Coil thingy...

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Anton
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Coil thingy...

Post by Anton » Tue Oct 15, 2019 4:59 pm

Hey guys. My mate, Mad Lada Tony, is upgrading from a Lada Niva to a 410.

There's a weird thing on his coil, it gets very hot - bypassing it doesn't seem to make any difference, but does anyone know what it is?

A ballast resistor? A noise suppressor? Anyone know what it actually is???
coil thingy.jpeg
1985 SJ413VX (SJ50V) with SPOA, rear disc brakes, 31x10.5R15 Kaiman Malatesta tyres, an MOT and a lot left to do!

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timwilks13
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Re: Coil thingy...

Post by timwilks13 » Tue Oct 15, 2019 9:18 pm

Its a ballast resistor, has he definitely got the right one for a 410, the 413 ones are a different value I believe. Also they only work with a coil design for one, so if the coil has been replaced it may not need it, or may need a different one.
1986 SJ410 - Furry dice, new window winder.

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Anton
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Re: Coil thingy...

Post by Anton » Tue Oct 15, 2019 10:26 pm

Roger that. I'm told it works without it, and there's a good chance that the coil is actually from a Lada Niva. He's got a few of those, and he did say something about pulling the coil out and trying another one.

Thanks for the info, I'll tell him not to worry about it.
1985 SJ413VX (SJ50V) with SPOA, rear disc brakes, 31x10.5R15 Kaiman Malatesta tyres, an MOT and a lot left to do!

My: Build thread To-do list Pay and Play map

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ScottieJ
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Re: Coil thingy...

Post by ScottieJ » Wed Oct 16, 2019 10:19 am

The ballast resistor is needed, they do get hot, That’s why they have a ceramic coating.

It is needed to drop the voltage to 9v for the coil as it’s a 9v coil. it’s only bypassed briefly during starting if wired correctly.

Bypassing it permanently will cook the coil, points and condenser.

You MUST run a 9v coil with ballast resistor when running a dizzy with points.
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Anton
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Re: Coil thingy...

Post by Anton » Wed Oct 16, 2019 1:13 pm

Even if the coil has been changed?

I don't know anything about points, but he did confirm that this machine has points.
1985 SJ413VX (SJ50V) with SPOA, rear disc brakes, 31x10.5R15 Kaiman Malatesta tyres, an MOT and a lot left to do!

My: Build thread To-do list Pay and Play map

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timwilks13
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Re: Coil thingy...

Post by timwilks13 » Wed Oct 16, 2019 2:40 pm

I would just swap the lot to a 413 dizzy and coil, do away with the points all together.
1986 SJ410 - Furry dice, new window winder.

10 kinds of people in this world, those who understand binary and those who dont.

if you can read this you're too close to the monitor, sit back and save your eyes!!
My build, formally Trotters build.

Anton
I spend far too much time on here
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Joined: Tue Jan 12, 2010 12:12 pm
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Re: Coil thingy...

Post by Anton » Wed Oct 16, 2019 5:33 pm

Sounds like a good plan, Tim. Do you know if a 413 dizzy is swappable? Google isn't being much help at the moment...
1985 SJ413VX (SJ50V) with SPOA, rear disc brakes, 31x10.5R15 Kaiman Malatesta tyres, an MOT and a lot left to do!

My: Build thread To-do list Pay and Play map

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ScottieJ
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Re: Coil thingy...

Post by ScottieJ » Wed Oct 16, 2019 11:38 pm

Anton wrote:
Wed Oct 16, 2019 1:13 pm
Even if the coil has been changed?

I don't know anything about points, but he did confirm that this machine has points.
If the coil has been changed it needs to have been changed to a 9v unit and use the ballast resistor. a 12v coil will fry points.

You can swap in the 413 dizzy and a 413 coil, problem is theres no suitable point to fit a vacuum port on the carb for the vacuum advance.
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