homemade 2.5" DP - page 1 - IDI Engine - VWDiesel.net The IDI, TDI, and mTDI source.

• homemade 2.5" DP by dankcorey22 on 23 Oct, 2010 20:29
• How hard is it to make a 2.5" DP? I know people has done it, but im wondering what angles and bends they used.
  Or what did they go by? The stock downpipe?
  
  its on a 1.6td
  
  Could someone tell me references to making one. i don't want to pay 300 for one.
• #1 by gribur on 23 Oct, 2010 20:35
• I have a 1.9td and am definitely interested in any info out there.  No way I can cough up that much cash either.  Someone please give out some info, you could save us all a ton of cash. cheers guys!
• #2 by Vincent Waldon on 23 Oct, 2010 20:54
• A mandrel-bent j-bend and away you go:
  
  http://www.vwdiesel.net/forum/index.php?topic=14003.0
• #3 by KinseyJ on 24 Oct, 2010 01:38
• I think i spent about 75 buck for some mandrel bents online, my downpipe was a little bit more complicated cause i had a g60 intake manifold and i flipped my turbo and exhaust maifold upside down, so it came out on the other side and had to clear my rear motor mount. if you can get your hands on a wire feed welder and a metel chop saw you will be set. took me one evening to get mine all built. i would post pics but i'm not sure how. good luck
• #4 by Smokey Eddy on 24 Oct, 2010 02:34
• i used a 180 and a 90
  cut up the 180 to make it work. dont remember exactly what angles but you can figure it out pretty easily. then the 90 is to direct it backwards.
• #5 by dankcorey22 on 24 Oct, 2010 13:41
• i think the hardest part will be keeping clear of the shifting links or the transmission mount right?
• #6 by 81 vw pu on 24 Oct, 2010 18:23
• Here's a link for a mk1.
  
  http://www.vwdiesel.net/forum/index.php?topic=19113.msg143382#msg143382
• #7 by dankcorey22 on 24 Oct, 2010 18:48
• Quote from: 81 vw pu on 24 Oct, 2010 18:23

  Here's a link for a mk1.
  
  http://www.vwdiesel.net/forum/index.php?topic=19113.msg143382#msg143382
  

  
  
  Thats exactly what i needed! thanks man!
  
  I made my flange but i think i got some metal that was too thin:( after seeing what they used on theirs. I spent alot of time on it too. Wonder if i can buy just the flange already made to fit 2.5" pipe
• #8 by theman53 on 24 Oct, 2010 19:23
• http://weirtech.ca/catalog/product_info.php?cPath=13_28&products_id=178
• #9 by Smokey Eddy on 24 Oct, 2010 22:09
• The hardest part for me was making it with enough clearance for when the engine torques the pipe doesn't hit the underside of the car.
  its a tight squeeze with a power steering rack.
• #10 by dankcorey22 on 25 Oct, 2010 09:33
• Lucas that the wrong one. im talking about the flange on the turbine housing.
  
  And my car doesnt have power steering so im good with that!
• #11 by theman53 on 25 Oct, 2010 15:40
• Turbo Outlet???
  Scroll down in the link or click on VW on the side. They have what you need I am sure.
• #12 by dankcorey22 on 25 Oct, 2010 19:00
• oh yeah the K03 outlet. I just didnt scroll down far enough. thats pretty cheap! and cheap!
• #13 by R.O.R-2.0 on 26 Oct, 2010 09:35
• easiest way to build a downpipe on a mk1 car is to install a VNT on it, then there is only 2 90* bends needed, one directing the exhaust down, and one directing it back..
  
  (lol  )
• #14 by regcheeseman on 26 Oct, 2010 15:35
• Quote

  easiest way to build a downpipe on a mk1 car is to install a VNT on it, then there is only 2 90* bends needed,

  
  Where did you get the flange for the VNT?