Did a couple LC starts over the weekend (430) and the car only impressed on one of the 4 attempts. Can someone explain in better detail the correct procedure to execute this ? Aside from getting it into CST off and engaging LC, standing on the brake.... any advice on what rpm to pop at ? We tried 5k, 6k and almost redline before letting go of the brake. The car spins tires each time, and attemptiing to shift before redline is tricky... most of the time, the engine bounces the limiter at least once before the transmission has a chance to shift. What should we try... shifting it at 6k-7k instead or shoot for 8k to hit the paddle ? The basic standing 'performance start' was more impressive... and we don't want to burn the clutch 'trying' to get a good launch... X2
Proper is not to use the launch control about 7-8 times LC and the clutch is burned and should be replaced. So it is a bit pricy....
the new 997 gt2 albeit being manual also has a launch control feature, that allows for fastest sprints while actually decreasing the load on the hardware....clever huh ?
It will probably get less impressive each time you try it as it is frying **** out of your clutch. Probably wise to call it a day on the use of it unless you fancy a new clutch every couple of months
doesnt sound like you are following the right procedure for a LC Launch. run thru the sequence with us for your LC launch
http://www.ferrarichat.com/forum/showthread.php?t=73664&highlight=launch+control may or may not be right, just passing on what I have read.... There are plenty more threads, but I guess if one is that interested in the issue they can read them all
It seems the answer lies within your post. Since you are spinning the tires too much and not getting good grip, you should try a lower rpm. And as the tires hook up you should practice how to modulate the throttle without excessive tire spin thereafter. Usually the throttle should be rolled on deliberately at a measured rate rather than just stomping on it.
Thanks, nice of you. I got this information from Ferrari mechanics and engineers. My Ferrari dealer told the same.
A call to the manufacturer duplicated the info from the dealer. Launch Control will substantially reduce clutch life and they estimated around or less than 10 launches will encourage a clutch replacement.... so I am well aware of the potential downsides.... but it is to be expected doing clutch drops with a near 500hp car We did try almost the lowest rpm necessary for LC and it still resulted in massive wheel spin. I also appreciate the sentiment of throttle modulation... but it's much easier said than done without much practice (and maybe a couple clutches) as the car hits redline in 1st gear unreasonably fast once the tires start spinning... which is immediate. I will scour google for that top gear and see if Clarkson has the formula for success. If all goes well, we will take it out to the drag track on Sunday and see what kind of time it puts down on concrete.... I don't have high hopes for the pirellis in a straight line. BTW... they should change LC to LS: "Launch Sideways"
right on man! hats off to you! i say why even have a lc feature if you aren't going to use it?! any way you can get us a video of your drag runs / launches? actually .... that's it, I'm taking a break right now and going for a drive! you've inspired me! (oh, and sorry, i have no idea how to answer your questions)
^^ WHat clutch ? hehehehe I will bring along a digital camera next time (or if we go to the track this weekend). Took a video of a 0-125mph burst the other night... but it was off a rolling start and was pretty dark... not as nice as I would've liked.
What tyre pressures do you have in your rear tyres? What are your tyres like? Are they new or worn? What is the road surface like? New or worn? Smooth or rough? There are many factors to consider, that you must also not forget mate. Dont stress too much about not being able to get a good start. Even the best struggle sometimes. Not that I am an expert in launch control, but I would lower RPM to avoid wheel spin from the start. This will then allow you to hit 2nd gear without it shooting straight to rev limiter because the wheels wont be spinning.
This doesn't seem intuitive. Whilst doing an "emergency start" will inevitably place extra stresses, wear and heat in a clutch, doing the same with and without the LC, it would seem intuitive that using the LC would reduce the wear compared with a similar takeoff without it. Otherwise, what is it for? Also, if the result is wheelspin, intuition would say that the tyres are then acting as the slippage and not the clutch, and therefore it would seem sensible that the clutch is not suffering as soon as the wheels are spinning. So are we saying that an emergency start is wearing out the clutch, or that the launch control is? Put in another way, if I were to floor the thing at the lights with traction control off but no LC, would I be putting more or less stress on the clutch? Other cars I drive hard, with a conventional clutch and H-box, I accept that at some point the punishment will result in extra maintenance. That's the name of the game. Are you saying that the maintenance will come much sooner as a result of the F1 or LC, or just that driving a heavy car hard will result in wearing the clutch quicker? Regards Andrew
Under normal circumstances with a normal car, I would assume the tires would take the most abuse. BUt to answer your question, flooring it at the lights would put less stress on the clutch... LC revs the car up high and engages the clutch... THEN you get wheelspin... LC probably puts less stress on the engine. I am not saying it, Ferrari is. Plus this box may mimic a manual transmission, but it still relies heavily on computer control, so I'm not pretending to understand the intricate inner workings of the F1 box... but the clutch is twin disc and small diameter... I can understand why it could wear easily in these situations.... But this isn't a toyota, so I'm not willing to completely burn a brand new clutch to find out if they're joking around (ok... maybe in a couple months) Ok... I searched for the vids recommended and they didn't go indepth as to how he used the LC (fifth gear). He just pressed the button and went... and like many things you see on TV... it just doesn't work that easily. Any other blokes gave this a whirl ??
