Paul, (Dave):

Entering Dave's conditions into the stealth 316 website Turbo Outlet Temperature Calculator, the following outlet temperatures result using 45 deg F ambient temperatures:

Turbo outlet temp: 362 deg F @ turbo efficiency of 70%, I/C outlet temp:  108 deg F
Turbo outlet temp: 409 deg F @ turbo efficiency of 60%, I/C outlet temp:  118 deg F
Turbo outlet temp: 475 deg F @ turbo efficiency of 50%, I/C outlet temp:  131 deg F

Perhaps this is a backdoor way get at the operating conditions of the compressor??  In this case, if Dave's manifold temperature is 130 deg F, then his compressor is operating down around 50%
efficiency!!

Note:  The website seems to have incorrectly calculated pressure ratio at 3.01 instead of what I think should be 2.01.

Doug Dempsey

Here is a chart on this subject from Hugh Macinnis.

Paul Lamar
 
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