Faria Tachometer
#3032842
04/12/22 10:18 AM
04/12/22 10:18 AM
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Joined: Jan 2003
Posts: 10,713 North Dakota
6PakBee
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Does anyone know if a Faria current triggered tach (tach wired in series with the coil on a point ignition) will work with the Chrysler electronic ignition?
"We live in a time when intelligent people are being silenced so that stupid people won't be offended".
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Re: Faria Tachometer
[Re: 6PakBee]
#3033019
04/12/22 09:32 PM
04/12/22 09:32 PM
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Joined: Jan 2003
Posts: 15,350 Omaha Ne
TJP
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Some info here LINKYmight try GOOGLING I do know that a commonly sold electronic ignition adapter for a Sun distributor machine is nothing more than an HEI module in an overpriced black box DAMHIK (butthurt)
Last edited by TJP; 04/12/22 09:38 PM.
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Re: Faria Tachometer
[Re: TJP]
#3033076
04/13/22 08:54 AM
04/13/22 08:54 AM
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Joined: Jan 2003
Posts: 10,713 North Dakota
6PakBee
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Some info here LINKYmight try GOOGLING I do know that a commonly sold electronic ignition adapter for a Sun distributor machine is nothing more than an HEI module in an overpriced black box DAMHIK (butthurt) Some info here? Let's see, MSD, HEI, Petronics Flame Thrower III & Igniter III....maybe I missed it but I didn't see anything about a Mopar electronic ignition on this AMC board..... and this is a Mopar board. But maybe I'd have better luck asking this question on an International Harvester forum. What do you think about that?
"We live in a time when intelligent people are being silenced so that stupid people won't be offended".
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Re: Faria Tachometer
[Re: 6PakBee]
#3033163
04/13/22 01:49 PM
04/13/22 01:49 PM
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Joined: Jan 2003
Posts: 15,350 Omaha Ne
TJP
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Some info here LINKYmight try GOOGLING I do know that a commonly sold electronic ignition adapter for a Sun distributor machine is nothing more than an HEI module in an overpriced black box DAMHIK (butthurt) Some info here? Let's see, MSD, HEI, Petronics Flame Thrower III & Igniter III....maybe I missed it but I didn't see anything about a Mopar electronic ignition on this AMC board..... and this is a Mopar board. But maybe I'd have better luck asking this question on an International Harvester forum. What do you think about that? OK, I'll refrain from trying to help you in the future What do YOU think about that ? BTW there was a bit of info in there that you blew right by
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Re: Faria Tachometer
[Re: TJP]
#3033441
04/14/22 09:29 AM
04/14/22 09:29 AM
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Joined: Jan 2003
Posts: 10,713 North Dakota
6PakBee
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Some info here LINKYmight try GOOGLING I do know that a commonly sold electronic ignition adapter for a Sun distributor machine is nothing more than an HEI module in an overpriced black box DAMHIK (butthurt) Some info here? Let's see, MSD, HEI, Petronics Flame Thrower III & Igniter III....maybe I missed it but I didn't see anything about a Mopar electronic ignition on this AMC board..... and this is a Mopar board. But maybe I'd have better luck asking this question on an International Harvester forum. What do you think about that? OK, I'll refrain from trying to help you in the future What do YOU think about that ? BTW there was a bit of info in there that you blew right by Knock yourself out. Being a smarta@@ with "might try GOOGLING" is help? With the kind of help you provided I am no further ahead than I was before you "helped". So please, carry on.
"We live in a time when intelligent people are being silenced so that stupid people won't be offended".
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Re: Faria Tachometer
[Re: TJP]
#3033513
04/14/22 12:46 PM
04/14/22 12:46 PM
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Joined: Jan 2003
Posts: 10,713 North Dakota
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Knock yourself out. Being a smarta@@ with "might try GOOGLING" is help? With the kind of help you provided I am no further ahead than I was before you "helped". So please, carry on. Wasn't tryin to be a smart --- but rather helpful. I don't have the time to do all the research required to solve your issue. But others have faced it and it appears solvable with effort and research. hence my comment on the sun adapter But your firing back in the manner you did really was uncalled for. Good luck with your dilemma Really? When someone sarcastically comments "might try GOOGLING", I'm supposed to just let that go? If you didn't know the answer to a question you have three choices 1) say nothing, 2) say you can't help, 3) relay what you do know about the subject that may be of value. But "might try GOOGLING", with Google in all caps, fits into none of the three.
