Launch control

Nedim · **Joined:** Sat Jun 29, 2019 2:08 pm **Posts:** 86

Hi! I am trying to make launch control. I made this tables but notting happen. Is it another way? Thank you!

Richard · **Posted:** Mon Sep 02, 2019 1:10 pm

Nedim wrote:

Hi! I am trying to make launch control. I made this tables but notting happen. Is it another way? Thank you!

Doesnt work

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lucasp · **Posted:** Wed Sep 11, 2019 10:29 am

I don't know how to do it, run the control in ms42 but it can be 100%.
On YouTube, I watched a guy do it in ms41, so it can be done on ms42. In MS41 it limited its turnover to 2 km / h

Breeze1 · **Joined:** Mon Apr 16, 2018 9:28 am **Posts:** 243

I haven't tried it myself, but following your logic and the tables shown, if you want launch control you want the revs to be limited to a certain treshold determined by yourself (e.g. 3000rpm) while the vehicle is standing still.

In your tables, when the vehicle's speed is anything less than 28kph the revs are limited to 6880rpm, or in another words, NOT limited. And at higher vehicle speeds, limited to respectively 448 and 512 rpm, which doesn't make sense (those are not even idle values).

If I were you I'd lower the first speed treshold to 10kph (for e.g.) instead of 28kph and choose a more realistic/suitable rev treshold (e.g. 2500 or 3000 rpm). That way when standing still you'll be able to stump the gas pedal with the rpm's not exceeding the chosen limit (see e.g. above). After that choose the same speed/rpm tresholds as stock so that the car will actually be able to move :lol:

Upon releasing the clutch and as soon as the first speed limit is exceeded the limiter will go back to normal and you'll be able to rev freely to the redline.

Again, I haven't tried it myself and those steps are only theoretical, but IMO they're closer to what you're looking for.

pazi88 · **Posted:** Wed Sep 11, 2019 3:58 pm

Problem in ms42 and ms43 is that the axis for rev limiter isn't really speed. It's gear. Like gears 1-3, gear 4 and gear 5. If I remember correctly. So try to do launch control with that

ms43 has code modification that allows real launch control based on clutch switch input. But not for ms42. At least in public.

Breeze1 · **Joined:** Mon Apr 16, 2018 9:28 am **Posts:** 243

pazi88 wrote:

Problem in ms42 and ms43 is that the axis for rev limiter isn't really speed. It's gear. Like gears 1-3, gear 4 and gear 5. If I remember correctly. So try to do launch control with that

ms43 has code modification that allows real launch control based on clutch switch input. But not for ms42. At least in public.

So the above reasoning would still apply, but with "28kph" actually meaning 1st, the speed axis wouldn't need to be modified, only the rpm value for that "speed", right?

If that applies, I'm still not comfortable with the fact that the car wouldn't be able to go higher than the given rpm treshold when in 1st gear. I'm thinking about emergency situations where one would have to "escape" an incoming danger. If I remember well in 1st you can reach as high as 60kph @ max rpm, which could be necessary in those situations.

Cloudforce · **Joined:** Wed Aug 27, 2014 11:57 am **Posts:** 259

The code between MS42 and MS43 is quite similar, we may be able to convert MS42 to the similar style like MS43.

Aldoske · **Joined:** Mon Sep 02, 2019 6:50 pm **Posts:** 5

The rev limiter only works for dofferent gears and they are mapped from the roght to left (5th 4th and 1-3rd) Ive set rev limiter but it works not only on first but in second and thirt, are there any chances to set it only to 1st gear?

Nedim · **Joined:** Sat Jun 29, 2019 2:08 pm **Posts:** 86

Breeze1 wrote:

I haven't tried it myself, but following your logic and the tables shown, if you want launch control you want the revs to be limited to a certain treshold determined by yourself (e.g. 3000rpm) while the vehicle is standing still.

In your tables, when the vehicle's speed is anything less than 28kph the revs are limited to 6880rpm, or in another words, NOT limited. And at higher vehicle speeds, limited to respectively 448 and 512 rpm, which doesn't make sense (those are not even idle values).

If I were you I'd lower the first speed treshold to 10kph (for e.g.) instead of 28kph and choose a more realistic/suitable rev treshold (e.g. 2500 or 3000 rpm). That way when standing still you'll be able to stump the gas pedal with the rpm's not exceeding the chosen limit (see e.g. above). After that choose the same speed/rpm tresholds as stock so that the car will actually be able to move :lol:

Upon releasing the clutch and as soon as the first speed limit is exceeded the limiter will go back to normal and you'll be able to rev freely to the redline.

Again, I haven't tried it myself and those steps are only theoretical, but IMO they're closer to what you're looking for.

does anyone have tried this? It is making sense. Maybe Will work

Richard · **Posted:** Sun Oct 06, 2019 7:36 am

Nedim wrote:

Breeze1 wrote:

I haven't tried it myself, but following your logic and the tables shown, if you want launch control you want the revs to be limited to a certain treshold determined by yourself (e.g. 3000rpm) while the vehicle is standing still.

In your tables, when the vehicle's speed is anything less than 28kph the revs are limited to 6880rpm, or in another words, NOT limited. And at higher vehicle speeds, limited to respectively 448 and 512 rpm, which doesn't make sense (those are not even idle values).

If I were you I'd lower the first speed treshold to 10kph (for e.g.) instead of 28kph and choose a more realistic/suitable rev treshold (e.g. 2500 or 3000 rpm). That way when standing still you'll be able to stump the gas pedal with the rpm's not exceeding the chosen limit (see e.g. above). After that choose the same speed/rpm tresholds as stock so that the car will actually be able to move

Upon releasing the clutch and as soon as the first speed limit is exceeded the limiter will go back to normal and you'll be able to rev freely to the redline.

Again, I haven't tried it myself and those steps are only theoretical, but IMO they're closer to what you're looking for.

does anyone have tried this? It is making sense. Maybe Will work

No it doenst work

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ohnoozz · **Joined:** Sat Nov 02, 2019 10:27 pm **Posts:** 14

Pazi is right. It is perfectly possible with a MS42, it's just that the tables are giving incorrect values. From my memory it's gear 1-3, 4 and 5 as X-axis. The values are not RPM, it has to be a calculation with speed to come to the right RPM. But I have to look it up again, I documented it on my tuning laptop.

I promised to make a video around it, haven't had the time to do it. Will try today to solve all the new threads in this forum

Proof with my car:
https://www.youtube.com/watch?v=KhQJTxr_hP4

ohnoozz · **Joined:** Sat Nov 02, 2019 10:27 pm **Posts:** 14

I created a new topic for it to not bury it in another thread. This should give you the answer:

viewtopic.php?f=59&t=17774

Pryzmont · **Joined:** Wed Jul 14, 2021 12:43 am **Posts:** 1

Hi!

I did a working launch control. The third table is responsible for 1 gear.
We change the value at the top to 500, and in the value we enter the RPM
at which the launch control is to block.

Sorry for English, greetings from Poland !.
MS42
M52B28

RomRaider

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