Colyn, etal,

 

Regarding your recent inquiry, I can’t really comment from knowledge/experience on the Malibu turbos, but a guy who apparently knows about them is Mike Moore of AvWorks in Mooresville, NC.

Linked In:  http://www.linkedin.com/pub/mike-moore/6/557/8b5

 

Last phone numbers I had for him are below (but these are several years old):

704-658-0685

980-428-1961

 

Note, there is a mixed history with Mike Moore and the Lancair community.  He’s a sharp guy/mechanic and has been part of Mike Mangold’s Redbull team for several years.  However, there’s a mixed history of contentious business relationships with Mike (some good, some bad) – apparently challenged on dates/deliveries, etc.  Some folks were very pissed – perhaps some blame on both sides?  I had him help me with some engine work, but I drove to NC and physically oversaw/assisted with all the work on site, and brought my parts home with me (micro-managed the process) – paid on the spot, no problems.

 

I was going to switch to customized turbos (not “P” 550 Turbo-ES), but decided to start with the std ones to create a baseline data reference.

 

You might try and reach out to Mike if you want (cautiously).

 

I would “GUESS” that the exhaust restrictor on your right side is primarily to “balance” the proximity of the wastegate on the left.

 

Here’s a link to a good Garrett Site page http://www.turbobygarrett.com/turbobygarrett/tech_center/turbo_tech101.html

Also look at the TurboTech 102 and 103 page links there (you may find these very interesting technical info on turbo’s and sizing/design).

Note: the articles/links are biased toward auto applications where turbo lag is generally more of a concern than for aero applications.

 

I’ve attached a couple other good/background articles and a Kelly application chart (all several few years old).

 

My TSIO-550 turbos are Part number 646677 (std): Compressor: T04, A/R=.6 housings and Turbine M13, A/R=.58  (spec’s molded into the castings).

 

Curious what your Malibu’s are/say?

 

Rick