Flywheel and black tube

[Horst Apfelthaler <Horst.Apfelthaler@xxxxxxxxxxx>]

Hello,
these are two questions to the small block gurus:

I'm currently planning to do an e to i upgrade with all parts (head,
manifold, harness, ecu, ...) from 
an 325i E30 for my euro eta (11:1 CR).

- - Which flywheel should I use? The original eta flywheel has 10.4kg, I ran
already a 8.4kg flywheel
  from an i engine. In the meantime I got a 6.2kg flywheel from an 323i E21.
  Should I use the 6.2kg thing, or will I have troubles?

- - The other thing that confuses me is a black tube (it is not the fuel
filter) with 3" diameter and 10" long 
  with 2 small hose connectors (same size like fuel lines).
  one is connected to an electrical valve comming from the intake manifold,
the other connector is going
  with a fuel hose to the back of the car (maybe fuel tank).
  What is this thing used for?


Regards

Horst from Austria

'80 323i project car with eta engine
'89 320iC
'95 A4 Tdi

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