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R35 Tuning Development 2010

Martin Donnon

By Martin Donnon,
in R35 GTR

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Martin Donnon Mentor

Martin Donnon

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As some of you may know we are in the fortunate position of being an Alpha/Beta development partner on the AccessTuner R35 GTR tuning program. There have been some amazing advances in the software over the past 12 months with some serious improvements to the actual base code of the Nissan management system being written in to allow big gains in both refinement and power production :P

geartpsbeta.jpg

So far there have been some amazing updates to the tuning of these cars which simply didnt exist before -

- Proper data logging and measurement of engine Knock

- Rewriting of the GTR boost control system to use RPM vs Wastegate Duty Cycle

- Redesigning the internal load calculation to run big 1000cc injectors without upsetting TCM torque signals

- and this latest effort, boost correction with both gear and throttle position

Specifically engineered into the code at the request of some of the track guys this new parameter in the GTR system allows much better chassis balance mid corner, where previously there would be 15psi of boost at part throttle and at three quarter throttle, now the boost and the attitude of the car can be regulated with the pedal position allowing much better transition of grip to slip. We have tested this on the dyno so far and look forward to testing on the track next week when time and weather permits. These features will be available to all Cobb Accesstuners once Alpha and Beta testing has been completed :D

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BARCODE Contributor

BARCODE

Posted
Posted
As some of you may know we are in the fortunate position of being an Alpha/Beta development partner on the AccessTuner R35 GTR tuning program. There have been some amazing advances in the software over the past 12 months with some serious improvements to the actual base code of the Nissan management system being written in to allow big gains in both refinement and power production :P

geartpsbeta.jpg

So far there have been some amazing updates to the tuning of these cars which simply didnt exist before -

- Proper data logging and measurement of engine Knock

- Rewriting of the GTR boost control system to use RPM vs Wastegate Duty Cycle

- Redesigning the internal load calculation to run big 1000cc injectors without upsetting TCM torque signals

- and this latest effort, boost correction with both gear and throttle position

Specifically engineered into the code at the request of some of the track guys this new parameter in the GTR system allows much better chassis balance mid corner, where previously there would be 15psi of boost at part throttle and at three quarter throttle, now the boost and the attitude of the car can be regulated with the pedal position allowing much better transition of grip to slip. We have tested this on the dyno so far and look forward to testing on the track next week when time and weather permits. These features will be available to all Cobb Accesstuners once Alpha and Beta testing has been completed :D

Exiting stuff Martin.I feel we are all pretty lucky to have Willall just over the border.Now off topic but after reading all the NAGTROC posts relating to gear box issues with the circlips and seals and the damage their fallure causes do you recomend having these parts changed out asap and are you abel to give a ball park cost if the car was sent to you.From what I read there is a feeling amongst US owners that it should almost be a Nissan recall repair.Would appreciate you thoughts Martin.

Martin Donnon Mentor

Martin Donnon

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This is not about Willall - it about the Cobb AP product which many Australian companies sell and some can even tune. We can just bring the news earlier since we are on the development team. For 35 owners information is power :P

If you want my advice on the transmission design issues then start a new thread on the subject and we will go from there.

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