Date: Tue, 14 May 2002 14:06:53 +0100
From: "Andrew Hookins" <andrew.hookinsnopsamamnopsamodata.co.uk>
Subject: Re: My dealer hasn't got a clue, can you help? ('97 9000 Aero, Manual)
Fred,
Lee is experiencing fuel cut-off at high boost pressure so
yes this is a genuine overboost problem.
Lee,
I'm almost out of ideas know, but maybe this is a transient
spiking problem. Grasping at straws here, but maybe a
clogged cat/exhaust could cause odd spool up. Ed Abbot
of Abbot Racing explained to me a condition that can occur
when there is high backpressure between exhaust port and
turbo and/or a weak spring in the wastegate actuator. The
net result was a fast build up of boost pressure then boost
pressure dropping back down as the spring in the wastegate
actuator worked. I didn't fully understand but maybe a call
to Abbot Racing may help, I've found them to be happy to
help in the past. To save you looking them up, their phone
number is 01255 870636.
AndyH
"Fred Wills" <FredWillsnopsamphia.net> wrote in message
news:Qm7E8.6043$Ok3.3240500nopsam1.news.adelphia.net...
> I've been following this thread and don't think anyone has bothered to ask
> the obvious question: Are you *sure* you have an overboost problem? On
my
> 92 9000T (200HP) the Boost gauge goes about 1/2 way into the red on
> acceleration with no modifications to the APC. I would envision that an
> Aero would go even further to develop the additional horsepower (220HP?)
> with the same mill.
>
> Where is the boost gauge needle at idle? Gentle acceleration? Full
> acceleration?
>
>
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