----- Original Message -----
Sent: Tuesday, October 07, 2003 10:37
PM
Subject: [FlyRotary] More stock turbo
blues
Greetings,
I bet if you looked in
the archives, you'd see that I recently said the stock Mazda turbo could take
the heat. Well, I'm sorry to say that I no longer believe that.
I just dissected a "low
mileage" Series 5 turbo, and found that it was crack city inside. Man,
there isn't a single area of the high temp side of the housing that doesn't
have some sort of crack. All of these are hidden from external view, so
the one on my plane now is likely cracked in just the same way. The
latest exhaust manifold that I got from Ebay is also cracked, despite the "no
cracks" advertisement. Even with the crack, it's way better than the one
I currently have installed. Sigh...
I have now decided, that
the stock turbo is not going to stay on my plane for the rev-2 cowl. The
wastegate sucks, and turbo just isn't high enough quality. It's one
thing to run around in a car with cracked parts, but not in the
plane.
What does this
mean? Good question. I don't know yet. I don't
"need" the turbo, but I "want" it, so I'm going to look into an aftermarket
turbo. This one would be properly sized, have a stainless
exhaust manifold, and usable wastegate. Why do I do these
things to myself... If I come to my senses somewhere along the
line, I'll be going NA, and still having more power than I need for an
RV-3. I'd have to attend the EDKILL lecture though
:-)
Rusty (my kingdom for a
turbo that isn't cracked!)
Hey
Rusty,
If any of us had come to our senses, we wouldn't be exchanging these e mails
{:>). I mean what fun is it going through life "Sane". Trust me,
stick with the turbo, you wouldn't want to sit throught the presentation -
because for you, it'll have to be twice {:>)
I am pretty
sure I am going to get the DRO before all is said and done - but maybe that's
my next Christmas present {:>). I've got the ShopMaster all
assembled now, but still have not turned on the power. A guy with a
ShopMaster has a web site where there is some good advise on how to set
it up and check it out. I am still wading through the tool manual to
figure out what does what. The more I get into it the more I like what I
see. The manual sucks cosmetically, but seems to cover the important
things. I need to finish cleaning off the shipping grease and get some
quill oil (never knew they made such a thing {:>)). It comes ready to
run, but several folks recommended draining the oil and thoroughly cleaning
out the gear box just to make certain there is no debris.
The tail stock has
a neat feature in that you can connect it to follow behind the milling
platform as it is automatically fed/moves or disconnect it so it stays in one
place. Sort of neat. The Mill head unlocks from its mill mode to
provide a drill capability that is as simple as pulling on a knob. It
has automatic depth Z and X axis stops, it may have Y stops as well, but
I haven't gotten that far yet. What initially surprised me is that it
also has automatic feed for the Y axis as well. I guess you would need
that if its a CNC capable machine. So looks like automatic feed in X,Y
and Z axis. I'm sure I'll run into some frustrating limitation when I
start to use it, but so far it looks like money well
spent.
Ed