641 Charging light Resister Questions

J. J. R. · Nov 6, 2017

I converted my 641 gas over to a single wire 12volt alternator and installed electronic ignition with a flame thrower coil. The new coil has at least 3oms of resistance, so can I completely eliminate the white in line resister that came with my alternator kit?
Also I don't have an amp gauge, so is there a way to make the old indicator dash light work with this new 12volt system? I do have a 12volt bulb, but not sure how to wire it in.
Thank for any advice or help
JJR

JMOR · Nov 6, 2017

It all depends on what specific alternator & what specific VR that alternator uses. There are no blanket one size fits all answers!

sunbeam · Nov 7, 2017

not for a single wire a 3 wire yes.

rvirgil_KS · Nov 7, 2017

Electric ignition installation instructions should tell about coil. Normally 3 ohms needs no extra resistor.

Assuming you have a Delco alternator. Remove edge cover plug and check between the 1 and 2 tabs. If there is no shorting jumper you could try connecting original indicator lamp to #1 tab. This might also excite it to begin charging without reving the engine.

J. J. R. · Nov 8, 2017

Thank you for the information.

J. J. R. · Nov 8, 2017

You were right. I didn't need the resister for the setup I'm using. In fact it seems to run better not too. Better spark.
Thank You.

J. J. R. · Nov 8, 2017

You are correct. Did some research and found out what I had and what I needed and didn't need. Thank You.

641 Charging light Resister Questions

J. J. R.

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JMOR

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sunbeam

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rvirgil_KS

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J. J. R.

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J. J. R.

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J. J. R.

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