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Tech Forum : Turbo

- BMW E21 Community
   - Tech Forum
      - Turbo
  Posted Thursday, Jun 26th 11:47am [Edit] [Quote] [IMS] [View car]

Post nr. 72


Does anyone know how these guys got the primaries as one piece?


  Posted Thursday, Jun 26th 6:57pm [Edit] [Quote] [IMS] [View car]

Post nr. 11


Look carefully they aren't one piece, go to www.burnsstainless.com
for mandrel bent tube.

I believe your thinking of welding to the stock exhaust manifold, this will be unsuccessful and will lead to headaches later.

  Posted Thursday, Jun 26th 8:22pm [Edit] [Quote] [IMS] [View car]

Post nr. 72


Getting an extra thick flange is possible. Modifying your stock manifold would most likely end up in disaster. Do you weld often? Making a turbo header or manifold like Paul did is probably one of the most time consuming and difficult things to do.
Weld a section, check for holes, grind out the inside of the weld. It's like cleaning the ports on a head 30 some odd times. I'd probably go with a log style manifold if it is your first try at welding exhaust stuff.

  Posted Friday, Jun 27th 12:36am [Edit] [Quote] [IMS] [View car]

Post nr. 75


The adaptor will be .5" , is that thick enough?
What kind of problems, besides the actual welding, do you expect me to encounter?

  Posted Friday, Jun 27th 12:59am [Edit] [Quote] [IMS] [View car]

Post nr. 81


I've posted this place a bunch:
http://www.jgstools.com/turbo/

They have cheap log style manifolds that you make and have them weld, mail order.

Welding is fun. Not really a headache.

  Posted Friday, Jun 27th 2:10am [Edit] [Quote] [IMS] [View car]

Post nr. 12


Matt,
Tuning will be your biggest hurdle, slightly wrong and you will have extremely high exhaust gas temperatures (EGT) under boost, which will destroy pretty near any manifold you can build/buy. Too much boost, incorrectly sized turbocharger, slipping clutches, worn out rear tires , grenading differentials...not an easy journey. Everytime I see a 930 turbo I stare in awe, amazing they ran those things in 24 hour races.


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