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No fire, crank trigger, grid, pro mag #2302011
05/09/17 10:05 PM
05/09/17 10:05 PM
Joined: Jan 2015
Posts: 493
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590 Challenger Offline OP
mopar
590 Challenger  Offline OP
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Joined: Jan 2015
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My car fires right up when triggered from the mag. Plugging in the new crank trigger with the grid, she doesn't want to fire. I have been told I need more RPM's in cranking when firing a mag with a crank trigger and to switch it to 24v cranking. Sounds like it's cranking quite fast now, Grid displays 145-155 cranking RPM on 12V.
Is anyone firing a ProMAg from a crank trigger 12V? Or how fast does yours need to spin to start?

Re: No fire, crank trigger, grid, pro mag [Re: 590 Challenger] #2302123
05/10/17 12:23 AM
05/10/17 12:23 AM
Joined: Aug 2003
Posts: 43,218
Bend,OR USA
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Cab_Burge Offline
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Bend,OR USA
Call MSD scope I'm assuming your bypassing the magneto so it is completely out of the ignition circuit except for distributing spark Via the rotor, yes or no?


Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
Re: No fire, crank trigger, grid, pro mag [Re: 590 Challenger] #2302235
05/10/17 08:41 AM
05/10/17 08:41 AM
Joined: Jan 2015
Posts: 493
Parts unknown
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590 Challenger Offline OP
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When I bypass it as you say to the crank trigger nothing happens. If I let the mag trigger it it runs fine.

Re: No fire, crank trigger, grid, pro mag [Re: 590 Challenger] #2302428
05/10/17 03:19 PM
05/10/17 03:19 PM
Joined: Jan 2008
Posts: 2,363
Cotati, CA
Dave Hall Offline
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Cotati, CA
I talked to Jesse Adams and he said that you do indeed need to run the starter at 24 volts to get it to fire on the crank trigger. I think Meziere, CSR or MSD sells a solenoid for the starter. Jesse had the same problem on his door car and like you just bypassed the crank trigger. He did say the timing is way more deadly on the crank trigger and 24v starter is the way to go.

Re: No fire, crank trigger, grid, pro mag [Re: 590 Challenger] #2302503
05/10/17 05:50 PM
05/10/17 05:50 PM
Joined: Jan 2015
Posts: 493
Parts unknown
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590 Challenger Offline OP
mopar
590 Challenger  Offline OP
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Joined: Jan 2015
Posts: 493
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Thanks Dave, I can fire the solenoid on 12v and feed 24 to the starter, race is Friday, that's next weeks project now

Re: No fire, crank trigger, grid, pro mag [Re: 590 Challenger] #2302530
05/10/17 06:20 PM
05/10/17 06:20 PM
Joined: Jan 2003
Posts: 2,299
NE Ohio
DoubleD Offline
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NE Ohio
crank triggers wear out over time- is a new one or older one?

Re: No fire, crank trigger, grid, pro mag [Re: 590 Challenger] #2302555
05/10/17 07:20 PM
05/10/17 07:20 PM
Joined: Jan 2015
Posts: 493
Parts unknown
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590 Challenger Offline OP
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590 Challenger  Offline OP
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Brand New

Re: No fire, crank trigger, grid, pro mag [Re: 590 Challenger] #2302890
05/11/17 03:57 PM
05/11/17 03:57 PM
Joined: Oct 2007
Posts: 422
Columbus, OH
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Ben Holt Offline
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Columbus, OH
Electrimotion makes a switch so that you can change the inputs. You can start it on the mag, then once it's running you can switch it over to the grid. I usually likes to have the timing really low, like 15-20 so that it can start really easy, then have the Grid have the correct timing, like 28 or so, depending on the combo. Then the Grid can control all the down track stuff

And 16v should be able to spin it up no problem. But I would definitely install the switch

Last edited by Ben Holt; 05/11/17 03:58 PM.
Re: No fire, crank trigger, grid, pro mag [Re: 590 Challenger] #2302972
05/11/17 07:16 PM
05/11/17 07:16 PM
Joined: Jan 2015
Posts: 493
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590 Challenger Offline OP
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590 Challenger  Offline OP
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Thanks for your input, Someone else mentioned using a switch to flip it over after running but said they have had the switches fail

Re: No fire, crank trigger, grid, pro mag [Re: 590 Challenger] #2303007
05/11/17 08:28 PM
05/11/17 08:28 PM
Joined: Oct 2007
Posts: 422
Columbus, OH
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Ben Holt Offline
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Columbus, OH
Every blower car I have been around has one, and I have never, personally, seen one fail. Not that it can't or won't happen! But that is why you set the timing on the mag low. If the switch does die and you can only run the mag, the timing will be low enough that you probably be able to go up and down the track. Maybe not as quick as you would like, but you can make a hit and come back and fix it. I would rather have the switch, and the chance of it failing, than have it 24v. It's a complete pain to wire a car up both ways, with 24v and 12v.

