Already founded much informations in forum.
Coil have a ballast next.
Have you notice about this 16C6 coil + ballast today parts numbers / lucas code ?
Truly my coil is a 6Volts ?
Fred
Not sure about the numbers but yes the coil will be a 6v if the car has a ballast resistor. The ballast resistor drops out of circuit while the car is being started, giving the coil the full 12v for a boost to the park plugs.
I donāt think that s so!
The use of a 6v coil is counter intuitive to the need for a resistor .
OTH. , using a 12 v coil might be. Crank and fire on 12.
Run on 5 for the protection of points and condenser !
Archaic, if points and condenser have been superceded by an electronic device. Ala SIII or pertronix.
Carl
The nomenclature is confusing, Carl. I donāt know why they even called these coils 6 voltāmay have come around when batteries were changing from 6 to 12. Maybe they actually retained 6V system coils for 12V cars.
Anyway, the more correct terminology is āself-ballastingā and āexternal ballast,ā both pertaining to points ignition. It has to do with the coilās internal resistance. Too low and the coil will get hot, especially if ignition is on, engine not started, and points happen to be closed. So it has to be about 3 ohmsāwhich makes 40 watts of heat. OTOH you can use a 1.5 ohm coil, but add an external ballast, so the heat is distributed between the ballast resistor and the coil. The latter is often wired so that the battery voltage bypasses the resistor whilst startingāovercoming the loss of voltage when the battery is loaded by the starter motor.
The lower resistance coils give better sparkā¦for complicated reasons involving inductance. Electronic ignition systems sometimes use ~0.8 ohm coils. But the electronics prevents the coil from getting continuous voltage (longer dwell than necessary), so they can get away with it. With MSD and other capacitive discharge ignitions, the coil gets no continuous current and barely heats up at all. IMHO.
2 Likes
thank you!
Founded many users changed this coil with a 12V but some tell about fire problems ā¦
To evitate problems looking for same coil , iām sure car running fine with this oneā¦however canāt found a substitute.
Some fonts tell use c35812 / 45227 or dlb110ā¦i already this codes founded but really not sureā¦
PS yes i confirm i have a ballistor here !
Fred
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Itās somewhat academic, Fred - nominally the coil just steps up the car voltage to HT ignition voltage. Principally either coil āvoltageā will do from either car voltage - itās sort of roundabout and carousel factors, elucidated by Robertā¦
As he says; with points ignition the external resistor is essential for either coil - to prevent coil burnout with engine stationary ad ign āonā. However, with engine cranking the resistor will interfere with spark energy - so it is bypassed while crankingā¦
With EI systems a resistor is sometimes used to protect the electronics by reducing coil current - sometimes built into the coil and sometimes external. Cranking bypass is not used - and EI systems positively break coil neg/ground unless the engine is running, preventing stationary overheating dangersā¦
To make sense of coil selection; you will need intimate details on their inside composition - which is not readily available. Otherwise; most general coils will run any engine/ignition systemā¦
As an aside, with EI; any coil/car voltage combination will give double or triple HT voltage compared to points ignition. Which is why 6V coils are preferred for points ignition - and necessary for 6V car systemsā¦
Frank
xj6 85 Sov Europe (UK/NZ)
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Thank you Frank.
i hope start car Tomorrowā¦
Actually, the coil āsteps up,ā via a typical turns ratio of 1:100, the āback EMFā or back voltage generated by the primary when it goes open circuit and its magnetic field collapses. That back voltage is around 600V. The ~600V zener in the AB14 ignition amplifier is there to protect the amp from excessive back voltage. IMHO.
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Indeed, Robert - and if the Zener fails (seldom!) wholly or in part, there is a ground path from coil neg to ground. Which interferes with ignition in odd waysā¦
Frank
xj6 85 Sov Europe (UK/NZ)
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Obviously car doesnāt startā¦
Smoke come from start relayā¦
Desolate i do start another question for youā¦
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Does the engine actually crank, Fred - and are the relay connections correctā¦?
It may just be a faulty relay; dirty internals may cause the relay to overheatā¦
Frank
xj6 85 Sov Europe (UK/NZ)
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Frank ,
First idea was leave all ignition components immaculate during engine/suspension/gear works.
in fact ignition was ok before engine works.
During works founded oxidation process in stabilzer/LH side, particularly next to elephant nose (exit rain water) so i decided to paint this part and obviuosly other side too (coil/RH side).
