Paul, here is a mock up of the proposed system with 22 inch runners,
butterfly to bell mouth. It can be fitted under my cowl but it
certainly will not fit under all cowls. Can we lower the height by
using two 90ºs instead of the 180º? Bend radius of the 180 is 3
inches. Bend radius of the 90º is 2 inches. Instead of butt
welding
the 90ºs which might cause roughness inside, a sleeve could slipped
over the joint and then welded. Or I can practice my butt welding
on
this material until I get dialed in to the point where the interior
walls remain smooth. Or we can join the two pieces with a rubber
hose
as we are doing elsewhere in the runner. It is important to me
to
be able to fit this system under any cowl. Jerry
Three inch centerline is about the best you can do in 3 inch thin
wall
tubing
90 or 180 degree bends.
You could tilt the tubes to lower the height. There are some other
ideas
I will work on such as a sharper radius 180 degree bend casting
typically
used in turbo charger plumbing.
Paul Lamar
If both runners are leaned toward the bell housing, the overall
height can be reduced more than if they are leaned toward each other.
Looks like the height would be approx 3 inches. A casting would
be
wonderful! Jerry Jerry
You want to lean them back, not forward, as the cowl is always higher
towards
the back. Here is a 3D view of 3 engines in various tilts.
No casting necessary.
Paul Lamar
This looks good to me. It is fun to be part of the creative process
even when I am just a spectator. Would heavy wall 2.50 o.d. chamfered
with both i.d. and o.d. matched to the runner serve as a bell mouth?
Or what do you suggest? Jrery
There is probably no way around machining them or spinning them on
a lathe out of 2 inch soft tubing. They can also be bought.
Paul Lamar
Jerry. You could weld 2 rings 1\4"-3\8" thick on to the box wall and then
radius the aluminum with a router before assembling the box. Be careful when
using a router with aluminum.
Bill Hyde
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