turbo modification

[Pat Dooley]

IMO, the turbo is so small for your application that it will operate way out
of its efficiency range.  That will create very high outlet temps.  A larger
turbo at higher boost pressure would probably run cooler.
I would recommend a T3 from a Thunderbird turbocoupe or Merkur Xr4ti.
  -----Original Message-----
  From: quattro-admin at audifans.com [mailto:quattro-admin at audifans.com]On
Behalf Of alan pritchard
  Sent: Saturday, October 27, 2001 1:11 PM
  To: quattro at audifans.com; Adam Queripel
  Subject: turbo modification


  I found a turbo in the scrapyard today, seems in good condition,  it has
an integral wastegate and it is a garret.  it came off of a mg metro turbo
(1275cc)  so im hoping it will be the basis for my lightly blown coupe
gt(t).

  I have a few questions though, obviously this turbo assembly is designed
to produce approx 5-7 psi at peak revs ,  i guess 4500 ish from a 1275 cc
engine.  Obviously this turbo will spin up quicker as my engine is 2144cc,
and the wastgate will also open earlier, so what effect will running the
turbo with the wastegate open from lower revs have?  will it be possible to
run the turbo too fast and cause damage?  also the cfm for the turbo will be
much lower than an equivalent factory fitted turbo, therefore i will have
lower boost, but will this cause the engine to suffocate???
  hopefully with this amount of low boost i will not require an intercooler,
but will have to stop the airbox from inflating/ leaking, fabricate a
manifold and downpipe adaptor, also do something with the pipe that goes
from the manifold to the metering head,  but will my current fuel regulator
compensate for positive manifold pressure (ke engine , k jet) or would i be
best to make a pcb to drive the 6th injector?
  whats everyones opinion on not doing it the audi way?
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