T3 Ignition Coil |
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Jimble
Falcone Joined: 25 May 2016 Location: Derbyshire Status: Offline Points: 28 |
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Posted: 09 Mar 2018 at 06:31 |
Greetings
About to buy a pair of Lucas 12 volt coils from Vehicle Wiring Products. Resistance advised as 3 ohms, my limited understanding was looking for 4 ohms. What's all this mention of 'ballast' on some ads too? Any advice much appreciated. Kind regards |
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Never pat a burning dog.
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jpc
Senior Member Joined: 06 Oct 2016 Location: Belgium Status: Offline Points: 651 |
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OE Marelli coils are rated at 3.5 ohm (20°C)
I would go for something known to work well on Guzzis https://www.gutsibits.co.uk/pr/TheShop/index.php?q=ignition+coil&f=d&Model=6&search=SEARCH Ballast resistors are an ignition aid to cold starting, not relevant with 12V coils. Hope this helps, it's T3-specific, I don't know about loops.
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Brian UK
Moderator Group Joined: 13 May 2014 Location: Surrey Status: Offline Points: 17641 |
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First of all are you running points or some other electronic system?
Assuming points, the coils from VWP will be fine. If you have some other system best to check what their specification is, because if you put too low a resistance coil on an electronic system you can overload the output transistors. As said above, the ballast system is where a 6 volt coil is used with a series ballast resistor. This resistor is switched out when the starter is engaged, so that you still get a god spark when the battery volts drop.
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Brian.
Better 5 minutes late in this world than years early in the next. |
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