You better start by adding another exhaust  pipe over the waste gate and
opening
it up to allow the waste gate to open to 90%. Then get in there
and port those waste gate holes. Then ask around down there in south Florida
and see if you can find someone to add a larger compressor to your stock
turbo.

Paul Lamar.

I already have an extra waste gate cover plate to bore out the hole for the
second pipe. I like the idea on a bigger compressor, but my wallet doesn't
:) I'll see what I can do.
I did cut-off the injector casing part on the middle runners and moved them
to the existing mounts on the engine block. You see the rest.
Bulent

Also bore those waste gate holes out a bit. If they are .75 inches take take them
out to .8 inches which will increase the area by 14%. The biggest problem
with the stock turbo is it was designed to work against back pressure
in a muffler and only designed for 210 HP. So the turbine is overdriving
the compressor. Without the muffler it is generating 230 HP at sea level
but very very inefficiently. That means it is over heating the intake air
so an intercooler is absolutely essential or you will blow the apex seals
with detonation.  It is also over speeding at high altitude which is the 
main reason it is failing.  So you need to limit the boost at high altitude 
to 30 Hg inches of manifold pressure. You will still go faster than a NA engine
at altitude. At low altitude you could maybe run it at 35 Hg inches or so
for short periods.

The cheapest way to make this thing work is be absolutely sure the modified waste
gate is 200% more effective than the stock waste gate.

If you want more power at high altitude you are going to need to change
the compressor.

The stock turbo has a lot going for it not the least of which is the compact and
light weight exhaust manifold. The built in waste gate is another. It
is also lighter than a TO4. Particularly when you add in the weight of 
an external waste gate. The turbine is generating plenty of HP. Too much in fact.
It is an ideal candidate for a turbo compound application.
In other words if we could get some of that excess HP out of the turbine
and feed it back into the e-shaft the turbine would slow down.

Paul Lamar
 
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