I have been looking to upgrade my stock '91 Turbo.  One company says they can
replace the compressor section with a 46 trim T04E for about $400.  This
would be nice because it is a cheap upgrade and I can still use the stock
exhaust manifold. The problem is, I'm not sure how much of an upgrade this
really is.  Can anyone make a guess at the percentage of increased flow this
would give me at high rmp?  Does this compressor represent a reasonable
upgrade over the stock compressor?

Dave Leonard

I don't think boost is going to be our problem Dave. I am worried about over speeding
the turbine. I will implement a RPM sensor on the compressor side of some sort
on mine.

Also while you are inquiring please find out if there is a Inconel turbine wheel available
that will fit the stock housing. Rumor has it the stock turbo can be retrofitted
with TO3 parts. Obviously even TO4 compressor parts fit. One of my projects I
have been meaning to get around to.

The other big question mark in my mind is; will that small built in waste gate be adequate?
I think boost will be the least of our problems. Not unless of course you are looking
for 700 HP :-)

Paul Lamar
 
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