Boost

[Dave Zug]

The throttle has to be sufficiently closed before the power drops off, the
turbo wont slow down until the power drops off, therefore for a moment its
still a bit positive and you hear this gawd awful noise that sounds like a
raptor in heat, as the turbo slows to unusable RPMs rapidly.  Power shifting
a turbo may make lots (150,000+) rpm's in the turbo and undesirable heat and
stress but I suppose its done. I never had a blow off but I had an
automatic... best IMO for turbo apps.

----- Original Message -----
From: Bob Wooten <r71chevy at earthlink.net>
To: <gmecm at diy-efi.org>
Sent: Saturday, December 02, 2000 7:32 PM
Subject: Re: Boost


> do you mean that w/no backpressure the turbo is spooling even though the
> throttle is closed?  & then when the trottle is hammered back on & the
> clutch let out that it is still spooled up?  does no-one that drives a
> turbo power shift?
>
> BW
>
>
> > [Original Message]
> > From: Jeremy Gonyou <jgonyou at hotmail.com>
> > To: <gmecm at diy-efi.org>
> > Date: 12/2/00 2:44:43 PM
> > Subject: Re: Boost
> >
> >
> > >A blow off valve is to bleed air from the compressor spike when you
slam
> > >the throttle body shut. It's supposed to stop you from damaging your
> turbo.
> > >However, in talking with people who build turbos and have been in the
> > >industry for a very long time, it's their feelings that the blow off
> valves
> > >available to people like us don't really serve that purpose because
they
> > >react too slow.
> >
> > I think that the real reason people want them is for the improved
> throttle
> > response between shifts.  The idea is that with a blow off valve your
> turbo
> > is free to spool with the throttle closed and you have your boost
> availabe
> > when you let out the clutch.  Kinda like toyota's cool bang-bang system
:)
> >
> > Jeremy
> >
>
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>
>
>
> --- Bob Wooten
> --- r71chevy at earthlink.net
> --- 71-91 Camaro
>
>
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