Hi, I have been a long time lurker in this forum. I have built countless 304ss turbo manifolds and I am finally ready to make one out of 321ss. I have a few questions.
What gauge piping are you guys using? 16 gauge?
Back purging with argon or flux?
304L or 321L flanges?

Lastly the manifold will come around the motor like the picture below. The manifold will obviously need to be braced. Now, should I make the runners come around the motor individually and then merge into the turbo flange or should I have them merge before then bring lets say a 2.25 or 2.5 pipe around to mate up with the turbo flange.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by t3t41.8tgti &raquo;</TD></TR><TR><TD CLASS="quote">Now, should I make the runners come around the motor individually and then merge into the turbo flange or should I have them merge before then bring lets say a 2.25 or 2.5 pipe around to mate up with the turbo flange.</TD></TR></TABLE>

I've wondered if keeping the runners separate for a longer distance before merging allows the exhaust pulses hitting the turbine wheel to be further spaced apart and more distinct, similar to the effect of a twin scroll turbine inlet.