Wastegate springs values-[5kT]

[Nick Stuart]

I've had a different experince with the wastegate spring. My brother had put
one in, and not only does it let the boost build up quicker, but I know also
get 1.7-1.8 max boost. Dont know why it changes but it does. Anyway the only
other thing he did was to permentantly ground the fuel pump so it doesn't
have the saftey shut-off, but I think he did that for another reason.
Granted this isn't the recommended setup but it works.
The problem with this setup and not modifying the ECU is that at max boost
it doesn't know what to do with the fuel, so it has a slight hesitation to
it, but is barely noticeable.
I believe he got the spring from Blau.

Nick Stuart
875kcstq

> --- Tim Sexton <5kcstq at codenet.net> wrote:
> > Dennis,
> >     It doesn't actually increase the amount of boost.  It just
> > helps to keep the
> > wastegate from cracking open early, giving the result of
> > quicker boost buildup.
> > On my 87 5kcstq, it didn't raise the boost at all, it just
> > enabled the car to run
> > factory boost amounts, 1.4bar, at a lower rpm level.  It isn't
> > detrimental to the
> > car, since all of the factory safety features are still
> > enabled and the boost
> > wasn't actually increased.
> >     Yes,  adding more tension on the spring results in boost
> > being built faster.
> > But, like I said,  it won't change the basic value of the
> > spring.
> >     It was actually an outstanding mod for me because of the
> > altitude at which I
> > live.  It gave the car a whole different personality....  Of
> > course so did the
> > recent S.Knob installation, but that's a whole different ball
> > game.
> >
> > Hope that helps to clarify.
> >
> > Tim Sexton
> >
> > Colorado Springs
> >
> > 91 V8 5speed
> > 87 5kcstq, adjustable w-gate, S.Knob, 2.0bar
> > 94 90cs quattro sport
> >
> > DGraber460 at aol.com wrote:
> >
> > > Great post. Thanks.
> > > For us turbo challenged folks, what are the ramifications of
> > this mod? Do you
> > > have to change anything else (e.g., ECU) to prevent nasty
> > things form
> > > happening? Is getting the spring back into the same (or
> > close) tension
> > > critical.
> > > I'm assuming more compression on the spring gives more
> > boost?
> > > Sounds easy, and inexpensive, causing my right brain to wave
> > a red flag of
> > > caution.
> > > Since I have a spare wastegate, I want give this a shot.
> > > TIA
> > >
> > > Dennis
> > > 83 URQ
> >
>
>
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