[biggermens]

Hello everyone

I am looking to see if anyone can give me some advise i am trying to make a program to run a snowmobile motor
i have my hard were all working that is not a problem
What i have is one pickup ( trigger ) at Top Dead Center so when the motor hits Top Dead Center 0 degrease PC will send a spark
That is working. But what i want to do is be able to chance the trimming of the spark in degrease in my software
For example at 20 degrease of the crank shaft the spark will fire but the trigger is at 0 degrease

That i am not sure how to do If anyone would have a idea can you let me know please.


Thanks.
Biggs

[trevster344]

What you're talking about is tuning a snowmobile motor, that's pretty cool but it all comes down to the computer that the snow mobile is using, if there is no computer then it's mechanical tuning, but that's old school. So tell me what kind of computer is it that you are trying to tune?

If it's anything like tuning a car, creating your own tuning software for a computer isn't a beginners job. Most tuners are designed to work with custom computers. It's also not just a matter of creating some software to change a few things around, it's a matter of understanding the mechanics of the motor. There is probably a wiring harness for the motor as well which ties all the sensors for the oxygen, fuel, etc into the computer. Then you'll have to figure out how to interpret the data the sensors send back, also how you'll tell the computer to adjust. I'm not to sure what tuning software has ever been created from VB.Net for cars, or snow mobiles for that matter, but I'm sure it's possible. I don't know where you would start with this, you might seek some guidance from some professional tuners, but I also wouldn't get your hopes up. Most tuners won't tell ya much, they just want to keep it all a secret.

This post has been edited by trevster344: 01 February 2012 - 10:15 PM

[biggermens]

The motor is a old from a 71 skidoo TNT hehe
It had a points ignition setup and it old school and its not very good anymore
I am not going to run any kind of fuel management, I have to use a carburetor.
In my head what i want to do is pretty easy, but i just don't know, the hardware is working
no problem all i have in my program is one " if trigger = true then fire spark "
That will fire a spark at 0 degrees I want to be able to chance it, for example have it fire at 20 degrees
I have tried a timer but as soon the RPM go up it will not work

If it will help i can draw a picture.

Thanks
Biggs

Oh and i have access to a dyno and i have my own secrets up my sleeve hehehe

Biggs

[trevster344]

Your tuning will lay in the carbeurator and the various circuits because fuel flows according to the levels of air. I could be wrong but you need a computer to use software to tune without going old school mechanical tuning and you'll need sensors for oxygen and fuel to control the amounts required to keep it from being too lean or too rich of fuel. I'm unsure of how you'll achieve this with .net though sir, you'll definitely need a computer with the .net framework, or you can try using a language that is not dependent on these factors and create your own classes to manage your tuning in the computer. I'll do some more digging I happen to have grown up around big power, tuning, and racing, and also have access to a dyno. I'm greatly intrigued by your project though and hope to bring you some better information soon. Until then sir good luck.

Edit: misread a lot what kind of hardware are you using and what code do you have so far? Also I would not recommend tuning for anymore power if that's your goal with a points ignition system cause as heat builds and the engine speed gets up there your sparks will begin to miss a lot more often and that'll just defeat your purpose of performance.

This post has been edited by trevster344: 03 February 2012 - 09:01 PM

[biggermens]

In a carburetor it is all mechanical , you adjust your air fuel all with the carburetor on a 2 stroke motor you cannot run a O2 sensor the un burnt oil from the oil gas mix will destroy it .
What i have to run this is an old asus ezpc and I will run windows xp embedded, and i will have that fix on to the snowmobile, with my program running my ignition system what i have right now is very simple
If input 1 = true then output 1 = True
Input one is the trigger from the crankshaft and output 1 go to the coil that sends the spark.
A points system from the 70’s uses a mechanical advance setup the more rpm the more advance the timing, that is what i am trying to do with my software.

Thanks
Biggs

[trevster344]

Exactly what I thought and excellent sounds like you're on the right track. Well there must be a mathematical calculation you can use.

[macosxnerd101]

Moved to VB.NET. Please don't post help questions in the lounge.

[AdamSpeight2008]

Moved to lounge, cos it ain't a help question, discussion topic.
It just random drivel about engiges not vb.
So it is topic worthy being used a bone in the Caffeine Lounge.

This post has been edited by AdamSpeight2008: 04 February 2012 - 01:21 PM

[gabehabe]

Wouldn't somewhere like Software Development be more suitable? The lounge is meant for completely off-topic stuffs.

Spoiler

I just want to see if I can get it moved again

[stayscrisp]

Moved to Software Development