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Re: Boost problems solved
- To: quattro <firstname.lastname@example.org>
- Subject: Re: Boost problems solved
- From: Dave Lawson <email@example.com>
- Date: Wed, 31 Aug 94 10:25:00 mdt
- Encoding: 52 TEXT
- Reply-To: quattro
- Sender: quattro-owner
>I wonder if there were any mods to other components of computers besides
I have performed an electrical modification to the computer of my TQC where
you adjust the voltage coming from the manifold pressure sensor. We just
subtracted off a constant voltage from the input signal. It worked pretty
well and acted like the 'correct' modification you describe below (maintain
the protective featiures of the EOM computer, raise the acceptable boost
level before cut-off, increase ignition advance and reduce retard as a
function of boost).
>Anyone ever dump one of the Intended Acceleration PROMs?
I have looked at the code from a couple of stock computers, and a few
aftermarket ones, but haven't seen an IA box.
>On the bleeder valves, this is really a kludge. A stiffer WG spring and/or
>adding external adjustability is the "right" way to raise boost.
I wouldn't classify adjustable boost pressure regulator valves, aka bleeder
valves, as a kludge. I think this is a viable way of increasing boost
pressure. They can be used in two ways, altering the control pressure that
the wastegate receives, ie bleeding off boost pressure, or for applying
regulated boost pressure to the top side of the wastgate housing where the
wastegate spring is located(similar to what a stiffer spring does).
This type of valve has been used to increase boost pressure on 911 turbos
and it was also available from Abt(I know this isn't saying much) as a
method to increase boost pressure on TQCs.
>IA claims to maintain the protective featiures of the EOM computer,
>raise the acceptable boost level before cut-off, increase ignition advance
>and reduce retard as a function of boost, as well as suppling a new,
>stiffer WG spring and also making the WG externally adjustable, or at
>least providing instruction on how to do so. Perhaps you get what you
I tend to think that Ned knows what he is doing, his mods work and are
reliable. Glen can attest to that. How many miles have you put on your TQC
with the IA computer?
How much variablity(new word?) do you get by making the wastegate externally
adjustable? From what I hear, you just drill out the cap on the top of the
wastegate and expose a screw/bolt head which you can turn?
Dave Lawson firstname.lastname@example.org