Posted for "richard  titsworth" <rtitsworth@mindspring.com>:

 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
 ½” 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