Ok, i was never really into raceing all that much but after doing it a few times and realizeing how fun it can be when done responsably ive decided to start reading up on it.
What i was doing, was just sitting at a red light, not reving it up at all or anything and starting from there, but somebody recently told me about launching, getting it around 3k or as high as you can get it without spinning the tires to get out of the gate faster.
My question is.. i have a 2500 stall in my car, how should i go about doing this, i understand what this means, its basicly like holding my foot on the break wile reving it up to 2.5 without holding my foot on the break.. should i just floor it with the stall in and it will do the work for me, or what...
Basicly, my question is, how do you do a proper launch with a stall converter, this is my first car with a stall and im not sure how to properly work it at the moment...
Go easy on me guys, im still learning

 

this is how i launch press the break as hard as i can, then i press the gas till the breaks can barley hold the car, then i when the light turns green i let off the break and press the gas down as quick as i can with out roasting the tires.

 

Launching is a tricky thing for beginners, but You just have to find that fine line between roasting the tires and hooking up the tires. A 2,500 stall converter doesn't necessarily mean that it will stall at 2,500. It's just a general rating and they will react differently in similar engines. A stall generally just squeezes the rpms up quicker and gets Your car into the sweet spot faster. You should go to a dragstrip and fine tune Your launch. Play around with tire pressure, try foot braking it at different rpm's and different pedal mashing techniques to get the best 60 foot. General rule of thumb is that, every tenth second of reduction in Your 60 foot will reward You with 2 tenths of reduction overall at the end of the track.

 

hold the brake give it some gas and find the cars happy spot...

If you were tp have a manual drive car its alot harder..

 

Yea, i tryed it in my buddies 94 m6 and i had to hold the brake and the clutch at the same time and ended up stalling it anyway... but luckly i dont have a manual.
So basicly the trick is just to find the spot that will give you the most umph off the line (torque?) and not so much that it spins the tires. I thought having a stall would effect this somehow, could some please explain exactly what a stall convert does in simplest terms for me?

 

TCI Automotive® - Torque Converters Explained

 

overly simplistic and not very detailed but nutshell enough explanation to get a basic understanding

it's where the coverter starts to transfer energy from the motor to the transmission. just like releasing the clutch.


now a little more detail.
the converter is very inefficient under a certain speed. under that rpm it just slips more or less not transfering much energy to the transmission. this allows you to sit at the light with the foot on the brake in gear without killing the car like you would with a manual in gear doing this. above that rpm point it doesn't slip as much. one thing though to add a little more confusion kinda like what was said above is even a stall rated at 2500rpms doesn't mean it is always going to stall at the same rpm. these are all torque based. if you ease onto the gas it is going to stall lower but you floor it you have more torque twising that convertor which will make it "lock up" a little sooner. kinda like you take a little scrawny kid pushing on your vs mr 380lb lineman getting a running start.

 

so um not to changed for auto to manual but instead of starting a new thread coudl somone explain to me how to a good launch wiht a manual? my ways works but i dont have a posi right now and i spin alot

 

I will give you 2 examples

1. Launching an L98 car on the streets: depress gas as rapidly as possible without blowing tires off

2. Launching a 4.6 5 speed Mustang on the streets: rev the car up to around 2000 and dump the clutch. The trick is getting the tires to spin (and they will) after the clutch dump but having them hook up right before the car starts to really pull, 4.6's and LS1 cars like to pull past 3000 and don't have the torque an L98 or more torque oriented car does

If you want to lauch with your stall then you want to get the car out of the box without ripping the tires off, but at the highest RPM possible. If you try and brake torque the car to 2000 and it spins worse when you let off the brakes and mash it, try 1500 rpm. Every car is different and it really depends on where they make there power at and how the suspension/tire combo will hook on your particular road. Add nitrous to this equation and it gets even funner. The good news is the best way to learn is to try it, just don't get a ticket for unsafe start