X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from [24.25.9.103] (HELO ms-smtp-04-eri0.southeast.rr.com) by logan.com (CommuniGate Pro SMTP 5.0c2) with ESMTP id 719755 for flyrotary@lancaironline.net; Mon, 12 Sep 2005 19:03:46 -0400 Received-SPF: pass receiver=logan.com; client-ip=24.25.9.103; envelope-from=eanderson@carolina.rr.com Received: from edward2 (cpe-065-188-083-049.carolina.res.rr.com [65.188.83.49]) by ms-smtp-04-eri0.southeast.rr.com (8.12.10/8.12.7) with SMTP id j8CN2x1v016555 for ; Mon, 12 Sep 2005 19:03:00 -0400 (EDT) Message-ID: <001d01c5b7ee$26f950e0$2402a8c0@edward2> From: "Ed Anderson" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: Ignition Coil Connectors Date: Mon, 12 Sep 2005 19:03:13 -0400 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_001A_01C5B7CC.9FB33360" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.2180 X-MIMEOLE: Produced By Microsoft MimeOLE V6.00.2900.2180 X-Virus-Scanned: Symantec AntiVirus Scan Engine This is a multi-part message in MIME format. ------=_NextPart_000_001A_01C5B7CC.9FB33360 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable ----- Original Message -----=20 From: George Lendich=20 To: Rotary motors in aircraft=20 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 =3D current flow =3D = injector open =3D fuel flow =3D 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. =20 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 {:>) =20 Ed A ------=_NextPart_000_001A_01C5B7CC.9FB33360 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
 
----- Original Message -----
From:=20 George=20 Lendich
Sent: Monday, September 12, = 2005 5:23=20 PM
Subject: [FlyRotary] Re: = Ignition Coil=20 Connectors

Mark,
Good suggestions, never thought of=20 that.
I went to a auto supply specialist = the other day=20 and he told me that the wiring is only + ve and - ve ( two wires) and = in fact=20 some coils ( in Australia) have non-plug type connections ( = thread and=20 lock nut).
Does Tracy use the LS 1 coils for any = particular=20 reason i.e.because there much lighter or something like that. I'm led = to=20 believe they are very reliable and they don't stock them because there = is=20 little to no demand for non-genuine replacement - so that's good info. = They=20 are found in the GM V8 here in Australia but the cost is about $150 = from GMH (=20 your GMC)
 
Also can someone explain the wiring = of the=20 injectors, I didn't ask about that.
George ( down under)
 
I'll give the injector wiring a shot,=20 George.
 
There's not much to it compared to the = ignition=20 wiring.  The injectors each have two leads coming out of their = electrical=20 connector.  One lead has 12-14Volts on it and the other lead (it = doesn't=20 matter which lead) is attached to a lead from the EC2 (or = some Fuel=20 Injection computer unit)  which is connected internally to a high = power=20 transistor.   When the EC2 computer turns on the transistor = it=20 grounds (completes the circuit) for that injector.  A completed = circuit =3D=20 current flow =3D injector open =3D fuel flow =3D power.  When the = "ON" time=20 equals that determined by the computer for the power = requirements/conditions -=20 the EC2 turns off the transistor opening the injector power connection = to=20 ground and the injector closes until the next pulse.
 
So, that basically means one side of each = injector is=20 wired to 12V (often with a switch/circuit breaker) and the other side = to a=20 lead from the injection computer.
 
Tracy's Ec2 has specific instructions for how = to hook up=20 the wiring for the injectors (including the resistors if you are using = low=20 impedance injectors) and their disabling switches. 
 
The basic things you need are
 
1.  The electrical connector (female) = which plugs=20 onto the injector connector.  Most of these have keys to prevent = you from=20 plugging a low impedance injector into a circuit meant for a high = impedance=20 injector  - doing that could damage the computer.  That = means you=20 need the female connector that has the key position to match you=20 injectors.  The key (raised bit of plastic) is generally (but not = always)=20 in the center of the connector for the low impedance injector and = off-center=20 for the low impedance injectors.  So you need to check and be=20 certain.
 
 2.  Wire to hook up your four = injectors (or=20 however many) to the controller, switches and power.  So for 4 = injectors=20 you should have 4 pairs of wire.  One wire to the power (through = a=20 switch/circuit breaker or whatever) and the other to the correct = terminal on=20 the computer.
 
3.  It is important to hook up the = correct injector=20 positions (such as primary, secondary) to the right leads from the = computer to=20 make certain that when the computer thinks its turning on the primary=20 injectors (or secondary) - that it is.  It might run hooked = up wrong=20 - but trouble shooting it that way can drive you crazy = {:>)
 
 
Ed = A
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