X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from [69.171.58.236] (account marv@lancaironline.net) by logan.com (CommuniGate Pro WebUser 5.0.9) with HTTP id 1069778 for lml@lancaironline.net; Sun, 16 Apr 2006 00:26:54 -0400 From: "Marvin Kaye" Subject: Re: [LML] TSIO-550 Turbo setup for non-pressurizedLlancairs To: lml X-Mailer: CommuniGate Pro WebUser v5.0.9 Date: Sun, 16 Apr 2006 00:26:54 -0400 Message-ID: In-Reply-To: References: MIME-Version: 1.0 Content-Type: text/plain; charset="ISO-8859-1"; format="flowed" Content-Transfer-Encoding: 8bit Posted for "richard titsworth" : Craig, Thanks for the info – much appreciated! A few follow-up questions (if I can bother you with them, and if you have the time)? 1.) Have you ran into any durability/detonation issues with 8.5:1 and 38” max boost? What are you flying, unpressurized IV? How many Hours? Typical cruise altitudes and Power settings? 2.) “Looser” turbos (higher A/R ratio) are slightly larger in physical size (bigger housing) than the std TCM/Garrett A/R=.5 turbos. That is what I am considering. Are you using the larger/looser Mirage Turbos or the Std TSIO-550 A/R=0.5 turbos? Can you maintain 38” to 25,000 ft? Do you know the A/R of the Piper Mirage turbos (the A/R is typically cast into the external turbo housing/face and will be obvious if you look closely – approx ˝” font size) – I believe they are A/R=2.0 (unverified). 3.) Was your engine originally a TSIO-550 with replaced pistons, or an IO-550 with added turbos? Where was the engine work done? Was it dyno tested? Max HP? Max Fuel flow? Cruise (75%) Fuel Flow? 4.) Do you cruise LOP? Do you agree with George Braly (GAMI and Co) LOP theory / suggestions? If yes, any tips on “The Big Pull”? What are your climb settings (full rich)? 5.) Can you provide any “typical” info on MP, RPM, Fuel Flow, & CHT in various flight regimes? 6.) Do you know where your timing is set (less advanced than normal to delay/reduce peek cylinder pressure/detonation)? 7.) Is your Cam standard? Any other modifications (Venturi value seats, ceramic piston coating, mild port/polish, etc)? TCM cast pistons or aftermarket forged pistons? GAMI or TCM injectors? 8.) Why did you build your own intercoolers? Bigger? More efficient? Cowl/baffle arrangement? Any data on how much better they are (temp drop, reduced flow restriction)? 9.) If you don’t have sonic nozzles (no bleed air), do you have an exhaust muff for cabin heat? Is it on the cross-over tube or on the short turbo exit pipes? How well does it work in the cold? Size/Source/Photo? 10.) Can you direct me to any “quasi-normal” Legacy owners flying with a TSIO-550 with the sonic nozzles plugged (Reno racers excluded). I love to gather their experience also. Thanks again (sorry for the 10Q follow-up, but I thought it would be better to put all my questions on the table at once). This site is fantastic for us Lancair newbies. Rick Titsworth Lancair ES (727RT) – Building (micro, sanding, more sanding, more micro, more sanding, repeat daily) Detroit, Mi rtitsworth@mindspring.com Cell 313-506-5604