I have always used the 75/25 for Mild and SS.On Aluminum GMAW I use 99% Ar & a wiff off Helium to "get the heat moving",if you take my meaning.
-G-

hmm my dad has a 75 25 tank for his mild wire MIG, i should try it before i give up on mig forever. Thanks. :)

My "bounding box" is basically a box that has the dimensions of the space I have to work with.

Also, you want the CO2 for penetration. I take it you didn't get full pen with just argon?

Here's a closer design. The goddamn gasket still hasn't shown up. I'm going to see if I can get it local because I'm tired of waiting for it...

In this one, the runner spacing is close, but still not there. 1/4 are too short now...

Here's design 4.
This one 1/4 are a little longer then 2/3, by only about 1.5inches. If my port spacing is too far apart I can make the difference even smaller with this design.

The problem is it might be too close to the PS. I can move this design easily farther from the motor, and put the turbo where the airbox was. The thing is I think by then the "candy cane" bends to add length may end up being redundant. I need to get the measurements to see where it would put it.

If the turbo inlet ends up with the center between the PS and A/C it'd be real easy to run a cold air intake tube.

I'm not going to do anything more until I get the header gasket (and double check my port spacing).

Is that from Dave Chappelle?

[/I]

Remember that you have to still make this thing,too sinuous of a design will require you use dozens of El's ground/cut to fit.With that being said,keep up the good work.So I can steal your design.:laugh:

The last one is actually (if each runner laid flat) a 45, a 90, then another 45, followed by straight tube.

NOW we're talking:)
Looks great

Those runners merging at such steep angles will have a dramatic effect on flow. You want a radial style 4-1 collector. Try something like this

http://i37.tinypic.com/2hi001k.jpg

You could search for BP head flange. There's a CAD file here somewhere I saw recently. I was going to post a .pdf of the Weirtec flange I measured until I saw that one already posted.

Yep.