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COBB Tuning continues to break new ground in the Nissan GT-R R35 tuning world with the latest round of updates for the AccessPORT. Speed Density logic has been added to the AccessPORT and AccessTUNER capabilities, enabling the tuning of large turbo builds and very high horsepower applications using the stock ECU. This big news is further bolstered by additional vehicle support for the 2009 JDM VSpec GT-R and a beta release of High Power Off-The-Shelf maps that extract even more power from the engine without requiring a custom tune.

Read on to learn how the easiest and most convenient tuning solution for the Nissan GT-R R35 continues to lead the GT-R tuning industry with sophisticated tuning tools and the most sought after features and functionality!

Speed Density Tuning Support
In stock form, the R35 ECU measures airflow using a Mass Airflow (MAF) sensor located in the stock intake system. Large turbo and very high horsepower applications move so much air that they exceed the MAF sensor's maximum capacity and make MAF based tuning impractical. For these types of vehicles, COBB Tuning has implemented Speed Density tuning logic in AccessPORT firmware and AccessTUNER software, allowing these big-build GT-R's to be easily tuned using familiar tuning tools and leveraging the convenience and sophistication of the OEM ECU.

This powerful new tuning logic is available to both professional tuning shops in AccessTUNER Pro and experienced end-users in AccessTUNER Race. Since Speed Density is designed for big power builds with unique modifications, Off-The-Shelf maps are impractical and each vehicle will require custom tuning. The all new GT-R Tuning Guide clearly explains the tuning process for both MAF and Speed Density tuning for pros and experienced DIYs alike.

New Vehicle Support
The 2009 JDM VSpec GT-R is added to the growing list of supported Nissan GT-R R35 vehicles, bringing the total up to 19 unique applications spanning multiple model years, regions and hardware specifications. 2009 JDM VSpec GT-R's now get the simplicity of large power gains at the push of a button accompanied by a host of interactive features and functionality the AccessPORT provides with it's vibrant color screen and intuitive interface.

Switchable Map Throttle Control
The AccessPORT allows on-the-fly map switching through the GT-R's cruise control system, allowing the user to change maps from, say, a conservative daily-driving map to a high-boost, big-power map with just the push of a button. To take further advantage of COBB Tuning's map switching capability on the GT-R, each of the individual 9 map slots can now have unique throttle mapping to provide different throttle response for each map. This puts even more vehicle performance, response and customization at the driver's fingertips. Literally.

If you are not familiar with Map Switching on the GT-R, the following video should explain how easy it is.


HP Calibrations
Based on customer feedback, COBB Tuning has released a full set of Beta High Power (HP) Off-The-Shelf maps for Stage1 and Stage2 cars. These HP maps close the gap between our standard GT-R Off-The-Shelf maps and a full custom tune performed by a professional tuner. The Stage2 Beta HP maps, on their highest boost setting, have generated 30HP and 45TQ peak over the standard Stage2 Off-The-Shelf maps and show gains of up to 45HP at 5670RPM!



With great power comes even greater responsibility, and these maps are no exception. While these maps make more power, they do so by utilizing the stock fuel system to its absolute limit, and in some cases the demand placed on the fuel system may exceed its capacity to deliver adequate fuel to run safely.

Data logging vehicle performance is an absolute requirement when using these maps to ensure that the mechanical systems of your GT-R are up to the task of supporting these Beta HP maps. Instructions on how and what parameters to data log are explained in this GT-R Beta HP Data Logging Instructions document as well as how to evaluate performance to determine if these maps are safe to use on your GT-R.

These impressive new Beta HP Off-The-Shelf maps can be downloaded from the special Nissan GT-R HP Map Database, which reminds you of the special attention required to ensure your vehicle can take advantage of these maps while maintaining adequate safety margin.

How to Get the Latest Updates
Firmware
Please visit the Step-By-Step AccessPORT Firmware Update Instructions page to guide you through the firmware update process.​
Software
Please visit the Step-By-Step AccessTUNER Update Instructions page to guide you through the software update process.​
Maps
Please visit the Step-By-Step AccessPORT Map Download and Install Instructions page to guide you through finding maps, downloading them to your computer, transferring them to your AccessPORT and flashing a new map to your ECU.​
 

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Thanks for being so awesome Cobb! Thank you for the release!
 

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Discussion Starter · #5 ·

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May we please have an update on the 2010 LC4 launch control? Thanks.
 

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good job COBB!
 

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COBB Tuning continues to break new ground in the Nissan GT-R R35 tuning world with the latest round of updates for the AccessPORT. Speed Density logic has been added to the AccessPORT and AccessTUNER capabilities, enabling the tuning of large turbo builds and very high horsepower applications using the stock ECU. This big news is further bolstered by additional vehicle support for the 2009 JDM VSpec GT-R and a beta release of High Power Off-The-Shelf maps that extract even more power from the engine without requiring a custom tune.
Very cool, I can't wait to try this out!
 

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R35.se
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Based on the formula in the document, I am running 100.3 % injector duty cycle already, with just a midpipe and drop-ins.

I recommend whoever tries V3.6 to do a few log runs.
 

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COBB Tuning Firmware Engineer (Hacker)
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May we please have an update on the 2010 LC4 launch control? Thanks.
We are still working on it. With this release out of the way it will free us up to work on the LC4 more. We have not figured out why LC4 on the MY09 only launches at 3300 RPM, and we are still working on the LC4 gear learning and touch point adjustment.

Joe
 

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We are still working on it. With this release out of the way it will free us up to work on the LC4 more. We have not figured out why LC4 on the MY09 only launches at 3300 RPM, and we are still working on the LC4 gear learning and touch point adjustment.

Joe
It is likely a bigger concern that it launches from below 2k rpm on the US 2010 model.
 

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Joe,

It has been stated many times to use the AFR ratio new. Is this still accurate? I am still seeing people say to use the old.

Also do you have instructions on how to wire in an external wide band into Cobb?

Thanks,
Michael
 

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COBB Tuning Firmware Engineer (Hacker)
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Also do you have instructions on how to wire in an external wide band into Cobb?

Thanks,
Michael
The external wide bands don't plug into the AccessPORT, they plug into your laptop,and are logged with AccessTUNER Pro or Race software.

If you need more info on the external WBs send me an email or a PM and I'll put you in contact with one of our tuners that is more familiar with how all that is set up.

Joe
 

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I know some still use the "old" because that is what they are accustomed to, but the AFR (new) is more accurate.

The external wide bands don't plug into the AccessPORT, they plug into your laptop,and are logged with AccessTUNER Pro or Race software.

If you need more info on the external WBs send me an email or a PM and I'll put you in contact with one of our tuners that is more familiar with how all that is set up.

Joe
Thank you for clarifying.

About the external wideband.... I had a brain fart moment.... That makes sense since I have used software that works the same way....

Thank you
 
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