What I have yet to find is a good explanation of T03 Turbine "stages". The T03/hybrid turbo's listed for sale all have stage numbers (stage 1,2,3, etc) associated with them and I haven't quite figured out the difference (other than the overly simplistic/vague explanation that higher stages are for higher hp). Being a "why" kind of guy, I would like to be able to assimilate this properly.
 
Watching, Waiting, Ebaying..
Dave Staten

DaveLeonard wrote:

Great overlay John.

 

For some reason you plots seem to put this more in the surge region than with the data that I was using.  I don't know what the difference is.   Anyway, based on your initial conditions I decided that maybe going a little smaller (moving the overlay to the right) would be OK.  And what do you know, I have been following a turbo on e-bay with a compressor between the v-trim and p-trim (slightly smaller) and I may just get it for $335.  And it has a nice way to attach the exhaust - unlike that lame TO4 I bought from someone on this list that has no way to attach the exhaust(slip fit turbo's are everywhere and they suck - anyone want to buy one?)  :)

 

Dave Leonard

 

That's better Dave

I don't know Excel all that well, but I tried to make a few additions.

I added a graph overlayed on the compressor map, then generated some plots by iterative data entry.

There must be a way to generate the source data and plot it based on a table of MAP and altitude.

This would help get closer to knowing what settings keeps us on the "island".

Does this make any sense, or am I off on a wild goose chase?

 

Hmmm. A wild goose at 15000 ft while at 46 MAP and 6500 rpm. I wonder where that would go on the chart :)

Regards,

John

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