The best way to get that number is with an oscilloscope.
Ballast Resistor question
- Wildergarten
- Sweptline.ORG Pioneer
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Re: Ballast Resistor question
'69 W200 (thumbnail)
'68 W200 (RIP)
'68 W200 383 NP435 3.53
'67 W200 383 NP435 4.10 w overload springs, Dana 60, PTO winch & flatbed dump, racks, crane, c-air (Max)
Mark Vande Pol
Wildergarten.org
'68 W200 (RIP)
'68 W200 383 NP435 3.53
'67 W200 383 NP435 4.10 w overload springs, Dana 60, PTO winch & flatbed dump, racks, crane, c-air (Max)
Mark Vande Pol
Wildergarten.org
- swptln
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Re: Ballast Resistor question
Well, if you do the math/Ohms Law. The FSM is wrong, there is no way your going to have a 3Amp load, with engine not running. That is a static load, so the math/Ohms Law works I=E/R. The running load is going to be different and the math/Ohms Law won't work, as mentioned in the FSM, the load is going to be a lot less. Your going to have a increase in voltage drop across the points because it's a poor connection, intermittent, arcing, carbon build up, etc. So, even though you may have 13-14 System Volts while running, you are not going to be putting that much voltage to the coil. Running the .5-.6ohm ballast resistor is just going to shorten your coil and points life.
This why point type ignitions were eliminated in 1972-73, it's much more efficient to control a coil with a ECU or magnetic pickup and relay. Will handle more rpms, gives more consistent spark, less maintenance.
This why point type ignitions were eliminated in 1972-73, it's much more efficient to control a coil with a ECU or magnetic pickup and relay. Will handle more rpms, gives more consistent spark, less maintenance.
Mark D.
61-71 Dodge Truck Association
http://www.sweptlinesunlimited.com
1968 W200 Sweptline
1969 D100 Utiline
1993 D250 Club Cab
61-71 Dodge Truck Association
http://www.sweptlinesunlimited.com
1968 W200 Sweptline
1969 D100 Utiline
1993 D250 Club Cab
- Jims68
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Re: Ballast Resistor question
OK.... now first I have to say, I am NOT trying to beat a dead horse with this subject. BUT... I found this page informative and mentions about ballast resistors and how coils work with condensers etc. YES, it says it's for lawn tractors... but pertains to everything. It gives a link on how to check the OHMS resistance on a coil etc. LOOK for the FLASHING IMPORTANT word.
Check it out!
http://gardentractorpullingtips.com/ignition.htm
Check it out!
http://gardentractorpullingtips.com/ignition.htm