----- 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