures
How do I remove the ECU ?-
Got Questions? - FAQ

FEATURES:

REV limiter modification
We found that with the ECU upgrade, more power can be gained with a higher rev limiter. A 7100 RPM (stock 6600 RPM) rev limit is set to take advantage of top end horsepower, while still providing a safe protection for the motor.

Speed Limiter Removal
The stock speed limiter of 236 km/h (148 mph) has been removed.

Ignition Timing Map Adjusted
There wasn’t much room for improvement at the bottom end since the ECU retards a lot of timing by using a feed back system in stock trim. So, we have added more timing at the mid range - high end to take additional advantage of higher-octane gasoline. This aids in improving torque from 3000 rpm and up.

Fuel Map Adjusted
Stock fuel was set to detune the top end horsepower. We discovered that the car runs extremely rich after 5000 rpm. Air to Fuel ratio (A/F) of 10.5 was found right before the stock rev limiter kicks in. Cleary, Nissan was trying to detune the power output at higher rpm to discourage the driver from hitting the rev limiter. For the performance enthusiasts, however, this is unsatisfactory, so we set the A/F to 12.5 all the way to redline to provide adequate power gain while still maintaining a safe margin.

Drive By Wire Adjustment
Throught our testing we found, the drive by wire system was program to never fully open (throttle flap) when you smash the accelerator pedal. In fact, it actually closes the closer you get to the rev limiter, by as much as 20%. This restricts air into the motor and causes HP and Torque numbers to go down. We have remapped this setup so when you go wide open throttle, the throttle flap fully opens and STAYS OPEN, increasing HP and Torque.

Adding to above modifications, a few other adjustments were made to other maps to enhance the feedback function which improves power, torque and drivability. The resulting achievement is a remarkable improvement in driving feel, which is more than what numbers alone can tell you. We are very satisfied with the results and are proud to release our TECHNOS ECU for this tuning-challenged ECU.

(Fig.Bosch Dyno Result)
~20 HP Gain at the Crank with only HKS muffler install (everything else stock)

(Fig. DynoJet)
224.2 WHP (peak) 237.3 Torque (peak) with an Injen Intake, Modify exhaust, and Technosquare ECU Upgrade

Changed air intake system
One of the major problems on this car was a feedback system that compensates for modifications. The oxygen sensors detects fuel mixture and will tell the ECU to richen up or lean out the mixture. This correction factor was way too wide, so some performance components upgrades (intake, exhaust) would actually result in a loss of HP below stock!
We adjusted the correction factor to reduce that compensation reaction. Our tests showed consistent power and torque improvement following installation of an intake system.

More testing results coming soon!

ECU DUPLICATION SERVICE
If you are tuner or performance enthusiast with a need to have a spare ECU for tuning work or to avoid warranty complications, we can help you. We can duplicate your ECU stock data and immobilizer information to another ECU (brand new or even one from junkyard). Call us for more details!

CUSTOM TUNING SERVICE
If you are tuning shop, performance product manufacturer, or a hardcore enthusiast, we can develop a custom program to suit your individual needs. Consultation on development and prototyping of custom parts are also available. Call us for more details!