I am in need of a circuit that will boost the output of the kill wire on a Vertex magneto. when the mag gets hot (engine block temp) it quits triggering the opto-isolater. It worked while the engine was in the open air but when the body was installed and I was able to drive the car three years ago, this problem came up so I had to change to a modified Accel distributor.
This is MS v3.000 and v2.2 board. Also this is the '57 Corvette chassis I brought to the first MegaSquirt meeting at Kensington Park in Michigan.
Vertex Magneto.
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Read the manual to see if your question is answered there before posting. Many users will not reply if the answer is already available in the manual.
If your question is about troubleshooting, configuration, or tuning, you MUST include your processor type (MS-I or MS-II) and code version in your post. If your question is about PCB assembly or modifications, you must also include the main board version number (1.01, 2.2 or 3.0). For tuning/troubleshooting questions, please attached a datalog and your MSQ file to your post.
If you have questions about MS1/Extra or MS2/Extra code configuration or tuning, please post them at www.msextra.com Such questions posted here will be moved to: a temporary MSextra sub-forum, where they will be removed after 7 days
The full forum rules are here: Forum Rules, be sure to read them all regularly.
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Matt Cramer
- Super Squirter
- Posts: 2951
- Joined: Sat Jul 03, 2004 11:35 am
Re: Vertex Magneto.
Is there a tach adapter available for this?
Re: Vertex Magneto.
I don't think there is because I always got the tach signal from the same wire when I was using carbs but I did not use a tach and the MegaSquirt at the same time. I have not seen an optional device for a Vertex other than a relay that grounds it with the ignition switch. I was looking at using an HEI 990 firing module but nothing comes to mind.
Dennis
Dennis
Re: Vertex Magneto.
Matt,
Did I miss understand your question about a tach adapter?
Dennis
Did I miss understand your question about a tach adapter?
Dennis
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Matt Cramer
- Super Squirter
- Posts: 2951
- Joined: Sat Jul 03, 2004 11:35 am
Re: Vertex Magneto.
I was thinking of using one of these:
http://www.autometer.com/cat_accessorie ... spx?vid=98
Do you have any information on what the signal on that wire looks like? Is it a square wave, voltage spikes off the coil, or what?
http://www.autometer.com/cat_accessorie ... spx?vid=98
Do you have any information on what the signal on that wire looks like? Is it a square wave, voltage spikes off the coil, or what?
Re: Vertex Magneto.
My mag is one piece (no external coil), so that module won't work according to autometer and a couple of forums I checked. I do know that terminal can bite if you touch it. I'll set the mag up on the bench and run it with a drill motor and see if I can get a volt reading and, I hope an o-scope pattern. Not experienced in using an o-scope. I can find no specs on this magneto on the web.
Thanks.
Thanks.
Re: Vertex Magneto.
This what I did. I set the magneto up on my distributor machine and tested it for DC volts and AC volts. Ran the mag slow to simulate cranking and got .002 to ~1.15 erratic volts DC. as I sped the mag up, the voltage hung in at around .07 volts DC. The AC numbers were - slow ~3.5 volts AC and as I sped the mag up, the volts climbed to 17 AC. I also tested the Ohms at the kill terminal and the case and got 0.7 with points open and 0.3 points closed. I took a video of the O-scope pattern but this site won't let me send it or I don't know how to send it.
Re: Vertex Magneto.
How do I upload a video? I'm going to try again. Nope, it won't do it. Says "connecting" for a while then I get a new "post a reply" page. It's a ".mov file.
Re: Vertex Magneto.
.mov files are not an allowed attachment type. Easiest way to attach would to link a file from youtube or a photo site.
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Re: Vertex Magneto.
Thanks Kholman. I hope I do this right. http://www.youtube.com/watch?v=OLWw4sO5Omo It works! That was interesting. I learned something new! This, I hope, will get some one interested in what I'm up to with this car. Thanks again for the education!