Does a 1955 331 hemi need a ballast resistor.
The 331 in my car had no resistor..... not even a resistance wire.
This engine was a replacement for a 315 hemi..
Posted 2023-06-27 3:33 AM (#630436 - in reply to #630434) Subject: Re: 1955 331 hemi ballast resistor
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Posts: 9688 Location: So. Cal
No 6 volt system needs the ballast resistor. So if you are still running 6 volts, or you have an internal ballast in your coil on a 12 volt system, you are fine.
Posted 2023-06-27 8:21 PM (#630454 - in reply to #630434) Subject: RE: 1955 331 hemi ballast resistor
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Posts: 9914 Location: Lower Mainland BC
green monster - 2023-06-26 9:31 PM
Does a 1955 331 hemi need a ballast resistor.
The 331 in my car had no resistor..... not even a resistance wire.
This engine was a replacement for a 315 hemi..
Hmm....A 315 hemi = a 56 Dodge motor which would have been fed by a 12V system, which did use ballast resistor (if stock).
Any details on the 315? Like an engine number (stamped on the flat area beside the oil filler/breather tube, above the water pump, ahead of the valley cover)
Posted 2023-06-28 2:13 PM (#630468 - in reply to #630434) Subject: Re: 1955 331 hemi ballast resistor
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Posts: 44
My car always had the 12volt system.
Yes it was a D500 engine and I scrapped it 25 years ago.
The previous owner dropped the 1955 331 Hemi in after blowing the 315 up.
I am leaving sleeping dogs lie since the 331 is proving to be a great engine!
Yesterday I found the Vacuum advance was junk and most likely the cause of my issues.
Just waiting for the part to arrive....
1955 331 hemi ballast resistor