2 weeks ago ended engine works , fixed again coil and ballistorā¦try startā¦and smoke come
from ballistor+inside distributor too (wire from cover to contacts ā¦āmelted wire insulationā!)
iām quite sure wires connection was the same , i have no removed this contacts next to coil or starting relayā¦
Perhaps during last 3 years accidentaly i have removed and bad refitted like you wrote!
Can paint work like insulation ? does exhist that coil/ballistor screws works like ground (-) contact ? Can failure come from paint insulation effect ? is a crazy think ?
SORRY ENGLISH COME FROM SCHOOLā¦LONG TIME AGO!
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You seem to be smoking a lot, Fredā¦
āSmokeā are of two kinds; something (that should not be there) just evaporating from ānormalā hot surfaces - and something actual burning. With electrics; the latter means excessive current - a āshortā, possibly caused by misconnectionsā¦
With any ignition system; no(!!) +12V must ever be connected to coil neg - coil neg is considered ground. if +12V is connected to coil ā-ā something will surely burn.
The white wire from ign key (+12V), and eventual coil resistor in series, must(!) go to coil ā+ā. Checkā¦
If you have done something wrong here; expect damageā¦
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DIY painting certainly is no reliable method for insulation - but it may interfere with current flow if applied to connections. Also; electric components tends to heat up - and unless the paint used is heat resistant; 'smoke may appearā¦
Again; does the engine actually crankā¦?
Frank
xj6 85 Sov Europe (UK/NZ)
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Frank ,
smoked drugs when decided rebuild this car! 
I donāt know when/why but sure youāre right ā¦coil wire inverted ā¦
Ballistor first made smoke youāre ok againā¦was heated paint , smoke inside cap was cover wire.
New coil/cap/ballast/rotor remake cover wire ā¦no smoke now but no light/spark.
yes starter work.
Perhaps contacts broken too ? havenāt founded here this week.
Finally tested coil voltage , founded about 9 (key in 1) and during ignition(key in 2) donāt come a ballistor bypass 12V like forum users wrote.
perhaps all coming from starter relay ?
Time for unable Fred is over, willl call an able workerā¦foolish not call him first.
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If you have mechanical points ignition, Fred; you need to inspect the wires inside the distributor - they may be burnt off. And check the points/points gap - there may be something thereā¦
If you have electronic ignition; itās quite possible that an electronic module is bustedā¦
Connect a test lamp between coil neg and ground. With ign āonā the test lamp should be fully lit - while cranking; the lamp should dim and flicker.
There is no shame in seeking professional help - with points ignition the set-up is sometimes complicatedā¦
Frank
xj6 85 Sov Europe (UK/NZ)
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With ign āonā, engine stopped and coil not grounded; you should read battery voltage(!) on coil pos, both ends of the resistor and coil neg. Lower voltage means that current is flowing - which it should not.
Voltages with engine running is dynamic - and oscillates very rapidly.
I got a chuckle as to āelephantās noseā. A great term for the gaiters form the drain for the intake at the cowl.
In medical terms or religious, a miter valve. Our hearts have them!! Bishops wear a cap that looks like them.
As insulation, paint can be good or bad!!! Protecting a hot wire, no. Preventing a good ground connection, oh yes, do that well. Look at the battery ground, (-) at wing wall. Mine caused much travailā¦
As you have an interesting car, it might be time to 'go back to school". Mechanical shop class. Learn the function of things in the car. learn how that function is applied in your car. Electrical and mechanical .
Diagnostics are preceded by function knowledge.
Ignite the fuel in the combustion chamber. The function of the ignition system. Components, switch, wires, coil, perhaps a ballast and a distributor.
The distributor low voltage wires and much higher voltage wires. How the distributor and coil accomplish this for another timeā¦ Home work for Fred !!!
Carl
Dears,
now is time for 2 relays, founded :
- 6ra on firewall starter 33231E 12v 4369
- 6ra on RH side next coil , horn ralay 33208(6?)9F12v2969
lost on sng barratt codesā¦can help me for correct buy ?
Some forum users tell about c33231 Others c.35884 for ballast typeā¦Others tell about 22RA perhaps 36611ā¦so iām confused 
whatās 2 correct codes?
thankāyou
Fred.
Frank ,
leave this post and goahead with relays/diagram only.