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10-30-2015, 06:11 PM | #1 |
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hot ignition coil, texas t distributor,12 v system
hello- my new coil boiled the oil out of it - manufacturer said coil had internal resistor-i'm running 12 v . all ohmages were open ckt in coil ckt as they should have been and no spark plugs were shorted out.
iwas told not to throw the ignition switch until the last moment of start up so as to reduce current thru coil when points may be closed and use additional extern. resistor in addition to the intern rest. , etc . has anyone else had this problem and if so how did they solve it? is there such a thing as a heavy duty coil? i notice that teaxas T sells a coil for $15, so i guess that in general, a heavy duty coil is not needed. |
10-30-2015, 07:39 PM | #2 | |
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Re: hot ignition coil, texas t distributor,12 v system
Quote:
Leaving the switch on can cause a heat build up however we all do it a lot. Proper primary circuit resistance will help this issue. The best ever coil for the Bosch distributor used with the T kit is a Bosch Blue # 0012 coil. Its 3 ohms and i have never sen a defective one. The one on my T has ran with a Bosch distributor for over 9 years. You can buy these on amazon.com... Your coil died because the resistance was too low...... |
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10-31-2015, 06:32 AM | #3 |
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Re: hot ignition coil, texas t distributor,12 v system
thanks bubba, great advice
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10-31-2015, 05:11 PM | #4 |
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Re: hot ignition coil, texas t distributor,12 v system
I've never heard of this happening unless there's a dead short of some kind. It's a 12 volt coil correct? You should be able to leave the car sitting with the ignition on and not have a coil cook off. Not that I'd do it mind you but still. OK, you need a new coil and the Bosch is a good one. Check that the voltage is correct and if it has an internal resistor. You don't need an external one if there's one inside. I think your old one when bad on it's own IF there's no other short in the circuit.
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10-31-2015, 06:49 PM | #5 |
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Re: hot ignition coil, texas t distributor,12 v system
thanks -does anyone know how many watts and ohms the external power resistor is?
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11-01-2015, 10:56 AM | #6 |
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Re: hot ignition coil, texas t distributor,12 v system
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Do yourself a favor and buy a coil for a 1969 Volksbuggen from your local auto part store. Carry a spare under the seat, along with spare points and condenser.
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11-01-2015, 12:26 PM | #7 | |
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Re: hot ignition coil, texas t distributor,12 v system
Quote:
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11-01-2015, 12:36 PM | #8 | |
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Re: hot ignition coil, texas t distributor,12 v system
Quote:
The problem is that the cheap coils sometimes have a much lower resistance like .6 ohms and ask for 20 plus amps , that where the oil gets hot and boils out!!!! Close to 120 watts could heat a small room almost with that kind of wattage.. Last edited by BUBBAS IGNITION; 11-01-2015 at 12:47 PM. |
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11-01-2015, 05:56 PM | #9 |
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Re: hot ignition coil, texas t distributor,12 v system
thanks again- i'm going to take my spare coil to a friend who has a accurate ohmmter and measure its ohms. i take it from bubba's post, current should be 4 amps -so i would need a power resis. = 3 -[whatever primary coil res. is]--watts would be 24watts[1.5 ohm x4 ampsx4 amps] at most but prbably less--------
and i need order 0012 coil for regular usage--- ----for spare p0ints and capacitor , i ask for 69 vw beetle, correct? |
11-01-2015, 09:18 PM | #10 | |
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Re: hot ignition coil, texas t distributor,12 v system
Correct. Get one made in Germany or USA if you want it to last.
Quote:
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