what size U bend is normally used for a down pipe in a Van. - IDI Engine - VWDiesel.net The IDI, TDI, and mTDI source.

• what size U bend is normally used for a down pipe in a Van. by allsierra123 on 27 Apr, 2009 19:51
• The guy I was going to have build my downpipe isnt answering my emails. So I am going to figure it out on my own I realize I will need a U bend but not sure what size one to get. Dont want to spend a bunch of money on trial and error and am very new to the fabrication. Anyone have any experience with this?
• #1 by allsierra123 on 27 Apr, 2009 21:03
• well it was either use the stock bits or build a new one from scratch. I have found the k03/k04 outlet flange for a decent price so im thinking of picking it up. But so Im going to try the J bends and see what I can figure out maybe tack it together and take it in and have it done right.
• #2 by Luckypabst on 27 Apr, 2009 21:12
• I used a single 2.25" mandrel U-bend because that was the size of the turbine outlet on my K14. I think in hindsight I should have used 2.5" or even better - tried to find a quick, smooth transition from 2.25 to 2.5 and gone from there.
  
  ATP seems to have really good prices on stainless mandrel u-bends and flexy sections.
  
  Chris
• #3 by allsierra123 on 27 Apr, 2009 21:17
• Yeah I saw that I just ordered the outlet flange. So Now I need to decide how big I wanna make it.
• #4 by allsierra123 on 27 Apr, 2009 21:22
• although now that I look at it the K03/K04 flange looks nothing like the one on my AAZ k03???