Connection of dual VR

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Connection of dual VR

Postby Dutchman » Sun Jul 18, 2010 1:14 pm

Hello Jean,

I want to use the dual VR conditioner with my own homebrew mainboard. Do i have to use the optocoupler pin 6 or can i directly connect to the CPU like the secondary input?

Grtz,

Alex
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Re: Connection of dual VR

Postby jbelanger » Sun Jul 18, 2010 1:38 pm

The output is a 0-5V digital signal so you can connect it directly to the CPU.

Jean
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Re: Connection of dual VR

Postby Dutchman » Fri Jul 23, 2010 7:53 am

Thanks!

Alex
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Re: Connection of dual VR

Postby Dutchman » Fri Jul 30, 2010 12:51 am

Don't know where to post this.
I did succesfully instal a VR cam sensor on my mercedes 117 engine cam but positioning is a pain i the ass. It has also a 36-1 crankwheel.
Is it possible to use the cil 1 ignition lead in the same way as a timing light as cam signal?
Or will i getting trouble with the changing timing of the ignition?

Alex.
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Re: Connection of dual VR

Postby jbelanger » Fri Jul 30, 2010 1:01 am

You cannot use the ignition signal to control the ignition. It's a chicken and egg thing.

The only way this would work is if you were using a distributor for the ignition and needed the cylinder one signal to do sequential injection. If you want to control ignition you need an independent signal. You can't use one of the outputs as one of the inputs to control that same output.

Jean
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Re: Connection of dual VR

Postby Dutchman » Fri Jul 30, 2010 7:05 am

I am using it for fuel only LPG injection for a car of a friend. my car has a cam sensor installed but that's not easy plumbing.
That's wy i am curious if its a problem that the "cam" signal is traveling with the advance of the ignition to get the ms3 to do full sequential triggering.

Alex.
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Re: Connection of dual VR

Postby jbelanger » Fri Jul 30, 2010 9:13 am

With a 36-1 wheel, the cam sensor position is not critical. It simply has to always be before the missing tooth for cylinder 1 (or what the MS considers to be cylinder 1). If it moves by a few crank teeth but stays in the same relative position then it will be fine. If it moves in the missing tooth range or crosses it then it won't work.

Jean
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