----- Original Message -----
Sent: Monday, September 12, 2005 5:23
PM
Subject: [FlyRotary] Re: Ignition Coil
Connectors
Mark,
Good suggestions, never thought of
that.
I went to a auto supply specialist the other day
and he told me that the wiring is only + ve and - ve ( two wires) and in fact
some coils ( in Australia) have non-plug type connections ( thread and
lock nut).
Does Tracy use the LS 1 coils for any particular
reason i.e.because there much lighter or something like that. I'm led to
believe they are very reliable and they don't stock them because there is
little to no demand for non-genuine replacement - so that's good info. They
are found in the GM V8 here in Australia but the cost is about $150 from GMH (
your GMC)
Also can someone explain the wiring of the
injectors, I didn't ask about that.
George ( down under)
I'll give the injector wiring a shot,
George.
There's not much to it compared to the ignition
wiring. The injectors each have two leads coming out of their electrical
connector. One lead has 12-14Volts on it and the other lead (it doesn't
matter which lead) is attached to a lead from the EC2 (or some Fuel
Injection computer unit) which is connected internally to a high power
transistor. When the EC2 computer turns on the transistor it
grounds (completes the circuit) for that injector. A completed circuit =
current flow = injector open = fuel flow = power. When the "ON" time
equals that determined by the computer for the power requirements/conditions -
the EC2 turns off the transistor opening the injector power connection to
ground and the injector closes until the next pulse.
So, that basically means one side of each injector is
wired to 12V (often with a switch/circuit breaker) and the other side to a
lead from the injection computer.
Tracy's Ec2 has specific instructions for how to hook up
the wiring for the injectors (including the resistors if you are using low
impedance injectors) and their disabling switches.
The basic things you need are
1. The electrical connector (female) which plugs
onto the injector connector. Most of these have keys to prevent you from
plugging a low impedance injector into a circuit meant for a high impedance
injector - doing that could damage the computer. That means you
need the female connector that has the key position to match you
injectors. The key (raised bit of plastic) is generally (but not always)
in the center of the connector for the low impedance injector and off-center
for the low impedance injectors. So you need to check and be
certain.
2. Wire to hook up your four injectors (or
however many) to the controller, switches and power. So for 4 injectors
you should have 4 pairs of wire. One wire to the power (through a
switch/circuit breaker or whatever) and the other to the correct terminal on
the computer.
3. It is important to hook up the correct injector
positions (such as primary, secondary) to the right leads from the computer to
make certain that when the computer thinks its turning on the primary
injectors (or secondary) - that it is. It might run hooked up wrong
- but trouble shooting it that way can drive you crazy {:>)
Ed A