Re: 9N resistor

Posted by Bob on March 22, 2006 at 21:24:01 from (64.21.249.40):

In Reply to: Re: 9N resistor posted by old on March 22, 2006 at 19:50:00:

The 12-Volt "square can" aftermarket coils for the "N"'s need just a little help, in the form of a small voltage drop for good longevity, and "Dell's secret trick resistor" provides that small voltage drop.

Dell came up with his .5 Ohm resistor based on what used to be supplied along with the aftermarket coils some years back, and using 2- 1 Ohm 10 Watt resistors in parallel provides a readily available and economical source for a resistor of that value.

The typical Dodge or other standard off-the-shelf ballast resistors are typically 1.4 Ohms, 1.5 Ohms, 1.6 Ohms, or 1.8 Ohms, WAY more resistance than is required for this application. Too much resistance leads to a weak spark, causing hard starting, and perhaps misfire when running.

However, the off-the-shelf resistors work just fine with 6-Volt or "use WITH external resistor" 12-Volt "round-can coils".

So we are talking about 2 different "animals" here... the "oddball" aftermarket square can 12-Volt coil for Fords with the "front-mount" distributor, vs. 'most other applications with the more standard and robust "round-can" coils.

I completely agree with you about using the "Dodge", or similar, resistors in MOST 12-Volt conversions, HOWEVER, Dell is "on the money" with the 1/2 Ohm resistor for this ONE SPECIFIC APPLICATION... the "12-Volt" square-can aftermarket front-mount Ford coil.

Replies:

• Re: 9N resistor old 21:30:17 03/22/06 (0)

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