Return-Path: <marv@lancaironline.net>
Sender: <marv@lancaironline.net> (Marvin Kaye)
To: lml
Date: Tue, 24 Sep 2002 11:51:57 -0400
Message-ID: <redirect-1770341@logan.com>
X-Original-Return-Path: <Brent@regandesigns.com>
Received: from [148.78.247.23] (HELO cassiopeia.email.starband.net)
  by logan.com (CommuniGate Pro SMTP 4.0b8)
  with ESMTP id 1770337 for lml@lancaironline.net; Tue, 24 Sep 2002 11:51:29 -0400
Received: from regandesigns.com (vsat-148-63-101-227.c002.t7.mrt.starband.net [148.63.101.227])
	by cassiopeia.email.starband.net (8.12.4/8.12.4) with ESMTP id g8OFpFJH024317
	for <lml@lancaironline.net>; Tue, 24 Sep 2002 11:51:18 -0400
X-Original-Message-ID: <3D908A55.90301@regandesigns.com>
X-Original-Date: Tue, 24 Sep 2002 08:52:53 -0700
From: Brent Regan <Brent@regandesigns.com>
User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.0.1) Gecko/20020823 Netscape/7.0
X-Accept-Language: en-us, en
MIME-Version: 1.0
X-Original-To: Lancair <lml@lancaironline.net>
Subject: Re: TSIO 550 E1B backfires
Content-Type: text/plain; charset=us-ascii; format=flowed
Content-Transfer-Encoding: 7bit

Carl's airplane's flatulence:

<My TSIO 550 with GAMI injectors, Slick Mags has backfired 4 times 
recently.>

A single cylinder misfire in a turbocharged engine will not produce a 
"significant" upset. Two things that I can think of will. One is 
preignition while the intake valve is open and the other is an 
intermittent short to ground of the P-lead. Both will produce a several 
revolution interruption of the combustion process followed by the normal 
operation you describe.

Check your ignition switch.
Check your plugs.
Check the distributor/points portions of your mags.

In that order.

Regards
Brent Regan

BTW, IMHO key ignition switches have no place in an airplane. They are 
expensive, heavy and fail with alarming regularity. They also provide NO 
security as they are trivial to hot wire. On a IV the door lock provides 
all the theft security you need. About 5 years ago my hanger was broken 
into and someone attempted to get my radios. A small paint chip, a 
slightly bent handle and lots of fingerprints were evidence of the crime 
but there was no other damage.

BR