I thought this comparison test of two new sports cars....one with a 7 speed dual clutch and one with a torque convertor automatic...

We should have heard the dual clutch was superior on the track in shifting etc but didn't. I thought this might give insight to gms new PCM transmission performance and tune..

http://www.roadandtrack.com/car-revi...s-65-1-roa0813

Or at least what could be coming to the corvette torque convertor automatic

 

Want to try Launch Control on an auto? Drive any Porsche 911. Boxster, or Cayman with PDK and a Sport Crono package and you will find out.

Press and hold brake, press gas, let go of brake when car beeps..........zooom!!!!!!!!!!

 

At the museum on Thur the plant manager stated the automatic has launch control.
C5-JIM

 

Does the C7 A6 beep for launch (when it's time to take foot off brake)?

 

You take your foot off the brake when you're ready.

 

I wish I could get an explanation for the launch control for an A6, because everything I've read including the manual isn't how it works with my C7. I tried 3 times in time trials & one bracket run & every run my car would *cough* poof! *cough* ack! for about second maybe two after I'd release the brake & then finally take-off. Problem is, we're already a second or two into a 1000' drag & my C7's doing it's impression of WonderBug!




Yes, I've read, reread, & reread the manual nevertheless I tried the Launch Control in Track with PTM in Race, Sport2, & even without PTM. There wasn't a single time I felt the RPM's come up & stabilize. The brake pedal was bottomed out to the stops & gas was all the way to the floor. You'd think they could have splurged on a switch or something more definitive, maybe even display something on my car's dic... Okay there's no way I can type that without it sounding ridiculous.

Wormwood

 

I feel your pain. I have an a6 mag ride. Same thing here. Wheel straight, brake to the floor, track/ Ptm mode, gas on the floor. Bogs down at 1800-2000 RPMs, hesitates then goes.

The best off the line method for an A6 for me is. Track mode, turn off traction control, brake to the floor hit the gas pretty hard ( not too hard do you spin the wheels). No Ptm mode required.

Anyone else have any suggestions ?

 

Would u believe this is exactly the way we launched an auto trans in the 50s and 60s. Of course in those days we were no match for the 3 on a tree. Not so any more!

 

Based on some of the reply's in this thread, the C7 auto doesn't really have launch control in as far as the manual's do.

If holding the brake and pressing the gas up until the wheels start to spin is considered launch control, all autos must have it...

I have the M7 and tried the launch control a couple times - it's pretty good. The wheels still spin a little but not excessively.

 

Can you define/clarify some of your terms for the newbies like me who have never done any racing (I've never had a car that could!)? What does hook up/hooked mean? I assume it has to do with the tires not spinning, but not sure. What is converter flash? Never heard this term before.

 

If you have a Z-51 automtic with magnetic ride and go into Track mode, launch control is available. My car is still to new to try it, but the owners manual says it can be selected and used in track mode on automatic equipped models. Just stop the car, point wheels straight ahead, apply foot brake with firm pressure, floor throttle, then release brake and hold on!
If you try it in any other mode, you will just be "brake torqueing" the car, and this is bad for tranny and driveline in the long run, but can be done on any auto equipped ride.

 

A6, mag ride.

Manual says:
Track mode>any Ptm mode>wheel straight>brake hard to floor> gas on the floor> and release break and hold on! (however, it doesn't work) engine will bog down around 1800-2000 RPMs

 

That's the point I need to make, mine is a A6 with MRC. I set the drive mode to Track & double press the center button to enable PTM. Then jog over to RACE setting within the PTM menu. set the steering wheel straight. Press the brake pedal to the floor (which you can feel the pedal hitting a hard stop) & then the gas pedal goes to the floor next just like the brake. At that point the car torques up rising on the left side slightly as it's trying to barber pole the torque tube or snap an axle shaft. At no time does it feel like a system is active or controlling anything. Once the brake is released the engine loses power & ignition for a split second as it misses but recovers. I come away with a reaction times of .9759, .7236, .8935, & .8666. That is releasing on the last yellow light & though I wouldn't expect < .4000 times but I never had to ride a short bus to school either...

All of the video's I've seen of the C7's during launch control none of them look like they're torque braking like mine does. This is frustrating but I can't find any documentation regarding launch control other than the manual.

GM has got to stop treating customers like mushrooms....

Wormwood

 

Frustrating!!
If you find out what is going wrong with the launch control on the A6 mag ride please let me know. GM should address this

Thanks

Al

 

I'm having a problem getting it to work with my 7speed manual (non z51). Read the manual several times: put car in track mode, enable competition mode (press stabilitrack button twice--confirmed on dash), straight wheels, clutch in, gear in 1st, apply throttle, release clutch. My wheels skip like crazy. Not smooth take off. Is there any indicator that launch control is on? I don't know if I'm doing it wrong or if it doesn't work...

 

 

I have a Z51 automatic WITHOUT mag ride.

I was planning on using it normally in Sports mode - do you think it would launch better in Track mode instead?

Do you recommend not braking at the same time as pressing the gas if there's no mag ride?

Since I don't have mag ride, is there still a "launch control" available to me?

 

subscribed

 

yes, of course auto trans has launch control. Read your manual (good manual for the price); 9-45 [there are several other threads on the subject, but few apparently have read it since many dont even know if the auto has it]--see partial below[auto has to be in track mode; vs. econ, weather, tour, sport, unless mag ride--maybe, unclear]:

Launch Control (Track
Mode Only)
A Launch Control feature is
available, within Competitive Driving
Mode (except Z51 with Magnetic
Selective Ride Control) or
Performance Traction Management
(Z51 with Magnetic Selective Ride
Control), on all vehicles to allow the
driver to achieve high levels of
vehicle acceleration in a straight
line. Launch Control is a form of
traction control that manages tire
spin while launching the vehicle.
This feature is intended for use
during closed course race events
where consistent zero to
60 and quarter mile times are
desirable.
Launch Control is only available
when the following criteria are met:
. Competitive Driving Mode is
selected (except Z51 with
Magnetic Selective Ride Control)
or any of the Performance
Traction Management modes
are selected (Z51 with Magnetic
Selective Ride Control). The
TCS light comes on the
instrument panel and the
appropriate DIC message
displays.

 

I called a local service manager recommended by the corvette club. It was after 5pm so I made it quick & explained the issue with Launch Control. He said he'd print out what he could find? I guess he meant the service manuals are on disc or online..?

Hopefully we'll get something in a little more detail tomorrow, I'll post whatever he gives me.

Wormwood