To stall or not to stall ???

**Tucool** · 28-01-2009, 11:32 PM

G'day all,

I have a ZF 6 speed auto in my ute and knowing nothing about these boxes ..
could anyone give any advise on the best way to launch at the drags.... another competitor was talking about something called flash stall speed verses actual stall speed ??????? I'm lost

:

GTP owner · 29-01-2009, 08:18 AM

Stand on brake hard, stand on accelerator as lights come down, and let go and enjoy the ride!
What motor? Turbo, v8 or i6na

**Tucool** · 29-01-2009, 10:51 AM

It's a V8....

GTP owner · 29-01-2009, 11:28 AM

Some try to stall in 2nd gear, then whack it back into 1st an launch to get a higher stall. I don't like the idea of stuffing around with the box like this.

The flash stall speed is when you plant the foot and the revs rise rapidly up to a point. If you hold this the engine will drop revs as a gearbox protection strategy - this is where they are referring to the actual stall speed. They are using the wrong terminology for the second one because it is the ecu dropping the revs, not as a result of the torque converter resistance.

Quicksand · 29-01-2009, 02:00 PM

Last i heard, there wasn't any stallie available for the ZF6 yet, but a tuner could remove the Torque Tags in the box through the SNIPER/CAPA software to allow us to rev past 1200 RPM in first. Or you can try the 2-1 shift technique as described by GTP_Owner.

Obviously this introduces more risk to the drive line etc..

**Tucool** · 29-01-2009, 02:49 PM

Sounds like good advice Men... I'll just stick it "D" and plant the foot

... I have tried a couple of the ways you have explain..and found just stomping on it to be the fastest so far.. :eclipsee_

northey · 30-01-2009, 10:48 PM

Quote:

Originally Posted by Tucool

Sounds like good advice Men... I'll just stick it "D" and plant the foot

... I have tried a couple of the ways you have explain..and found just stomping on it to be the fastest so far.. :eclipsee_

That's basically flashing it anyway. Getting the timing (of your feet) and the tree right is the tricky bit.
Dropping the box back into 1st as posted above is definitely not the good for the gearbox.

schnoods · 31-01-2009, 05:43 PM

Quote:

Originally Posted by Tucool

Sounds like good advice Men... I'll just stick it "D" and plant the foot

... I have tried a couple of the ways you have explain..and found just stomping on it to be the fastest so far.. :eclipsee_

Same here.

Out of curiosity, what are your 60 ft times?

**Tucool** · 31-01-2009, 06:45 PM

Howdy neighbour....at least in the same state

Have got my 60 ft down to 2.2, 2.3 sec. at the moment... making a couple of minor changes this week to hopefully get down to 2.0

**Stav** · 02-02-2009, 04:14 PM

Quote:

Originally Posted by Tucool

G'day all,

I have a ZF 6 speed auto in my ute and knowing nothing about these boxes ..
could anyone give any advise on the best way to launch at the drags.... another competitor was talking about something called flash stall speed verses actual stall speed ??????? I'm lost

:

He talks too much

flash stall speed is when you are sitting there and just plant your right foot.The revs flash up and the stallie grabs at a certain rpm. This rpm is called flash stall. Brake stall is how high your gearbox rpm can go while holding the brakes and accelerator.
Thirdly actual stall spped is achieved with a trans brake.This allows the gearbox to be locked as the revs are brought up and then are released.

In any case the weakness of a stall convertor is traction.Youll need tyres and suspension to do the job!!

blackers10 · 03-02-2009, 08:27 AM

in a BTR 4 speed auto with a single spinner and 20" wheels with 245/35R20 Fullrun(hard as plastic) rubber
and a 2400rpm highstall in my au fairlane.. i pulled a 2.290 60ft.. for a car that big and heavy with 20s and a big sub box... and a single spinner diff..i think i did quite well...
in saying that.. stalls are AWESOME for the drags.. and making noise on the street...
no good for going fast around corners haha

**Falcon Coupe** · 07-02-2009, 03:34 PM

Quote:

Originally Posted by Stav

He talks too much

flash stall speed is when you are sitting there and just plant your right foot.The revs flash up and the stallie grabs at a certain rpm. This rpm is called flash stall. Brake stall is how high your gearbox rpm can go while holding the brakes and accelerator.
Thirdly actual stall spped is achieved with a trans brake.This allows the gearbox to be locked as the revs are brought up and then are released.

In any case the weakness of a stall convertor is traction.Youll need tyres and suspension to do the job!!

So stalling on the brake gives gearbox rpm but a transbrake locks it.