dsmlink launch control on automatic

[britdog]

So i was wondering how the 2 step launch control is activated on an automatic car.WTF How do you engage it? and then set it to launch when you want it to? i know my buddeis is with the clutch but mine is automatic. thanks

 

[ed1380]

No 2 step necessary for an auto. You launch with brakes and gas pedal. It's called brake boosting

 

[Boostinsideways]

Hold your foot on the break, rev it till the tires start to spin, let off the break. Have fun. You probably aren't gonna break em loose if your AWD.

 

[Cesarlcase]

Kiggly uses 2 step on his auto

 

[O HAI]

its possible but brake boosting is much easier and just as effective

 

[britdog]

break boosting only goes liike 2k i need way more its a really crappy launch

 

[rEclipserGST]

break boosting only goes liike 2k i need way more its a really crappy launch

How much psi are you building on these "really crappy launch" that you are pulling?

 

[O HAI]

You could wire a switch in to the brake pedal to trigger the 2step.

 

[em5780]

Agreed you can wire it with the brake, but if your not revving past 2000 because the car is inching forward the ebrake will help hold ya back little more work but you'll be able to launch harder.

 

[knochgoon24]

It's been a while since I've messed with DSMLink at all, but does it have launch timing and fuel maps? If you pull timing and add a little extra fuel, you might be able to get a little more boost out of it before pulling through the brakes. But if you want a really good launch, you need to get a restalled torque converter.

That said, with my 16g, I can build quite a bit of boost. I pull through the brakes before the boost stops building.

 

[4g63jojo]

2 step is an after market you have to buy and install if you have factory ecu there is no 2 step to activate , well kinda u could call the factory rev limit a two step kinda not really tho, u would need 2 buy a standalone with 2step built in or something like Bee*r or if i remember correctly brad has a chipped ecu with a 2step built in it but last time i checked the guy who has the website who does all that dont do it anymore.

break boosting only goes liike 2k i need way more its a really crappy launch

brake boosting is done from a roll, you apply slight brake pressure while going a certain speed to increase load on the engine therefor bringing it out of vacuum and into boost that way when the hammer is dropped you are making boost already instead of having to build boost, what you are referring to is called "stall speed" stall speed is when you are stopped , the max rpm the torque converter lets the engine spin with your foot on brake pedal and foot on gas, the only way to make more RPM's with an automatic launch is to install a high stall torque converter solving the weak launches 2k launches

 

[johnmarines]

the only way to make more RPM's with an automatic launch is to install a high stall torque converter solving the weak launches 2k launches

This is not correct. The tune has alot to do with it.... on the smaller turbos...14b... 16g...20g... you can launch with boost off the line.. there is also the nitrious for the bigger turbos.

 

[4g63jojo]

This is not correct. The tune has alot to do with it.... on the smaller turbos...14b... 16g...20g... you can launch with boost off the line.. there is also the nitrious for the bigger turbos.

yes that is correct, you cannot "tune" a higher stall speed, plus i am not talking about boost i am talking about "RPM"....................the op wants a better launch and no matter how much boost you can build or what turbo you have, if your converter stall speed is 2000rpm its gonna be a granny launch

 

[clipto]

There are a few reasons to use a two step. One is to adjust the launch for varying track conditions. Another is to provide repeatability, as the stall of a converter is different based on temperature. Also when you're 2 stepped below the stall speed, you have more torque multiplication.

 

[jed344]

How much boost are you building on your launches? i usually launch at bout 7psi at 5500 rpm but im a 5spd. But i imagine with just boost breaking you could build quite a bit of boost as well to compensate for the lower rpms.

 

[4g63jojo]

How much boost are you building on your launches? i usually launch at bout 7psi at 5500 rpm but im a 5spd. But i imagine with just boost breaking you could build quite a bit of boost as well to compensate for the lower rpms.

