Jay
The later 1500 Midget coils are ballasted, it is just that the hot wire
itself is the resistor. The hot wire to the coil is pink with green tracer
(if memory is correct) and runs in a large loop inside the engine
compartment wiring harness all the way out to the nose of the car and back
to the coil. The resistor wire drops the coil voltage to 9 volts. The
wire between the starter solenoid and the coil is the starting voltage
supply wire which is delivering a full 12 volts to the coil while the
starter is engaged, bypassing the 9 volt supply wire.
When you upgrade to the Bosch coil, you cannot use the resistor wire in the
stock harness, as the coil won't work correctly on 9 volts if it is designed
for use without ballast resistor. You need to supply the coil with a full
12 volt source. Once you do this, the starter voltage boost wire is
redundant, as you already will have 12 volts at the coil.
The low voltage at the coil could explain your lack of power, as the high
pressures in the cylinders under load require higher spark voltage to fire,
and the coil is unable to deliver that voltage from 9 volts.
David Riker
63 Falcon
70 Torino
74 Midget
http://home.pacbell.net/davriker/
----- Original Message -----
From "Jay Shaffer" <shaf at zenten.com>
To: <team-thicko@autox.team.net>
Sent: Thursday, June 26, 2003 8:15 AM
Subject: Actual LBC content (caution electrics)
> I am going through the ignition system on the 1500. And I am rewiring
> the entire system. First question, What is the function of the wire
> from the plus terminal of the coil to the starter solenoid? Second
> question is 16 gauge wire sufficient for the line between the ignition
> switch and the coil? what about from the start button to the solenoid?
> I can use 12 gauge but it only comes in black (thus thwarting my clever
> color code scheme.)
>
> This is all related to the larger ignition (I think) problem I'm
> having. While in my garage I can rev the engine in neutral up to 3 to
> 5000 Rpm and it doesn't miss. When I get the car to the track and
> attempt to accelerate under load, It misses horribly, what's freaky is
> I can wind it to 5000 RPM but it just has absolutely no power. I mean
> it's like struggling to reach 55 mph at the end of what should be an 80
> mph strait.
> I'm running a Pertronix inside a 25D dizzy with only centrifugal
> advance (vacuum advance disabled) with initial timing set at 9 degrees
> BTDC.
> The Pertronix runs to a Bosch blue super coil. (no ballast resistor.)
>
> Any ideas?
>
> --
> Jay Shaffer
> ITC #66
> '76 Midget
> "This ain't no beauty contest"
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