"We live in a time when intelligent people are being silenced so that stupid people won't be offended".
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Re: Faria Tachometer
[Re: 6PakBee]
#3033672
04/14/22 10:04 PM
04/14/22 10:04 PM
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Joined: Jan 2003
Posts: 15,350 Omaha Ne
TJP
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Knock yourself out. Being a smarta@@ with "might try GOOGLING" is help? With the kind of help you provided I am no further ahead than I was before you "helped". So please, carry on. Wasn't tryin to be a smart --- but rather helpful. I don't have the time to do all the research required to solve your issue. But others have faced it and it appears solvable with effort and research. hence my comment on the sun adapter But your firing back in the manner you did really was uncalled for. Good luck with your dilemma Really? When someone sarcastically comments "might try GOOGLING", I'm supposed to just let that go? If you didn't know the answer to a question you have three choices 1) say nothing, 2) say you can't help, 3) relay what you do know about the subject that may be of value. But "might try GOOGLING", with Google in all caps, fits into none of the three. you seem to be fixed on the "might try GOOGLING" comment blowing by my #3 comments I do know that a commonly sold electronic ignition adapter for a Sun distributor machine is nothing more than an HEI module in an overpriced black box And the forum I directed you to did have commentary on the problem you'll likely be facing. I found that by GOOGLING Faria tachometers. It's simple and if you spent as much time GOOGLING the subjetc as you have trying to slam me on the GOOGLING comment you'd likely be further ahead. If you had said you needed further help understanding the electrical part I would've been more than happy to help, but that's not the case sorry you took it as offensive, your issues, not mine
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Re: Faria Tachometer
[Re: Moparite]
#3033733
04/15/22 08:35 AM
04/15/22 08:35 AM
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Joined: Jan 2003
Posts: 10,713 North Dakota
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I never heard of a "Faria Tachometer" so googled it. Then googled it for the wiring and found this. Looks like it should work and googling is not a bad thing but i would look up the manufactures info first. That's just me and my $.02 Thanks for some real help. The situation with current actuated tachs is that they depend on the current waveform through the primary lead to the coil. They have few active components in their circuitry, they are basically current transformers with an RC/zener circuit to clip and modify the output into an analog voltage that feeds the meter movement. I know what the waveform for a points ignition looks like but I cannot find what the waveform is for the supply to a Mopar electronic ignition. And I haven't found it after hours of GOOGLING it. The HEI adapter seems to be the best bet at this point.
"We live in a time when intelligent people are being silenced so that stupid people won't be offended".
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Re: Faria Tachometer
[Re: TC@HP2]
#3033921
04/15/22 07:52 PM
04/15/22 07:52 PM
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Joined: Jan 2003
Posts: 10,713 North Dakota
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Faria is commonly found in marine applications, but they make a lot of instruments for other stuff too.. They still exist and still make a crap load of dash gauges. They also offer a rebuild service to recondition older gauges. They have a whole link of technical tuff on their site, including phone numbers. https://fariabeede.com/2-pages/home.php Thank you.
"We live in a time when intelligent people are being silenced so that stupid people won't be offended".
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Re: Faria Tachometer
[Re: 6PakBee]
#3034040
04/16/22 08:24 AM
04/16/22 08:24 AM
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Joined: May 2019
Posts: 6,240 nowhere
Sniper
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Thanks for some real help. The situation with current actuated tachs is that they depend on the current waveform through the primary lead to the coil. They have few active components in their circuitry, they are basically current transformers with an RC/zener circuit to clip and modify the output into an analog voltage that feeds the meter movement. I know what the waveform for a points ignition looks like but I cannot find what the waveform is for the supply to a Mopar electronic ignition. And I haven't found it after hours of GOOGLING it. The HEI adapter seems to be the best bet at this point.
