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Chippernut Forums > Shift Light v2.3
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I think we can add a rev limiter, Launch control and a Full throttle shifting function

posted Feb 23, 2016 17:38:38 by Cem Dogrular
Hello,
I think thease functions would be cool to add but because off lack of knowledge that I have for coding I cant make thease functions myself and need help from you.

I have a armtech speed shift that has all of these functions and it has the same inputs as the shift light v2 accept a clcuh pedal sensor for full throttle shifting. So why can't we add these futures?
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19 replies
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Cem Dogrular said Feb 23, 2016 18:18:33
Every info I have about this project I will upload to this link bellow:
https://www.dropbox.com/sh/5mtv5262m89vo1p/AABQhfScDvUx9_oJs7E9jCroa?dl=0

Before Superchips had a product that allowd people to adjust the ignition timing this way.(I have one of them if you need info about it.)
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Jonduino said Feb 23, 2016 18:54:18
That's a great idea! Although I think it might end up being a seperate unit - from my understanding, a rev-limiter and launch control would require at least ignition control. Probably even fuel injector control - which is not out of the realm of possibility (google 2JZduino), but adding this onto the shift-light may be out of the scope a bit at this point.

I'm trying to think of a way around this -- maybe by intercepting the throttle signal, sort of like a cruise-control?

Looks like the armtech speed shift unit has simplified ignition control for cutting ignition. But, a possible issue I see with this is a rich condition, in which the engine ECU is still spraying fuel, but the spark plugs aren't firing -- this is sort-of similar to what you see in launch control devices meant for turbos (except they retard the timing to a degree that fires when the exhaust ports are open, to really spool the turbo-up at the line). This makes a little nervous about cylinder wall washing if you flood the engine too much. I haven't had a lot of experience with this - so maybe you can weigh in?

In my mind, the safest would be injector control - but again, it's a can of worms I'm not quite prepared to venture into quite yet. I've done it before with the 2ZJduino unit I built, and the device did work, but it's quite complicated. I'd love to do it eventually.

My intended road-map for chippernut was to start with 'passive' devices like gauges that accept digital and analog signals for processing and logging. After the shift-light, I have plans to release various other analog gauges for boost, temperature, EGT, and other 'simple' signals - then get into OBD/CAN interfacing, signal spoofing, fly-by-wire cheat devices, and, possibly, piggy-back and stand-alone engine management. (You should see the cool setup I've got prototyping on my bench right now (but it's highly classified at-the-moment)). Honestly a lot of this will be dictated by demand though, so if enough people would have a use for an open-source ignition/injection controller for rev-limiting and launch-control, I'll be right there to develop it.

I appreciate your willingness to help - this whole site has been built on a simple idea improved by suggestions like this. I honestly wouldn't be were I am today without all the support and help I've received from visitors, builders, racers, tuners, and enthusiasts.

I'll keep an eye on your dropbox. If you come up with some ideas, I'd love to hear them. I will probably have some time this summer and fall to play around with this idea.

Thanks!!
- jon
[Last edited Feb 23, 2016 18:54:35]
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Jonduino said Feb 23, 2016 18:57:09
BTW -- looking at that unit you posted on dropbox, is that the armtech speed shift? Looks very simple -- I bet it would be pretty easy to make a unit that did exactly what this does. Can you gently peel the rubber coating off the microcontroller chip and see what's under there? I wonder if that's an amtel chip - though w/ that package it could be anything.
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Cem Dogrular said Feb 23, 2016 20:05:59
Hello,
The coating inside the armtech is on there good and I couldnt peel it of it is a hard material.

The launch control and the rev limiter project that I had is for my golf mk1 1981 and it has no ecu it has a distributor and a coil in that case this system will work flawless but in the newer cars the problem you mentiond would happen.

When you got time can you try to make a code that triggers a relay that I made the drawing named circuit for a rev limiter/launch control they work in preaty much the same way.

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Cem Dogrular said Feb 23, 2016 20:07:26
For older cars it's simple to add fetures with taht connection as such as the rev limiter, launc control and ignition timming adjuster.
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Jonduino said Feb 24, 2016 21:09:42
Too bad you can't peel that off -- I think it serves a dual purpose; heat/vibration resistance and intellectual property protection. :) I agree though, for older vehicles or engines with a simple ignition/fuel control, this is easily achievable. Yes - I will devote some time to this idea over the summer. Great suggestion!
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Cem Dogrular said Feb 27, 2016 17:20:37
Hello Jon,
I finally made codes for the rev limiter and the launch. Can you check them and if they are correct can you add it to ypur code. They are in my dropbox named rev_limit and launch_control.

Best Regards
Cem
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Jonduino said Feb 29, 2016 13:41:57
awesome!! Yes, I'll check those out this week. Thanks!
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Cem Dogrular said Mar 02, 2016 17:36:25
Hello Jon,
Any news / anything I can help??

Cem
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Cem Dogrular said Mar 02, 2016 18:22:58
Also I tried to make a code for flat shifting and its in my dropbox
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Jonduino said Mar 02, 2016 22:09:34
Hi Cem, No Unfortunately I haven't had any time to look at it yet - but it's on my to-do list. Sorry it's taking me so long. I'll look soon, I promise

- jon
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Cem Dogrular said Mar 08, 2016 17:00:17
Hello Jon,
Any news?
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Jonduino said Mar 08, 2016 17:29:21
Yes - I've reviewed the code and it's really got me thinking. I think the next iteration of the Shift-Light board, (call it v3.0) I'm going to put native control of external components (relays, switches, anything you want 0-12V), as dedicated outputs. That's a really great idea. That way, you could theoretically control anything based on the RPM, be it an external shift light, ignition (rev limit or launch control) or anything else. For the launch control, I'll have to add additional input ports for the switch, but I may be able to work within existing components - just adding new traces.

Really good ideas!

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Cem Dogrular said Mar 08, 2016 17:38:58
Hello,
You can just add 2 more buttons one for the cluch pedal and one for activation of the system. First you will press the activation buton and hold while holding press the cluch pedal than release the activation button. Than the system is on you can full throttle it but it wont go over the RPM you entered

Button: https://www.dropbox.com/s/7oa7ls7iacczhsm/circuit%20relay.PNG?dl=0

for the relay http://www.ebay.com/itm/141643222364?_trksid=p2057872.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT

It is actually realy easy to make this circuit and add it to the excisiting sytem aswell...
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Cem Dogrular said Mar 08, 2016 17:40:53
Also I found I superschips module that is for adjusting the timming (advance or retard) in my dads shop and he told me that it works great and in the past he used lots of those modules I don't know how it works but I can send you the photos of it and the software to program it...
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