wrong coil shipped, need help for right one

[DutchEdwin]

I ordered a new coil from Rockauto for my Plymouth Plaza suburban, V8 engine and 6V battery.

Rockauto got an error in there catalog and shipped me a 12V type, from Standard: UC12.

They are helpful and advised me a type from a 1954 Plymouth suburban 3.8l 6 cyl engine: from Standard, type UC14. However this is not a V8 engine.

Is this coil the right coil for me, so does it matter if a coil is used for a 6 cyl or a V8 engine?

Thanks.

One good word for Rockauto. As I'm at the other side of the ocean and shipment and tax are a high percentage of the part they offered me a refund on the 12V coil. They will get back on me to let me know if they want the 12V coil back or not. Is yes they will take care for the shipment. If the UC14 is the correct one, I will only have to pay for the part, not the shipment.

That's what I call service.

[Plymouthy Adams]

just don't use a dropping resistor..

[DutchEdwin]

just don't use a dropping resistor..

Tim, Thanks for the advice, but I already know this. The resistor gets hot, thus resulting in a drop of voltage of the coil output, in the end just a low spark and bad running engine.

I need the 6V coil.

[Oldguy48]

I don't think it matters whether the coil is used on a 6 cylinder or 8 cylinder engine, as long as the primary voltage is correct.

[Plymouthy Adams]

rockauto will allow search on part numbers however the numbers UC 12 and UC 14 does return the description of universal coil.. the online catalog will not in any manner give further description as to if internal resistance etc etc of the coil...without this value there is no way way I or anyone else could answer the question as for how practical this unit is..only if you use it on a 12 volt system do you need the value so to select the correct resistor..but again...IF EXTERNAL resistor type it WILL work on 6 volt and DO NOT use a resistor...

as for 4-6-8 cylinders should not be relevant...

IF however the coil is universal and of the internal resistor type then the application for six volt will not apply due to the resistor being integral and in play regardless of voltage use and will drop the applied voltage when in use...the primary of these coils will read about 2.8 to about 3.8 ohms

you can easily get a coil for a 6 volt volkswagen in your country..why not just use that...voltage is voltage and coil could care less about polarity

[DutchEdwin]

Thanks for the replies, glad the number of cylinders do not matter.

I'll look for the beatle type coil, see what I come up with. Now I know the right answer to ask.

Is there a brand (and type) in the US that is the correct one for 6V? and where do they sell it, just in case I do not get the right answer over here.

[Plymouthy Adams]

if the coils primary on the one they sent is approx 1.5 ohms (range 1.2 to 1.8 avg.) use it without a resistor..these are designed to work on the avg output generator powered car of 6.8 to 7.2 volts..

[DutchEdwin]

if the coils primary on the one they sent is approx 1.5 ohms (range 1.2 to 1.8 avg.) use it without a resistor..these are designed to work on the avg output generator powered car of 6.8 to 7.2 volts..

I received the tech data from SMP.

The coil Standard UC14 has a primary resistance of 1.04 - 1.27 ohms; secondary resistance of 7700-9500 ohms; output voltage of 25kV; draws 5A. The coil type is a CAN, whatever that means....

It surprises me how fast SMP gave technical answers on their Standardbrand parts.