coil test

I have three coils on the bench. All are 6v two no name one genuine old Lucas .
Both no names test 2.0 across the primary windings. Lucas 1.9 .
High tension test 6.66 and 7.17 for the no names and 5.56 for the old Lucas.
The Pazon web page says I should get 9-11k for the high tension results.
Is this correct? None of these coils have a particularly bright spark .

Pazon likes you to use 5k resistor caps on the plug end. So if they want 10k at the coil tower end result is
15k resistance. What is the reason for raising the resistance to that level?

Onder said:

Pazon likes you to use 5k resistor caps on the plug end. So if they want 10k at the coil tower end result is
15k resistance. What is the reason for raising the resistance to that level?

Click to expand...

To protect their own black box would be my guess.

Which Pazon ? as per Boyer there are several types and in Boyers case they need resistor plugs or caps for the Digital boxes eg red and blue box and no resistance for the analogue black box.

HT (high tension) lead interference refers to the electromagnetic interference generated by the high-voltage ignition system in vehicles, particularly older ones, that can disrupt radio reception and other sensitive electronics. This interference is caused by the spark plugs firing and the high-voltage current traveling through the HT leads, which can act as antennas, radiating electromagnetic waves.

Well then I guess it works...Pazon is pretty reliable.

kommando said:

Which Pazon ? as per Boyer there are several types and in Boyers case they need resistor plugs or caps for the Digital boxes eg red and blue box and no resistance for the analogue black box.

Click to expand...

As far as I know both for the Pazon although I think they say they are not a requirement actually.

edit: found their page quote for the Surefire:
We recommend fitting an NGK 5K resistor (suppressor) type plug cap
(or similar good quality make), but you can also fit a non-resistor cap.

Not required for Sure Fire only reccommended but are required for their digital ignitions.

Guys, please be careful about the units you quote. Primary resistance is in Ohm (usually about 0.5 - 2 Ohm) while secondary resistance is in kOhm (usually 5-20 kOhm).

- Knut

Onder said:

I have three coils on the bench. All are 6v two no name one genuine old Lucas .
Both no names test 2.0 across the primary windings. Lucas 1.9 .
High tension test 6.66 and 7.17 for the no names and 5.56 for the old Lucas.
The Pazon web page says I should get 9-11k for the high tension results.
Is this correct? None of these coils have a particularly bright spark .

Click to expand...

A Lucas 6 volt coil should measure 1.6 ohms and a Lucas 12-volt coil should measure 3.2 ohms on the primary. I suspect that your meter is reading a little high on that range.

The Lucas coils I've measured are around 10k ohms on the secondary but I've never worried too much about that. It's much more important that you have infinity between the primary and coil case and infinity between the secondary and case.

The spark produced is determined by the plug, plug gap, air pressure, and humidity when bench tested. If 5,000 volts is required to jump the gap, the capability of the coil to produce 10,000 volts makes no difference whatever. When an engine is running, the pressure inside the cylinder and the mixture determine how much voltage is required to make a spark and much higher voltage is required than when bench testing.

mdt-son said:

Guys, please be careful about the units you quote. Primary resistance is in Ohm (usually about 0.5 - 2 Ohm) while secondary resistance is in kOhm (usually 5-20 kOhm).

- Knut

Click to expand...

Sorry. Deleted my posts.