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ballast resistor by-pass?? #1046598
08/03/11 01:31 PM
08/03/11 01:31 PM
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540challenger Offline OP
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Would it be ok to bypass my 4 pin ballast and just run a coil made for a constant 12v?? As far as i know it should be no problem but i just want to double check. I am also running a chrome box if that makes a difference.


Thanks

Re: ballast resistor by-pass?? [Re: 540challenger] #1046599
08/03/11 01:54 PM
08/03/11 01:54 PM
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MoparforLife Offline
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Mopar recommends running the ballast resister but I know guys that have done as you said with no adverse effects although they usually were not run for long periods when run.

Re: ballast resistor by-pass?? [Re: MoparforLife] #1046600
08/03/11 01:56 PM
08/03/11 01:56 PM
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Valencia, España
NachoRT74 Offline
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Quote:

Mopar recommends running the ballast resister but I know guys that have done as you said with no adverse effects although they usually were not run for long periods when run.






Ballast resistor bypass will work for an emergency but not for regular use.

Multi spark systems can live without ballast because coils are feeded just when triggered, but on regular ignition systems they are constantly positive feeded from ign switch.


With a Charger born in Chrysler assembly plant in Valencia, Venezuela
Re: ballast resistor by-pass?? [Re: 540challenger] #1046601
08/03/11 02:18 PM
08/03/11 02:18 PM
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540challenger Offline OP
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Thanks guys looks like the ballast will stay.

Re: ballast resistor by-pass?? [Re: 540challenger] #1046602
08/03/11 03:58 PM
08/03/11 03:58 PM
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Florida
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scratchnfotraction Offline
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I by-pass mine with the pertronix points conversion and their flame thrower coil,it has its own resister built in to it

the pertronix conversion needs the full 12 volts to work correctly.

been like that for 15+ yrs now


Re: ballast resistor by-pass?? [Re: scratchnfotraction] #1046603
08/03/11 04:22 PM
08/03/11 04:22 PM
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mi
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ERAT340 Offline
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How about MSD Blaster II epoxy filled?

Re: ballast resistor by-pass?? [Re: scratchnfotraction] #1046604
08/03/11 04:23 PM
08/03/11 04:23 PM
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540challenger Offline OP
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Quote:

I by-pass mine with the pertronix points conversion and their flame thrower coil,it has its own resister built in to it

the pertronix conversion needs the full 12 volts to work correctly.

been like that for 15+ yrs now






That would of been a good way to go however I have moper performance dist. does pertronix work with a mopar dist??????

Re: ballast resistor by-pass?? [Re: 540challenger] #1046605
08/03/11 04:33 PM
08/03/11 04:33 PM
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Florida
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scratchnfotraction Offline
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I ditch the stock elect mopar dist and grabed a reman unit from auto zone for 30 bux,then used the conversion kit with the coil.

the coil will work with the MP dist & ecu

Re: ballast resistor by-pass?? [Re: scratchnfotraction] #1046606
08/03/11 05:48 PM
08/03/11 05:48 PM
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SomeCarGuy Offline
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I bypassed mine w/ a MSD Blaster 2 and it ran great. Some say it will kill the ECU. I ran mine for hours on end, car running 195 temp constantly, on 90 degree + days with zero issues.

ECU was flush mounted on the firewall. If it was going to overheat and burn up like is claimed, that would have done it. Just a parts store brand ECU, nothing special.

IMO the system worked a little better. A 12 volt coil will like having 12 volts.


I want my fair share
Re: ballast resistor by-pass?? [Re: SomeCarGuy] #1046607
08/03/11 06:12 PM
08/03/11 06:12 PM
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bethlehem pa
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mikemee1331 Offline
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Quote:

I bypassed mine w/ a MSD Blaster 2 and it ran great. Some say it will kill the ECU. I ran mine for hours on end, car running 195 temp constantly, on 90 degree + days with zero issues.



actually it's not 'some' who say you need it, it's Mother Mopar.

Re: ballast resistor by-pass?? [Re: mikemee1331] #1046608
08/03/11 06:22 PM
08/03/11 06:22 PM
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Under My Car
Mopar_Country Offline
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You can eliminate the ballast if you have a coil with one built in.

Re: ballast resistor by-pass?? [Re: mikemee1331] #1046609
08/04/11 01:26 AM
08/04/11 01:26 AM
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SomeCarGuy Offline
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Quote:

Quote:

I bypassed mine w/ a MSD Blaster 2 and it ran great. Some say it will kill the ECU. I ran mine for hours on end, car running 195 temp constantly, on 90 degree + days with zero issues.



actually it's not 'some' who say you need it, it's Mother Mopar.




"they" also tell you to run their junky Purpleshaft cams, junky Stage 6 heads and so on.

If that were going to kill the box, I would have been on foot. Run yours w/ the ballast if you like.

