Code changes for Evo 1-3 ALS with launch control

[AndyF]

Following on from the code changes for the launch control, if you want it to retard the timing as well then you need to do the following changes on top of those already made to get the launch control active.

At address 40DE you should have the following code which is part of the calculation to set the new timing value

DB 90 25 04

you need to change this to read

BD DC 20 01

and then at location 5C20 add the following in

DB 90 25 10 01 96 CA 81 1E 23 0B FE 01 69 8C 03 41 24 03 C6 BC 01 39

and that on it's own will set the timing to -5 degrees when the launch control is active.

You can then use the XDF I've posted up with the ALS/launch control settings defined to decide at what revs the ignition retard will be activated and also what speed it will stop activating at along with how many degrees you want to set it to.

Be warned though that enabling this and launching with it on will shorten the life of your turbo depending upon how much retard you use.

But hey... it's worth it for the sound alone :lol:

Andy

[soldave]

It is a nice feature. For the record, I have launch control set at 5500rpm with a 5 advanced ALS coming in at 5200rpm. I spin tyres through 2nd gear anyway so more boost on launch isn't going to help me. At 5 degrees advanced I'm building up around 0.8bar of boost at the line.

[astraj]

I wish to fit antilag and launch to my Evo 3 rally car.Please advise?

[soldave]

It's detailed in the 1st post here.

[Smutt]

Ive done all the above changes except for the one at address 40DE.

40DE doesnt exist in my hex file, see attached.

Will this still work? I couldnt even find the code (DB 90 25 04).

Is this because I am using a early GSR 1.8lt Turbo Ecu?
Could you find the equivalent address in the attached file?

thanks

[AndyF]

40DE exists in your file and is correct in terms of the code that you should find there....

What are you using to view the hex file?

Andy

[Smutt]

Im using tunerpro to view the hex file.

I did find 40DE, I made a Novice mistake, I was looking down the list at the written address, 40DE was found once I "arrowed" across.

Thanks Andy!