Jerry Hey wrote:

I just got the exhaust flange from Mazda Tricks.  The ports are
2.120" diameter.  This causes a .060 gap around the perimeter of the
two inch o.d. exhaust tubes.  Should I ignore this and just weld
across the gap or should I have the end of the tubes expanded for a
tight fit prior to welding.  Maybe there is a reason (expansion?)
for the sloppy fit.    ---Jerry

I would check with Dave Lemon at Mazdatrix on this Jerry. Find out
what they had in mind.

Paul Lamar

Here is the "trick" from Mazda Tricks.  The ports are oversized to
facilitate fitting.  The recommended procedure is to insert the
exhaust tube into the flange so that it is 1/8" short of the back
side.  Weld around  outside.  Then weld around the inside,  The
interior weld bead should be smooth --grind if necessary.  Jerry

What wall thickness SS tubing are you using Jerry?

Paul Lamar

I am using .065 304 SS through out. (Six port with exhaust splitters)
I might add that  I tried W.R. Wagner and probably 20 other venders
and was able to buy nothing.

Really? What did you say to them? Did you say aircraft?
I bought a whole box of aluminum bends from them. They may not
have .065 SS. It think the SS bends that Ed bought from
R.B. Wagner were .187 thick. PL

Stainless Steel Specialities in
Sebastian Florida is a muffler shop that has all the sizes of SS
tubing from 5/16" to 6" at very good prices.  The only problem is
that they will not sell less than 4 foot lengths.    Still, they
would sell me 4 foot of 4"  a lot cheaper than Tube Sales  would sell
one foot.  Try $18.00 per foot vs. $105.00 per foot!!  They wanted to
build the exhaust system for me.  They said they could deliver it for
less that I would spend buying  the four foot lengths.  They could
build a pile of Tangentials if someone could get the order together.
--Jerry

Interesting. Got a phone number or URL for them?

Paul Lamar

Hi Paul, here is the link:
http://www.stainless-specialties.com/

Bulent

 
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