G35 Technos ECU

G35 TECHNOS ECU Introduction

The long awaited ECU has finally become available. Introducing G35 TECHNOS ECU upgrade. After hundreds of hours of R&D and numerous Dyno pulls, we have successfully developed this ECU, as part of a performance upgrade.

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 ?- G35 ECU Removal Instructions
Got Questions? - FAQ

FEATURES:

REV limiter modification
A 7100 RPM (stock 6600 RPM) rev limit is set to take advantage of top end horsepower.
The stock rev limit was set way too low. Some of you may be having the problem of hitting the fuel cut at hard acceleration. We found this very annoying as we increased power at the higher rpm range. Hitting the rev limiter too often, could actually damage the engine since it is achieved by cutting fuel. By adding an extra 500 rpm, we can avoid hitting the rev limiter while protecting the motor.

Speed Limiter Removal
The speed limiter is removed. The stock limiter was set at 250Km/h (156 MPH), so for all practical purposes, we could have left it alone. But we decided to remove it, just in case someone feels the need to go beyond that.

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 higher 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, blowing the lid off what was thought to be an automobile already running pretty near its maximum capability.

Testing was done on a stock G35 6Spd

(Fig.Bosch Dyno Result)
Black line shows stock vs Blue Line with 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.
We will be conducting additional testing on various intake and exhaust systems for the compatibility of our ECU. Although we anticipate a dramatic improvement per component upgrades, some may require custom tuning to take full advantage of their performance.

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!