I googled it, well actually DDG. First link listed had your waeform. https://www.forabodiesonly.com/mopa...-pickup-polarity-and-rotor-phase.441771/Might try honing your googlefu. Phrase I used was "mopar electronic ignition waveform"
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Re: Faria Tachometer
[Re: Sniper]
#3034043
04/16/22 08:39 AM
04/16/22 08:39 AM
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Joined: Jan 2003
Posts: 10,713 North Dakota
6PakBee
OP
I Live Here
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OP
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Thanks for some real help. The situation with current actuated tachs is that they depend on the current waveform through the primary lead to the coil. They have few active components in their circuitry, they are basically current transformers with an RC/zener circuit to clip and modify the output into an analog voltage that feeds the meter movement. I know what the waveform for a points ignition looks like but I cannot find what the waveform is for the supply to a Mopar electronic ignition. And I haven't found it after hours of GOOGLING it. The HEI adapter seems to be the best bet at this point.
I googled it, well actually DDG. First link listed had your waeform. https://www.forabodiesonly.com/mopa...-pickup-polarity-and-rotor-phase.441771/Might try honing your googlefu. Phrase I used was "mopar electronic ignition waveform" I think at this point . Thanks for the help but I already found that. What that covers is the waveform from the distributor pickup, not the waveform in the coil circuit. So while it's interesting, it's not the answer. So I would prefer this thread end now. I'll figure something out.
"We live in a time when intelligent people are being silenced so that stupid people won't be offended".
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Re: Faria Tachometer
[Re: Mattax]
#3034313
04/17/22 08:29 AM
04/17/22 08:29 AM
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Joined: Jan 2003
Posts: 10,713 North Dakota
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Those are waveforms showing the secondary voltage.
Current for the tach will be on the coil's primary wiring. I beleive my description of the primary side waveform is essentially correct. Sorry, I missed your post, got lost in all the noise. Well, you can't hurt one of those tachs unless you pass full voltage to ground through it so if my project comes to pass I'll give it a whirl.
"We live in a time when intelligent people are being silenced so that stupid people won't be offended".
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Re: Faria Tachometer
[Re: Mattax]
#3034317
04/17/22 08:52 AM
04/17/22 08:52 AM
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Joined: May 2019
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Those are waveforms showing the secondary voltage.
Current for the tach will be on the coil's primary wiring. I beleive my description of the primary side waveform is essentially correct. Maybe the OP can google a cheap USB oscope and sort it out himself.
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Re: Faria Tachometer
[Re: Sniper]
#3034349
04/17/22 10:55 AM
04/17/22 10:55 AM
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Joined: Feb 2010
Posts: 1,645 Phila. Pa.
Mattax
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I'm not trained in this stuff, but the primary voltage numerically will depend on where its measured. On the positive side of the coil is going to be system voltage when the points are open. It will drop when the points close and current flows through the resistor. The resistance to flow causes the voltage drop. On the negative side of the coil, there is both the resistance of the ballast and the coil itself. It may not be ground votlage because of the condensor in a points system. With a transistorized system it may be ground. My understanding is that the voltage is also effected by the inductance in the coil, and the fact that the switching is not perfect. With points we use a capacitor (condensor) so see the effect of that as well. On this page there is a nice illustration of coil current superimposed on coil voltage. https://www.sw-em.com/Ignition_Additional.htmNotice the voltage steps while the current ramps and then becomes stable. I beleive that's the current that makes the tachometer needle move. The more frequently it occurs, the more the needle moves. There's more along these lines here https://www.picoauto.com/library/automotive-guided-tests/primary-voltage-vs-currentedit: here's a more detailed explanation that I found helpful. The tranformer does cause the primary side to somewhat reflect the secondary voltage changes. https://www.motor.com/wp-content/uploads/FireInTheHoleUnderstandingIgnitionWaveforms-May2005.pdf
Last edited by Mattax; 04/17/22 11:15 AM.
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Re: Faria Tachometer
[Re: Moparite]
#3034365
04/17/22 11:43 AM
04/17/22 11:43 AM
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Joined: May 2012
Posts: 1,821 South Bend
John Brown
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I never heard of a "Faria Tachometer" so googled it. Then googled it for the wiring and found this. Looks like it should work and googling is not a bad thing but i would look up the manufactures info first. That's just me and my $.02 I had Faria tachs on most of my cars back in the 60's. All the voltage for the coil passed through the tachometer. There was no separate signal feed to the tach like is shown on this diagram.
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