How to cut this merge collector?

[2uzgte]

I'm having trouble cutting this merge collector, maybe someone can help.

I have very tight spacial constraints and because of other factors with the turbo setup, I have to stick to them with this project. I have 1.75" primaries and the center tube in the picture (number 2) is limited to 3" long. I need to merge cylinders 1 and 3 into tube 2 in a splayed fashion, and I'd like to do so at around a 45 degree angle. I tried a few geometry calculations, but I'm doing something wrong. I spent a day making a jig for my bandsaw that keeps the piping true the entire way through the cut (sans the blade deflection) so if I can get the measurements/angles down correctly, I can get this cut and tacked.

Based on the pictures, can anyone give me some angles? I know it has to total 360 degrees and the manifold flange outlet is circular, are my angles wrong?

I'm not sure how to calculate the width of the remaining front fascia of the pipe, based on the angles either? Does anyone have a formula for this?

Thanks for reading.


http://img829.imageshack.us/img829/7...collector1.jpg