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New Cobb Tuning Maps

Martin Donnon

By Martin Donnon,
in R35 GTR

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Martin Donnon Mentor

Martin Donnon

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Today we will be datalogging and publicly reporting on the new Cobb Tuning upgrades to the GTR which we have been providing input for over the past month. The brainchild of John in the UK and Joe from Cobb, the new mapping system does away with Air Flow Load inferred Wastegate Duty Cycle, and converts the R35 Boost Control system over to an RPM vs Duty Cycle output curve. What this means -

Stable boost control without the big boost spikes on 'flat foot' gearshifts that haunt most GTR tunes (no good for engine or transmission)

The ability to hold more consistent and greater boost pressure in the top end of the rev range.

No need to change over wastegate actuators on the GTR to higher rated versions

No need to add aftermarket boost controllers etc.

An exhaust equipped GTR using this mapping with stock actuators and boost control hardware just went 10.8 at Santa Pod a few hours back :P

We will be performing some mapping and datalogging using our new Mainline AWD dyno to provide the most consistent and repeatable data that we can give back to both Cobb and present to the public before the software is released. Exciting times ahead for GTR owners, and obviously we are happy to be part of the professional testing and development team for Cobb ;)

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LSX-438 Mentor

LSX-438

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This is interesting.

At a recent practice day (Oran Park) running an AP tune, i found my lap times actually went slightly backwards. Personally, i think it was due to the power coming on too strong, too quickly, turning the tyres and invoking power sapping traction control. I guess the solution is to drive with TC off, and anticipate wheelspin more delicately, however something that guarantees a better/smoother and more progressive application of power may just turn that situation around for me.

Edited by LSX-438
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Martin Donnon Mentor

Martin Donnon

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Linear power that doesnt upset the balance of the chassis has always been the key.

I have never been one much for a big midrange rush than a curve that falls flat on its face. Great for the odd squirt between the lights (if anyone actually does that kind of thing anymore) but no good for a genuine motorsport application :O

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