Re: ballast resistor by-pass?? [Re: SomeCarGuy] #1046610
08/04/11 01:30 AM
08/04/11 01:30 AM
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So Cal
Sinitro Offline
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Quote:

I bypassed mine w/ a MSD Blaster 2 and it ran great. Some say it will kill the ECU. I ran mine for hours on end, car running 195 temp constantly, on 90 degree + days with zero issues.

ECU was flush mounted on the firewall. If it was going to overheat and burn up like is claimed, that would have done it. Just a parts store brand ECU, nothing special.

IMO the system worked a little better. A 12 volt coil will like having 12 volts.




The Blaster II coil should use a 0.25 Ohm ballast resistor with the Mopar chrome box..

Just my $0.02...

Re: ballast resistor by-pass?? [Re: Sinitro] #1046611
08/04/11 02:04 AM
08/04/11 02:04 AM
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SomeCarGuy Offline
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Somebody should do a test and see how long it takes to burn an ECU up. I haven't ever seen a temp given for the amount of heat that no ballast will generate in the ECU. It must not be as much as is believed as 1000's of miles didn't make a difference for my car.

Re: ballast resistor by-pass?? [Re: SomeCarGuy] #1046612
08/04/11 07:49 AM
08/04/11 07:49 AM
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Indiana
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YO7_A66 Online content
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Years ago, I bought one of the first FBO ignition systems. Last year I removed the ballast and the FBO coil and replaced the coil with a Mallory unit that did not require a ballast. The system seems to be running fine but I emailed FBO about their new box and D said that my existing FBO ECU will burn up without a ballast. I have been running it for about six months or so but I do not put allot of miles on the car. I assume that I am going to see problems so I am thinking of buying the new FBO ECU and coil that does not require a ballast. When I removed the ballast and coil, I cutout the back of the ECU bracket to allow it to cool down just in the case that it creates more heat without the ballast.


I would like to see proof of the temps on an ECU with or without a ballast too.

6762387-cutout.jpg (365 downloads)

1970 YO7 A66 [Canadian Export] F8 Challenger
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Re: ballast resistor by-pass?? [Re: YO7_A66] #1046613
08/04/11 09:35 AM
08/04/11 09:35 AM
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Upper Midwest
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Many coils are internally resisted and there fore an external ballast is not required.

Re: ballast resistor by-pass?? [Re: MoparforLife] #1046614
08/05/11 02:46 PM
08/05/11 02:46 PM
Joined: Jan 2003
Posts: 3,575
The Netherlands
BigBlockMopar Offline
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I'm running a stock (Heavy Duty 12v) coil in my daily '73 Dart without ballast resistor.
If I reconnect the ballast resistor, the car starts to stumble at idle and die when put in Drive. I probably have the wrong resistor, but since I disconnected it everything still seems to work fine.
The coil's temp climbs right along with the engine intake's temp.

Today I decided to install a MSD Blaster 2 coil (also without ballast).
After starting the engine I let it run for a couple of minutes and used my infrared tempgauge and pointed it at the coil... It was already at 130-140F and climbing. I kept the engine idling for awhile to see where the temp would end up at and it went up to around 176F when I called it quits.

To me it's obvious the Blaster coil really needs a ballast resistor when used in a daily driver.


Has anyone ever measured the temp of a coil here?

Re: ballast resistor by-pass?? [Re: BigBlockMopar] #1046615
08/05/11 04:06 PM
08/05/11 04:06 PM
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NY usa
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540challenger Offline OP
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Quote:

I'm running a stock (Heavy Duty 12v) coil in my daily '73 Dart without ballast resistor.
If I reconnect the ballast resistor, the car starts to stumble at idle and die when put in Drive. I probably have the wrong resistor, but since I disconnected it everything still seems to work fine.
The coil's temp climbs right along with the engine intake's temp.

Today I decided to install a MSD Blaster 2 coil (also without ballast).
After starting the engine I let it run for a couple of minutes and used my infrared tempgauge and pointed it at the coil... It was already at 130-140F and climbing. I kept the engine idling for awhile to see where the temp would end up at and it went up to around 176F when I called it quits.

To me it's obvious the Blaster coil really needs a ballast resistor when used in a daily driver.


Has anyone ever measured the temp of a coil here?




I haven't but tomorrow I will, sounds like a fun and easy experiment.

Re: ballast resistor by-pass?? [Re: 540challenger] #1046616
08/05/11 06:31 PM
08/05/11 06:31 PM
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bethlehem pa
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mikemee1331 Offline
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i believe the Blaster 2 coil is rated at 45,000 volts. your stock 'heavy duty' is considerably less which would explain the amount of heat generated - more windings.

Re: ballast resistor by-pass?? [Re: mikemee1331] #1046617
08/06/11 12:31 AM
08/06/11 12:31 AM
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So Cal
Sinitro Offline
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Quote:

i believe the Blaster 2 coil is rated at 45,000 volts. your stock 'heavy duty' is considerably less which would explain the amount of heat generated - more windings.




Ding Ding..
We have a winner...
The later coils such as the Blaster 2 are capable of handling higher input voltages & current for a longer time..

Just my $0.02....

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