sdurg24

My 2011 GS with M6, F55, and NPP (with Mild to Wild remote) has been a terrific car for me and the best of the 3 Corvettes i have owned but......the Launch Control feature has never worked for me. Finally a dedicated tech (Tom) from McMulkin Chevy in Nashua, NH has solved the problem. This may have implications for other similarly equipped 2011 and 2012 Vettes. Seems the Mild to Wild control interferes with the communication with the Launch Control when in the "loud" mode. In my GS the default mode of the Mild to Wild switch is in the loud mode whenever I start the car. In order to get to the quiet mode I have to press the remote. This is just fine with me as I love the sound and can make it quiet whenever I want. Little did I know that by using the Mild to Wild in the loud mode I was over riding the ability of the Launch Control to be set in motion since it can only work in the factory default quiet mode (which automatically goes to loud mode after about 3,700 RPM). Who woulda thunked it? Seemed to me that the loud mode made more sense for rapid accelleration but in acuality the RPM's rise over the 3,700 level when Launch Control is used. I haven't had the opportunity to test it out as I just beat the latest snowstorm back to the garage where my GS will spend most of the upcomming NH winter but I recently came back from Bob Bondurant School where I had the opportunity to try out the Launch Control several times on a new ZR1. Can't say enough about the ZR1, Bondurant, and especially Tom the Tech from McMulkin.

Torchsport

Thanks for that info.

I too got to enjoy using launch control on a Bondurant ZR1.
I have learned that Spring Mountain wont allow this.
Bondurant ENCOURAGED us!

dgrant3830

Very interesting and will remember this for others who run into a similar problem.

dvilin

Interesting info, but are you saying this is what the Tech told you but you have not tried it and do not know if this is the answer or not. Or am I missing something?

sdurg24

Sort of on both counts. Previously I knew the Launch Control was not working because I put the vehicle into Launch Control mode by getting on level land, putting the steering wheel straight ahead, hitting the Traction Control button twice putting it into Cometitive Driving Mode, Making sure the MSRC was in Sport Mode, Put the clutch all the way to the floor, shift into 1st gear, Put gas pedal all the way to the floor. If the Launch control is engaged the RPM's go to about 5,000 then level off to about 4,200 and stay there until you pop the clutch. If Launch Control is not engaged the RPM's do not level off and you have to quickly let off the gas pedal to prevent over revving. Now the RPM's do level off so that indicates Launch Control is engaged. What I haven't been able to do is pop the clutch and really "launch" due to cold and wet weather. Good question though.

Shysterman69

Thank you so much for posting this, I had taken my car to the track (Bristol Dragway) in July and thought I was doing something wrong with launch control because I could not get it to work. Now that all makes sense. I will remember to set my mild to wild back to closed before attempting.

dvilin

Got it, thanks for the reply that helps. Have a Happy Thanksgiving.

bass mechanic

interesting i have a MtW controller installed and although i have not actually launched the car i have seen the rpm's go up to about 4 k with the MTW in the loud mode.
but i will keep it in mind should i have any issues in the future.
mine is a 2012 centennial edition. the only difference may be that i have PTM feature verses just the mag ride.

Supersonic 427

Great info.....I have yet to try out the launch control on my 3 week old GS MN6 NPP Coupe. I also have the mild2wild remote and leave it on the loud side. So now knowing this I will put the m2w in quiet mode when I do try the launch control.

So, for those who don't have the mild 2 wild remote and removed the fuse for the NPP to have it loud.... will they too have the launch problem?

BevoZ06

OP,

Thank you for this. I have been waiting for my new GS to be broken in so I can try the launch control. Do you have any concerns about the GS clutch or transmission being able to handle the shock of the launch? I would like to think GM would not have made the feature available if it were not reliable, but I have been hesitant.

Thanks again for the info.

sdurg24

From what I know I would say yes. Tom the tech had originally thought that was exactly what happened, that the fuse had been removed thus altering the factory set default. It will be interesting to see what some members say who have disabled the Dual Mode Exhaust.

Gearhead Jim

Some people have stated that all C6 models have a soft rev limiter that won't let you go above about 4,000 RPM while sitting still. If true, I still don't know if it is triggered by being in Neutral/Park (Automatic), or Neutral/Clutch In (Manual), or simply no forward speed.

Snake.Oiler

I doubt it . My DIY switch doesn't interfere with launch control

sdurg24

Keep in mind that I haven't actually popped the clutch with the Launch Control but I have several times without it and the clutch and tranny held up just fine. I know the ZR1 has a more robust system but I used the Launch Control in the Bondurant course and it was smooth as silk over and over and over again. Didn't do the tires any good but as they say at Bondurant, "drive it like you stole it and learn from it!" IMHO the Launch control is designed to launch your car in the most efficient manner possible so I think it will be just fine. Be prepared and hold on tight with both hands, however the ride is smooth and straight in the ZR1!!!!!! Sorry to be so late responding. Turkey did me in, LOL. Good luck with the new GS!

Turbo6TA

My dad had old old 94 Buick Lesabre with a V6 automatic. That car had launch control too.

It was like a "stutter box" rev limiter. You could put it in either Park or Neutral and floor it ... it would just set there at 4,000 rpm and "stutter"

Joe_G

They don't.

The best launches result from 6500 rpm, keeping the rpms above 4500 during the entire launch process.

The launch control is useless at the drag strip. 2.3 60 foots in my limited observations.

OP good post. I'll mention this to Ed the purveyor.

terryharrison

It starts in the loud mode even if it's in the quiet mode when you shut it down? Mine does not work this way. If I shut my car down in the quiet mode then it's still in the quiet mode when I start the car again. It stays in whatever position it was in when the car is switched off.
But mine is a Z06, so maybe it's different from the GS?

rayk

I'll have to try this tonight. I didn't think my LC worked last time and thought I had done something wrong. I did have the MTW in loud mode.

Stevenyc777

Let me get this straight .you have to keep the m to w switch in the quite mode for the l.c. to work??

mjcourt

In my GS I kept the M2W loud all the time. Seems like launch control worked sometimes and not others. My best time at the dragstrip was a run using LC. But other times, the car over-reved, tires spun, and the power was killed by hitting the rev limiter while only doing 15 mph-ish. I quit using LC because I didn't like it's unpredictable behavior. I never tried it in "quiet" mode, hopefully that helps.
Also, I went to Bondurant last June and they never had us use LC. I wish they had. School was great though.