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Well, as some of you may or may not know, I personally have been
working on 10vt headers for some time now. So, I think it is time that I
stepped in and made a few comments. Also, you are going to have to
forgive me if I am realativly vague on the specifics. There are just
certain bits of info that I CAN NOT release untill they are done (or
close to being done). I would be happy to answer questions, but please
bear with me if I am not specific.
For openers, I have met and talked to mike at Mountain Auto (met him at
Pikes Peak about 4 years ago). He is a very compitant individual and I'll
bet he could make the headers. I have used some of products and they work
great, but there is a lot involved in making these things and as it has
taken me, it will take him some time. So, I wouldn't hold my breath in
anticiption for it.
So far I have gone through 3 prototypes BEFORE I even got one on the
car. Between myself and the gentleman that I have doing my TIG welding,
we have about 40-50 hours/each into everyone. On the flow bench, they flow
MUCH better, but that has nothing to do with actual real world
experience. I am very pleased with the way they are turning out, but
actual production is yet to be seen. I just don't know if it is viable to
make them for the general public (yet).
The first problem that must be delt with is: placement of the flanges.
The first one we built was a disaster! It moved around so much, that a
completely new exhaust would have had to be built to compensate for all
the movement of the flanges. So, we had to come up with a way to keep all
the flanges in place while it was being welded. After that was
compensated for, they came out great. Trust me on this one, just bolting
the 5 port flanges up to the head is NOT enough.
After that we had to deal with cost (and this is where I must make a
comment on Mountain Auto's figures for a SS system). I have delt with
many distributors over the years for Mandrel Bends and I am pretty sure
that I am dealing with a company that has the best prices inthe country
and they have one of the best selections around. I am not a liberty to
say how much I am paying for the bends, but it is not expensive. The
problem I have with Mike's figures is that there is no way that SS is
only going to cost $200 more than Mild Steel. I can tell you that "my
cost" is over 4 times more than steel. Also, the selection just isn't
there either. To make these things, I need about 4 different U bends that
all have different radius and 2 different 90 degree bends, again with
different radius's. There just isn't that kind of selection availble in
SS. Actaully, let me correct myself, they are available, but one would
have to deal with several distributors or have them custom bent by
someone that has a mandrel bender.
While we are on the subject of the different metals....There is NO WAY
that a 10vt header will survive unless it is SS. Basically, it must be
made out of SS or you will not get any kind of life out of it. My
prototypes are made out of mild steel, but that was just for the
"prototype" stage. I truely belive that if they were to be made out
steel, they will turn into dust and blow away. Even with SS, I am not
sure that longevity is going to be one of it's strong suits. As Scott
said, there just isn't enough length between the head and the turbo to
release heat in any kind of effective way.
More than likely, there will be final "production" SS example on my car
at the Stapleton event. At that point (after I have sucsessfully made it
through that weekend), I should know more about it and what I can expect
from it and if it is viable for sale.
Well, a couple people (that knew I was doing this) asked me to post a
mesage to the list, so here it is. For such a large project, I realize
that this is a short message, but that is about as detailed as I would
like to get at this point. Questions will be answered, but please don't
take offense if I don't get right to the point on the answers.
82' RX-7 GS