X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from fed1rmmtao01.cox.net ([68.230.241.38] verified) by logan.com (CommuniGate Pro SMTP 5.0.9) with ESMTP id 1135299 for flyrotary@lancaironline.net; Wed, 31 May 2006 18:53:57 -0400 Received-SPF: none receiver=logan.com; client-ip=68.230.241.38; envelope-from=dale.r@cox.net Received: from [192.168.1.102] (really [68.2.139.17]) by fed1rmmtao01.cox.net (InterMail vM.6.01.06.01 201-2131-130-101-20060113) with ESMTP id <20060531225309.SKEM19284.fed1rmmtao01.cox.net@[192.168.1.102]> for ; Wed, 31 May 2006 18:53:09 -0400 Message-ID: <447E1DF2.7080208@cox.net> Date: Wed, 31 May 2006 15:51:30 -0700 From: Dale Rogers Reply-To: dale.r@cox.net User-Agent: Thunderbird 1.5.0.2 (Windows/20060308) MIME-Version: 1.0 To: Rotary motors in aircraft Subject: Re: [FlyRotary] Re: Status Update References: In-Reply-To: Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Joe,

Upon further thought, it could be that the pressure regulator is opening at
60-61 PSI; that could account for the slight drop, especially if it stays there
when you get over 6000 RPM. The bad news is that you'd be best off
with 70+ PSI at a mid-6000 RPM climb. IRRC, either Lynn or Leon
(maybe both?) recommended 10 PSI / 1000 RPM.

Dale R.

>Is it possible that your oil pickup is so high from the bottom of the pan
>that it is unporting at high RPM?

Not sure how that would be any more possible with my setup than with anyone else’s. The oil level on my dipstick says “F” and that is relative to the top of the engine – not the bottom of the pan – so, the engine/pickup doesn’t know any different. If anything I’m carrying more oil than a regular setup because the “well” of the oil pan is lower and it takes more oil to fill the broad upper area of the pan than the “well”. So under high suction I have a bigger reserve in the broad area of the pan than a normal, non-sandwich mount setup.

It takes 7qts to fill the engine and oil cooler. Is that what other people are seeing?