Re: Boost problems solved

[Dave Lawson <dlawson@ball.com>]

Hi glen,

>I wonder if there were any mods to other components of computers besides
>the Hyperthech......

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
>pay for.....

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?

>-glen

 -
Dave Lawson  dlawson@ball.com