e30 m50 turbo manifold help!

[Rowleym]

Also, Do you use a stainless manifold flange?

[Rowleym]

sweet. Thanks guys. Now that I have the manifold material, does anyone have anything to say about a log manifold?

[Good & Tight]

1 1/4" schedule 10 piping is what I use for manifolds, you can get them at Ace stainless.

[Ginsterman98]

Sch 10 stainless 304 pipe should do the trick. Tubing will be to thin and prone to cracks, use pipe.
this might help you out.

http://www.mcmaster.com/#stainless-steel-(schedule-10)-pipe-fittings/=kgcvkf

[Rowleym]

So.. instead of spending like 500+ on a decent manifold, I would like to make my own for the experience of it. Yes I do have a tig welder and argon purging, yes I have all the proper tools, blah blah. I was just wondering what sized ID tubing I should use? Anyone have a log manifold on a turbo m50 e30? I think it would be great for the transient(Sp?) response because this car is going to be drifted and sometimes on the track. Power goals are around 400bhp and Im using a Holset Hx40 with a 16cm housing. thanks