Return-Path: Received: from fed1rmmtao11.cox.net ([68.230.241.28] verified) by logan.com (CommuniGate Pro SMTP 4.2b2) with ESMTP id 3196520 for flyrotary@lancaironline.net; Thu, 29 Apr 2004 01:00:40 -0400 Received: from smtp.west.cox.net ([172.18.180.57]) by fed1rmmtao11.cox.net (InterMail vM.6.01.03.02 201-2131-111-104-20040324) with SMTP id <20040429050038.OYVP29117.fed1rmmtao11.cox.net@smtp.west.cox.net> for ; Thu, 29 Apr 2004 01:00:38 -0400 From: To: "Rotary motors in aircraft" Subject: Re: [FlyRotary] ECU wiring Date: Thu, 29 Apr 2004 1:00:38 -0400 MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Message-Id: <20040429050038.OYVP29117.fed1rmmtao11.cox.net@smtp.west.cox.net> Paul, At a mininum I would think that you would want at least a battery contactor to interrupt the power to the injectors, but the system will work even without that. Tracy's system is wired in a similar manner. The EC2 provides the ground while the other side of the injector is 'hot.' Tracy recommends that this 'hot' wire be part of the ignition buss, but there is no reason it shouldn't work connected straight to the main buss. Hope that helps. Dave Leonard