X-Mozilla-Keys:                                                                                 
Jeff Spitzer wrote:

At 03:40 PM 8/11/99 -0700, you wrote:

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

Yes, that is listed but do they *have* it?  I've not called to find out.

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?

New as of the post from which this thread originated.  The turbine housings
aren't big enough to run without some sort of "boost control"

How do you feel about the liquid cooled bearing housing?

A necessity.

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

I believe the "on center" turbine housings are less efficient.  Again, if
you're wastegating anyway who cares.  It may be easier to machine in a
fixed orifice bypass in an on-center housing.  This is something I intend
to look into in the next couple days.

Jeff Spitzer

 
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