Nissan Reprogramming Launch Control

Edmunds Inside Line reports that Nissan is reprogramming the launch control on the R35 GT-R. Its good they didn't take it away. I had posted up a couple of thoughts that I had on how to "fix" the GR6 GT-R transmission. It looks like it should still work out well. There are a lot of people that are running high to mid 11's without using the launch control now. Even a few modified cars close to the 10's with out using the launch control.

- There are no hardware changes.

- Dealers will reprogram the car's ECU to alter the transmission characteristics during hard launches.

- Launch Control remains, but the maximum allowable engine speed with the VDC system switched off will be reduced from the current 4,500 rpm to between 3,000 and 3,500 rpm. The clutch engagement program will also change to reduce driveline stress, e.g., less abrupt engagement on launch.

- When launching with the VDC on, the new programming will allow for higher engine speeds and a more aggressive clutch engagement than the current setup.

- Nissan reiterated that launching the GT-R with the VDC off is not covered by the warranty.

- A revised customer disclosure form will be issued and required for GT-R sales going forward.

- All GT-Rs worldwide will receive the revised programming.

Full Text after the jump

Nissan has enhanced the Model Year (MY) 2009 GT-R by incorporating new MY 2010 programming that will optimize clutch engagement control for improved drivability. This upgrade also improves vehicle acceleration with the Vehicle Dynamic Control (VDC) ON/activated.

Nissan will provide this MY 2010 specification upgrade to MY 2009 GT-R owners at no additional cost. Nissan has already incorporated this programming into the GT-R vehicles in its U.S. inventory and will resume shipping of those vehicles to dealers. We will advise you soon on how to install this new program into all MY 2009 GT-Rs (see below).

The GT-R will continue to offer supercar characteristics of exceptional handling, maneuvering and overall driving experience. This upgrade provides the consumer improved drivability and enhanced acceleration performance with VDC ON (as required by the warranty). Standing acceleration capability with VDC ON (VDC-R mode) will improve compared to the original model year 2009 performance while such acceleration with VDC OFF will be moderated. Customers should be reminded to drive safely and obey all traffic laws. [Please note independent media reports of 0-60 drive times with VDC OFF (or what the media call "Launch Control") on closed courses with professional drivers will likely increase after this change.]

The GT-R Owner's Manual expressly warns against driving with the VDC OFF (except to free the vehicle when stuck in mud or snow) to avoid damage. Repeated acceleration launches with VDC OFF have resulted in some reported instances of damage to the transaxle. Repairs for damage caused by driving with VDC OFF are expressly excluded under the terms of the Nissan GT-R New Car Limited Warranty. Except when stuck, there is no reason to drive with VDC OFF.

This change was initially implemented with the start of MY 2010 GT-R production and has been completed for all 2009 GT-Rs still in NNA inventory... In a few weeks, you will receive the Technical Service Bulletin explaining how to implement this specification change for all remaining 2009 GT-Rs...

Source : Edmunds Inside Line

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Item Reviewed: Nissan Reprogramming Launch Control Rating: 5 Reviewed By: Sean Morris