I am sorry to sound repetitive and/or rude, but I am against the spread of bad information and there is a lot floating around on this tread. It seems like there is some confusion on the topic at hand or people do not know what they are talking about. Nothing against you guys, please don't take personal. I just want to help the OP

But, like I posted earlier, "brake boosting" is a tactic used during pulls from a "roll", not a tactic for launching. The thing being discussed in the OP is "'2 step" and the 2000rpm "stall" and the weak launch that comes with the factory stall speed. After reading carefully the issue seems to be he wants a more powerful launch and wants to know if a 2 step can help. Now, if he was to install a 2 step controller and set it for higher RPM's, the converter stall would not allow the engine to go past 2000rpm, rendering the two step useless. IMO it makes no sense at all the two step an auto car, the way to get better launches with more RPM and more boost is a higher stall converter.

So i was wondering how the 2 step launch control is activated on an automatic car.WTF How do you engage it? and then set it to launch when you want it to? i know my buddeis is with the clutch but mine is automatic. thanks

Now, with all that said, the OP has "specific" questions and it seems nobody on here wants to answer them, they want to spit out useless facts.


question 1. You cant activate your 2 step because you do not have it. After reading your mod list you have a factory ecu. The factory ecu has no 2 step launch control, you will need a standalone ecu (dsmlink, aem, etc etc) that has it built in.

question 2. you cant engage it you dont have it.

 

[britdog]

I have a build list and I haven't gotten dsmlink yet it will be around next summer. However my buddy and I were wondering if you can use the launch control on an auto car.

 

[turbo23]

I'm wondering why your only able to get 2k out of it at launch.. I've been in a few auto 16g cars that were mostly stock, and they would hold to 3 to 3.5k.. the more power your make the higher the stall rpm will become, i.e. as you start building boost rpm will increase. if your just not building any boost, then somthing else is wrong.. air leak, tune.... somthing along those lines. however, if your starting to build boost and its pushing through the brakes make sure all your brakes are working properly. also do some searching about auto launching, there are a few threads about launching auto technique , and other ideas for holding back the power through the brakes. You can use a 2step with an auto, but as 4G63jojo said if your not able to pass 2k then the 2step isnt going to help. all it will do is limit the rom the engine will reach during launch, which is usefull for a consistant launch, but it will not help you build boost.. launch control (anti-lag) would help you build boost.

 

[Boostinsideways]

Jojo you have almost no clue what in the hell your talking about. You can setup launch control with DSMlink on the factory ecu.

And brake boosting, in the case were talking about is also known as brake torquing, its when you hold the brakes to build the revs and get a better launch in an automatic. The factory stall is pretty low and its pretty hard to get a great launch with a factory torque converter because of the low stall. Both are perfectly valid launch methods.

 

[caseyrock]

You can just set the 2-step for around 1900rpm and retard the timiming ALOT and bumo the fuel enrichment ALOT. It should get you a few more pounds at that rpm

 

[zachyd23]

My car only holds to about 2200 rpm's also. If I get my e-brake fixed, I could use both for a better launch? Or does that not matter with stock stall converter?

 

[Bud92gsx]

Auto 1g's and 2g's are way different than the other..

Auto 1g's ecu retards timing screwing up the launch if you brake boost for too long..This can be fixed by swapping in a 5speed ecu, 450's and manual fpr...I could get about to 10 psi on a 16g by brake boosting..

 

[zachyd23]

Auto 1g's and 2g's are way different than the other..

Auto 1g's ecu retards timing screwing up the launch if you brake boost for too long..This can be fixed by swapping in a 5speed ecu, 450's and manual fpr...I could get about to 10 psi on a 16g by brake boosting..

I have a different ecu and manual 450cc injectors.

 

[91stocker]

My car only holds to about 2200 rpm's also. If I get my e-brake fixed, I could use both for a better launch? Or does that not matter with stock stall converter?

Whats your tune look like? Auto's love high timing and lean afr's.

 

[zachyd23]

Whats your tune look like? Auto's love high timing and lean afr's.

No tune yet, hopefully dsm link after Christmas.