Any auto trannies in here?

dvtr- · May 21, 2009

Ill soon be installing a vortech v2 w/ charge cooler on my stock 01 gt(auto) how is it that you guys go about racing it?
First of all how do you launch an auto, without fking it up(neutral drops)?
and second what techniques do you use when youve already launched?

I have an idea but maybe you guys have something that works even better.

Please no flames =)

BlownStangGT · May 21, 2009

Your best bet would to leave the car in D (Drive) with overdrive turned off of course when you are running down the track and when you launch. DO a little burnout and go to the line. When the light turns green let her have it! No n-drops

sneaky98gt · May 21, 2009

Here's what I do.

1. Do a burnout; small, but enough to clean any dirt or water off the tires. This is assuming you have street tires.
2. Ease up and pre-stage.
3. Hold the brake almost as tight as you can; build up the RPM to....say...2000. This will be more or less depending on lots of things: stall or not, torque the car has, tire size, etc. Basically almost as much as you can before it starts spinning.
4. Stage by just easing off the brake. Then hold it back tight as you can again once you stage.
5. When the 3rd yellow flashes, let off the brake and hammer down. But don't anticipate the 3rd yellow.
6. As Jerry Reed best said it, "Hold on your @$$, Fred."

Now this probably isn't gonna work as good on a blown car like yours, but you'll just have to keep working at it until you get it right. Main thing is to just practice. And don't neutral drop it. Your tranny will go boom very quickly.

-Will

isjoining · May 21, 2009

you need a transbrake if you want to launch at a certain RPM.

dvtr- · May 21, 2009

isjoining said:
you need a transbrake if you want to launch at a certain RPM.

Transbrake hm? Where can i get this, and do i need anything else?

dvtr- · May 21, 2009

BTW those are some good tips guys, keep them coming.

isjoining · May 21, 2009

dvtr- said:
Transbrake hm? Where can i get this, and do i need anything else?

you'll need an aftermarket valve body. Performance Automatic makes them, I'm sure there are others but thats the one that comes to mind.

dvtr- · May 21, 2009

isjoining said:
you'll need an aftermarket valve body. Performance Automatic makes them, I'm sure there are others but thats the one that comes to mind.

so i need a transbrake switch and a new valve body? that it? =)

CobraRed_96_GT · May 21, 2009

Explain to me why he needs a tranbrake or aftermarket valvebody. My valvebody is a reworked OEM, doesn't mean i need a different one to track it.

Read this, i'll be updating it with 4R70W build specific info soon.
Last Call Racing Customer Forums • View topic - Torque Converters and Automatics

007 · May 22, 2009

CobraRed_96_GT said:
Explain to me why he needs a tranbrake or aftermarket valvebody.

Right. You dont need that. A shift kit / Jerry mod will help with the shifts and you should definitely install a better tranny cooler (they are cheap).

isjoining · May 22, 2009

thats why I said if you want to launch at a certain RPM

way to read i guess....

dvtr- · May 22, 2009

isjoining said:
thats why I said if you want to launch at a certain RPM

way to read i guess....

yo everyone needs to just settle down,
anyway "isjoining" do i need just these two? please confirm on what i need exactly.

-thnx

isjoining · May 22, 2009

that depends..do you want to control which RPM to launch at? if not then follow advice given in the first 2 replies, getting a shift kit or doing the jmod won't tell you how to launch but it will help with firmer shifts and longevity.

a valve body with a transbrake will let you launch at whatever RPM you want.

CobraRed_96_GT · May 22, 2009

You choose what rpm to launch at by brake stalling, very few people opt for a trans brake. I'm not sure what he means by transbrake and valvebody, as a transbrake is a solonoid operated valve within the valvbody that locks the trans against itself so the converter can stall - but neither are needed for a good launch on a street car. Torque converter will affect that most from you're perspective. The main benifit of a t-brake is allowing the TC to meet its max stall before applying it to the driveline, if you have a stock TC this wont be significant - it'll just make launching a lil easier, which practice will do as well. suspension and tire will be much more fruitful at this point.

speed545 · May 22, 2009

Depends on your expectation at the track.

I foot brake at around 1600-1700 with a stock 4R70W with cooler and shifter.

see Et in sign

manny · May 24, 2009

i hope i dont sound stupid but i do understand about the shift kit and a better tranny cooler but i dohave to ask what is the J-mod?

dastang2 · May 24, 2009

i did the j mod and installed a 3600 stall with 410's. and also puttinga v2 as soon as i find a fuel pump. j mod is where you drill 5 or 6 holes bigger in the stock seperator plate of the valve body. it allows more flow of fluid and higher pressures to quickly shift 1-2 and 2-3.

DBMSTNG · May 25, 2009

i have an auto with a Vortech. the J mod is a must in my opinion. my car would not shift fast enough from 1-2 without it. it would bang against redline. i've found that i can pull a 1.9x on 245 street tires with and without stalling the converter. try both techniques at the track and see which works best for you.

agentl074 · May 26, 2009

Auto here. No neutral drops = bad for transmission. Brake launching can wear out breaks! Use a good stall torque converter/shiftkit - make sure you have a HD tranny cooler and leave it in O/D off for good top mph and time

blacknsilvr · May 26, 2009

opcorn: He had me at neutral drops.........sorry.

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