X-Mozilla-Keys:                                                                                 
Jeff Spitzer wrote:

At 01:39 PM 8/11/99 -0700, you wrote:

Jeff Spitzer wrote:

Here's an update for all those interested in the monolithic stainless
manifolds.

snip....

3)  Running without a wastegate:
I did some modeling last night and found some good news and some bad news.
The T04 turbo with the H trim compressor looks just right for my stated
goals.

snips............


Jeff I can't find an "H" trim in the Turbonetics catalog.
What are the exducer and major diameters?

Do you have a compressor map for that trim you can upload?
I see things like N, O, P & Q trims.

On TO4E big shaft I see compressor trims of 40,46,50,54,57,& 60.

What are the inducer and major diameters?

For the 50 trim it is 2.122 and 3.000 respectively.

Is that the big shaft or the standard shaft size?

"H" is the compressor trim.  The ones you cite above are all turbine sizes
(N,O,P,Q).  The T04B compressor maps in my turbonetics catalog are S-3,
V1/V2, and H-3.  The last one is what I was referring to.  The turbine of
choice for the 13B is "P". 

The A/R for the turbine housing will be the
biggest you can get unless transients are of concern (like a car).  PY told
me off-line that the biggest A/R he could get from TN (for the "P" turbine)
was 1.30.  They may have bigger now.  

For T4 tangential undivided in the 1999 catalog it is 1.71 for a P trim.

The T04E stuff is better (more
efficient) but more expensive.  To me the cost is not justified since we're
wastegating anyway.

Jeff Spitzer

What is the date on the front of your catalog?
OK I see it in the 1998 catalog. Opps! Look at that.. here it
is in the 1999 as well.

The TO4E 50 trim is somewhat more efficient (lower heating for given
pressure ratio) at 35 pounds/hour and 2.0 with the same upper RPM limit.
It also appears to be somewhat more surge tolerant.

Part number 10669 TO4E is the same price as the TO4B super.
or $728. + $100 for permacoat and polished :-)
Ceramic BB's are $243 extra.

We are "wastegating" anyway?    Is this something new?

How do you feel about the liquid cooled bearing housing?

What are the advantages and disadvantages of the "on center"
turbine housings?

Paul Lamar
 
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