Re: No fire, crank trigger, grid, pro mag [Re: 590 Challenger] #2303049
05/11/17 09:51 PM
05/11/17 09:51 PM
Joined: Sep 2014
Posts: 4,457
Washington
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madscientist Offline
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Washington
I started all my mag engines off 24 volts. I don't fully understand what you are doing but doing a 24 starting system is easy with a series/parallel switch. It doesn't require much more wiring and it will start on 24 volts and run everything else on 12 volt.


Just because you think it won't make it true. Horsepower is KING. To dispute this is stupid. C. Alston
Re: No fire, crank trigger, grid, pro mag [Re: Ben Holt] #2303108
05/11/17 11:25 PM
05/11/17 11:25 PM
Joined: Jan 2015
Posts: 493
Parts unknown
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590 Challenger Offline OP
mopar
590 Challenger  Offline OP
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Joined: Jan 2015
Posts: 493
Parts unknown
Originally Posted By Ben Holt
Every blower car I have been around has one, and I have never, personally, seen one fail. Not that it can't or won't happen! But that is why you set the timing on the mag low. If the switch does die and you can only run the mag, the timing will be low enough that you probably be able to go up and down the track. Maybe not as quick as you would like, but you can make a hit and come back and fix it. I would rather have the switch, and the chance of it failing, than have it 24v. It's a complete pain to wire a car up both ways, with 24v and 12v.

Thank you, sounds like a great idea. I ran it off the mag last year, it runs fine but the timing bounces a lot. Trigger made it run dead on. The trigger will fire it at 15 degrees and run but not at 21 where I need it to be??????

Re: No fire, crank trigger, grid, pro mag [Re: madscientist] #2303112
05/11/17 11:30 PM
05/11/17 11:30 PM
Joined: Jan 2015
Posts: 493
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590 Challenger Offline OP
mopar
590 Challenger  Offline OP
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Joined: Jan 2015
Posts: 493
Parts unknown
Originally Posted By madscientist
I started all my mag engines off 24 volts. I don't fully understand what you are doing but doing a 24 starting system is easy with a series/parallel switch. It doesn't require much more wiring and it will start on 24 volts and run everything else on 12 volt.

I have a few old (new) series parallel switches at work on the shelf but I really don't think this would need one. I'm pretty sure I can ground one side of battery "a" and run a tap off the other side to run all 12V items, series battery "B" to it and run a tap off the other side to power 24V to the main power stud on the starter.
Series parallel would be handy to charge the batteries but I have no alternator

Re: No fire, crank trigger, grid, pro mag [Re: 590 Challenger] #2303128
05/11/17 11:51 PM
05/11/17 11:51 PM
Joined: Sep 2014
Posts: 4,457
Washington
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madscientist Offline
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madscientist  Offline
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Joined: Sep 2014
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Washington
Originally Posted By 590 Challenger
Originally Posted By madscientist
I started all my mag engines off 24 volts. I don't fully understand what you are doing but doing a 24 starting system is easy with a series/parallel switch. It doesn't require much more wiring and it will start on 24 volts and run everything else on 12 volt.

I have a few old (new) series parallel switches at work on the shelf but I really don't think this would need one. I'm pretty sure I can ground one side of battery "a" and run a tap off the other side to run all 12V items, series battery "B" to it and run a tap off the other side to power 24V to the main power stud on the starter.
Series parallel would be handy to charge the batteries but I have no alternator



Send me a PM if you want to sell one of those switches and what you want for it.


Just because you think it won't make it true. Horsepower is KING. To dispute this is stupid. C. Alston
Re: No fire, crank trigger, grid, pro mag [Re: 590 Challenger] #2303386
05/12/17 03:27 PM
05/12/17 03:27 PM
Joined: Oct 2004
Posts: 8,165
Left Coast
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BobR Offline
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Left Coast
Try checking the rotor phase. I'd bet that's it.

Re: No fire, crank trigger, grid, pro mag [Re: 590 Challenger] #2304240
05/14/17 11:33 AM
05/14/17 11:33 AM
Joined: Jan 2015
Posts: 493
Parts unknown
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590 Challenger Offline OP
mopar
590 Challenger  Offline OP
mopar
5

Joined: Jan 2015
Posts: 493
Parts unknown
Did recheck and phase it, I guess I have other electrical issues to track down too







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