Cam phase sensor
Turbo Mini Forums

Okay, I don't know if I'm typing in the wrong thing or what, but I'm having the damndest time finding a good build thread for the cam sensor for the sequential injection. Any help anyone?

-James

http://www.turbominis.co.uk/forums/index.php?p=vt&tid=228314

and page 4:

http://www.turbominis.co.uk/forums/index.p...id=249927&fr=75

Well linked by Rob....

Somewhere buried in another thread is a picture of my completed one but I can't find the thread so here's the piccy,



The only fundamental difference is Paul used a Hall switch and I used an opto switch.

Hall switches are probably more common in the auto industry nowadays, my choice of opto was (a) I've used them on other projects so am familiar with them and (b) it can easily be set up to work on the same 5V as TPS, MAT and IAT and I prefer not to have 12V signals going anywhere near the CPU (although in this case it isn't really an issue as it feeds through an opto-isolator inside the MS2 anyway).

Schrödinger's cat - so which one am I ???

Other brand cat food tins can be used if you can't get them in the states.

I'm about to embark on Version II of mine. It's going to be shorter and more compact, but still use the same sensor.

I'll update the build thread.

The original one has now done over a thousand miles.

Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
Stephen Hawking - "The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."

You could also do it like this:

Attachments:

675.34kb

Team www.sheepspeed.com Racing

Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
Stephen Hawking - "The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."

Neat, but if it is VR, you need to add some more circuitry to the MS2 (or another of Jean's boards) to accept a second VR input.

Schrödinger's cat - so which one am I ???

I like that.

If something is worth doing, it's worth doing half of.

So do I.

Just need to make a one tooth wheel to fit to the back of the cam sprocket.

Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
Stephen Hawking - "The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."

I've not seen the engine internally, I'm just wiring it up, so don't know whats inside, although I guess it's a toothed wheel with 1 tooth missing. It's running on a Omex ECU

Team www.sheepspeed.com Racing

If you usethe right type if sensor IE Vauxhaul, you can have either Hall or VR in the same packaging

Disc with a hole would be OK software wise, as long as the ECU sees a change of state every two revs.

I'll dig out my vernier duplex later.

Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
Stephen Hawking - "The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."

Schrödinger's cat - so which one am I ???

Well, there are no screws on the back of my vernier duplex.

But it is a steel sprocket, so no reason why I cannot weld a tab of steel to it.

At that radius and weight, there would be no real need to worry about balance, although I could weld a weight on diametrically opposite.

Just need to work out if there is enough space behind the sprocket.

Good pointer there Jim.

Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
Stephen Hawking - "The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."

As far as I was aware hall sensors used on ECU systems in vehicles are 5v much the same as the TPS

The VEMS uses hall or VR primary or secondary and the Hall is 5v

I have not seen many 12v hall, but I could be wrong.

The sensor that I use is a 12v unit, but goes through an Opto-isolator on the ECU board.

Saves having to bring 5v out of the ECU.

Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
Stephen Hawking - "The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."

the hall sensors I use are 5 - 15v ideal!

Team www.sheepspeed.com Racing

Schrödinger's cat - so which one am I ???

Very true.

I think that we had the same discussion last year.

I'm certainly going to try and lose the dizzy body method if I can.

Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
Stephen Hawking - "The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."

Schrödinger's cat - so which one am I ???

Let me say three things. First: Holy hell, I didn't think this thread would go from 1 to 21 posts in a day, I was just looking for the build link... Second: How's the dizzy done exactly? Looks to me like you're utilizing two new plates attached to the dizzy, one for mounting the optical sensor maybe...? And the second for closing it, obviously rotating on the spindle and passing over the op sensor to send the signal to ms. And third, has anyone looked into the cam sprocket sensor with any fervor? Doesn't look like it would be too hard to put a missing tooth wheel in there just like on the crank, only this one would obviously run a cam speed rather than crank speed.

That's something that would probably be easier to do engine out though I'm thinking. do able engine in, but it's a tight space and you'd have to get the clearances right. What's the benefits of using a hall sensor over optical? Just more common or is there more advantages than that?

Schrödinger's cat - so which one am I ???