Return-Path: Received: from usgate03.e-mail.com ([204.146.55.143]) by ns1.olsusa.com (Post.Office MTA v3.5.3 release 223 ID# 0-64832U3500L350S0V35) with ESMTP id com for ; Mon, 8 Jan 2001 23:23:35 -0500 Received: Received: by usgate.e-mail.com with ESMTP id EAA38362 for ; Tue, 9 Jan 2001 04:31:05 GMT Received: from johnmta1.fmglobal.com ([159.221.80.211]) by mail.fmglobal.com (PMDF V6.0-24 #47482) with ESMTP id <01JYOKUFTLCY0000YY@mail.fmglobal.com> for flyrotary@olsusa.com; Mon, 08 Jan 2001 23:30:23 -0500 From: charles.harbert@fmglobal.com Date: Mon, 08 Jan 2001 19:18:22 -0500 Subject: Re: turbo To: flyrotary@olsusa.com Message-id: Reply-To: flyrotary@olsusa.com Mime-Version: 1.0 >>> ^ >> ^ >>>> FlyRotary <<<< ^ << ^ <<< >>> ! >> ! >>>>>>>>>><<<<<<<<< ! << ! <<< >> Dennis, I used a T04 turbo made by Turbonetics on my 20B. I planned on flying at higher altitudes (18K'), so I sized it to handle the needed boost to avoid overreving (catastrophic failure). If you use a stock Mazda turbo, you must have the compressor map, so that you do not exceed the pressure ratio at higher altitudes. It has an Inconel tubine wheel which is absolutely needed (Mazda uses this, too). I have not used full hp of the engine, but it will easily make 300 hp @ 6,000 at about 6 psi of boost. The factory rating was 365 hp at 6,200 rpm, but I believe this was over 10 psi of boost. There's a lot of info to know about turbo's and their associated systems (fuel injection, ignition, waste gate control, intercoolers, etc), but overall it is a very efficient way to carry hp to altitude and go fast. Paul Yaw built a turbo 13B and made 265 hp @ 6,500 rpm which was detailed on this forum a couple yrs ago. Remember, this is max hp and I would not recommend that you plan on using this continually (too much fuel burn and heat generation, plus reliability). If you are puting together a NA 20B, are you planning on replacing the lower compression rotors? If you do make sure you balance it correctly. It will not work as well to turbo it afterward with high compression rotors because of possible detonation. A stock NA 20B should make 240-250 hp with stock rotors. Hope this helps. Chuck DSmith0021@aol.com on 01/04/2001 05:14:42 AM Please respond to flyrotary@olsusa.com To: flyrotary@olsusa.com cc: Subject: Re: turbo >>> ^ >> ^ >>>> FlyRotary <<<< ^ << ^ <<< >>> ! >> ! >>>>>>>>>><<<<<<<<< ! << ! <<< >> I would like to know what turbo is being used on the 13b & 20b engine. I am planning to use a 20b on my Wheeler Express. I want to use the NA rotors for the extra compression. I was toying with the idea of adding a turbo later after I get the bugs worked out of the installation and get the plane in the air. I would like to know how much boost and horse power are to be expected and the pros and cons. Thanks ............Dennis Smith Thomson, Ga. >> Homepage: http://www.members.home.net/flyrotary/ >> Subscriptions: http://olsusa.com:100/guest/RemoteListSummary/flyrotary >> Homepage: http://www.members.home.net/flyrotary/ >> Subscriptions: http://olsusa.com:100/guest/RemoteListSummary/flyrotary