I hope this isn't a repeat but I ordered a 2014 z51,2lt and I was wondering will it have launch control and how much difference does it make? My last vette 2005 c6 I had a lot done to it but I had loads of trouble hooking and I'm wondering if launch control helps a lot or alittle.

 

If you ordered a 7 speed, not the auto, yes it will have launch control.

 

No launch control for the auto?

 

Auto is much easier to launch, doesn't really need it.

I'm wondering if they did some work to make the launch control better. The older versions helped an average driver, but a good driver could get better launches without it. I would think that with enough work on the algorithm and the quality of current sensors the launch control could do better.

 

Yo.. It comes with both transmissions...

 

Really?! How do you use launch control on an auto? Hold the gas and brake. Where does launch control come in?

 

The only car I've driven with launch control was a 2012 gti dsg. You put your feet on the brake and gas, start to rev the engine, a little sound dings to take your foot off the brake and the computer adjusts the rev and you goooo!

 

It is called a trans brake. If you put your foot on the brake and give it throttle the car will move when the torque converter locks up. That is not launch control. Automatic drag cars have been using a trans brake for years. Google it.

If you read the C7 order form you will clearly see that the automatic has launch control.

 

Interesting... It's been so long since I've launched an auto, I forgot that you still need to modulate the gas.

So I guess the launch control is a more refined and specialized traction control.

 

This is how a trans brake really works. it has nothing to do with the convertor locking up.

"An automatic transmission transbrake is a modified or aftermarket valve body which puts the trans into first gear, and reverse gear at the same time. This is done in part by applying electrical voltage and current to the valve body assembly. As long as power is supplied to the valve body the vehicle will not move. This allows the engine to be brought up to a higher rpm than what is possible when "foot brake" racing. When the brake is engaged, there is no torque being applied to the driveshaft, so the suspension is also in an unloaded state. When current is removed from the brake, the reverse component of the trans is released, and torque is applied to the driveshaft very abruptly. This "hits" the tires harder, more like what a manual transmission car does when the clutch is released. Since the transbrake is controlled by applying an electrical current, it is also the preferred method of controlling when the car launches when using delay boxes and other modern drag race electronics."

This is the opposite of launch control. The trans brake allows you to hit the tires(normally drag slicks with a lot of traction) hard to get a sudden high engine RPM launch.

 

That's really cool, actually.

 

so how do you guys suggesting launching the C7 auto - press the brake and gas at the same time then let go of the brake, or just press the gas alone when its time to launch?

 

No. That is not launch control..when you go up against the torque converter you are limited to lock up. That will not launch as hard as it could.

See Joes explanation above..I never said that torque converter lock up has anything to do with launch control..

 

My Z06 does not have launch control and I've never driven a C6 with it.

My understanding of how the launch control works on a manual transmission is that you push the clutch pedal to the floor and then you push the gas pedal to the floor. The computer modulates the throttle body to maintain 4,000RPM(I think) even though the gas pedal is floored.

You hold the gas pedal to the floor, release the clutch pedal as quickly as you can, and the computer then modulates the throttle body, working in conjunction with the traction control, to control the wheel spin to give the best acceleration.

I'm guessing that launch control with the auto transmission works basically the same.

You push on the brake pedal with your left foot, then floor the gas pedal with your right foot. The computer modulates the engines RPM to hold it just below the point that the convertor won't slip anymore, even though the gas pedal is floored.

Then you release the brake pedal, while holding the gas pedal to the floor and the computer modulates the throttle body, in conjunction with the traction control, to control the wheel spin to achieve the beat acceleration.

In both cases it's truly a stab and steer from a dead stop. Only difference between the two is that after the take off from a dead stop, with one of the transmissions, the driver is going to be actively involved in the shifting using the clutch and shifter.

 

Does the C7 manual have the launch control you speak of bc my C6 sure didnt.

 

so how do you recommend launching an automatic c7?

lol sorry i'm a noob at this stuff.

 

foot brake.

1) foot on brake and foot on gas
2) give it gas to the point BEFORE the rear tires overwhelm the rear brakes
3) release brake and floor gas simultaneously (may have to play with this bit as you may not hook up all that well. say 50% throttle at launch or whatever stays hooked)

theres more complicated things like flashing the converter right at launch to get more bang. torque converters multiply torque, the peak of which is produced when the converter is flashed.

 

Launch control is necessary for magazine testers...they can't drive for sh t off the line...in a car they only have for a few hours or days...

It takes time for owners to figure out the best launch techniques so why would it be different for magazines testers..

Manufacturers are smart to offer easy launch control to assist magazine editors the consistent fast times...

 

I believe the purpose of the C7's launch control is so that the computer figures out how much gas to give the car. Just hold the brake, floor it, and let the computer give you the best launch when you release the brake.

 

It was available on the later years C6, not the early ones.

I believe that it is standard on all C7's but not entirely sure of that.

EDIT:. just checked and it appears all C7's have launch control, both auto and manual, both base and Z51.