Return-Path: Received: from imf25aec.mail.bellsouth.net ([205.152.59.73] verified) by logan.com (CommuniGate Pro SMTP 4.2b6) with ESMTP id 242304 for flyrotary@lancaironline.net; Sat, 03 Jul 2004 22:25:00 -0400 Received: from [10.1.1.102] ([65.12.218.16]) by imf25aec.mail.bellsouth.net (InterMail vM.5.01.06.08 201-253-122-130-108-20031117) with ESMTP id <20040704022430.FIYD1781.imf25aec.mail.bellsouth.net@[10.1.1.102]> for ; Sat, 3 Jul 2004 22:24:30 -0400 Message-ID: <40E76A5C.5020900@bellsouth.net> Date: Sat, 03 Jul 2004 22:24:28 -0400 From: Mike Robert User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.7) Gecko/20040608 X-Accept-Language: en-us, en MIME-Version: 1.0 To: Rotary motors in aircraft Subject: Re: [FlyRotary] Re: EC2 programming References: In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit John Slade wrote: >>In fact if the Peak and Hold are driven with an injector pulse > duration calculated for a saturation type injector then >>you would get more fuel flow for the same pulse duration. > > Hmmm. Tracy said it would be ok to mix and match (with resistors for > the peak & hold). I guess I'll have to adjust the MAP table accordingly. > John > *** Automobile use warning! *** I have used the same injector opening value (1.0 msec) with Mazda injectors of both types (P&H, Sat) quite happily. The low Z injectors have been driven with both P&H (1.0 msec DC opening pulse and 30% PWM afterwards) and resistor schemes (5 ohm, 25W Ohmites mounted to a 25x50mm Al plate) with no change in fueling tables. Of course, the high Z injectors were driven directly. I currently use 680s with a resistor pack as described. The resistors are accessible while running, they never get more than barely warmer than ambient temp in the closed compartment they reside in. -Mike