legacycentral bbs

Hi,

Sorry I know this subject has been thrashed out overtime here but I
just want to clear a few things up for myself. (must be a little
slow!?)

Anyway Installed my boost guage over the weekend, working well happy
with that.

Now I want to increase the boost a little as well. I've hunted out
and found a couple of good articles, the best appearing to be on
autospeed.com as to the Audi DIY boost control.

So just to be sure I have the application correct for the RS, I
wanted to clarify things. OK I would want to T the bleed valve into
the same line as the boost guage is T'ed off from. This is the line
that runs from the Manifold and I belive it goes to the boost control
solinoid?. I've seen mixed application some people have run this line
straight from the minifold to the turbo and the bleed valve used and
totally bypassing the solinoid, just capping its end. Which would
suit best?

Next I'd want to T a pressure relief valve into the line that runs
from the boost control solinoid to the wastegate.

Hope this is correct.

Last question is the conversion of 1 bar to PSI? I've heard the MAX
boost I'd want to run is 13psi, my guage is in Bar, and I've heard
mixed things as to the conversion from 1B=14.5psi to 16psi. any
comments would be great.

Thanks again.
Quin




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AFAIK, 14.5PSI = 1BAR.

--- In BC-BFLegacyWorks@y..., quin@t... wrote:
> Hi,
>
> Sorry I know this subject has been thrashed out overtime here but I
> just want to clear a few things up for myself. (must be a little
> slow!?)
>
> Anyway Installed my boost guage over the weekend, working well
happy
> with that.
>
> Now I want to increase the boost a little as well. I've hunted out
> and found a couple of good articles, the best appearing to be on
> autospeed.com as to the Audi DIY boost control.
>
> So just to be sure I have the application correct for the RS, I
> wanted to clarify things. OK I would want to T the bleed valve into
> the same line as the boost guage is T'ed off from. This is the line
> that runs from the Manifold and I belive it goes to the boost
control
> solinoid?. I've seen mixed application some people have run this
line
> straight from the minifold to the turbo and the bleed valve used
and
> totally bypassing the solinoid, just capping its end. Which would
> suit best?
>
> Next I'd want to T a pressure relief valve into the line that runs
> from the boost control solinoid to the wastegate.
>
> Hope this is correct.
>
> Last question is the conversion of 1 bar to PSI? I've heard the MAX
> boost I'd want to run is 13psi, my guage is in Bar, and I've heard
> mixed things as to the conversion from 1B=14.5psi to 16psi. any
> comments would be great.
>
> Thanks again.
> Quin


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BC-BFLegacyWorks-unsubscribe@egroups.com

Restrictor's
Why use one? Well, if you don't use one, when you try to drop
pressure in a line you'll have to bleed out SO MUCH air that you'll
be hard pressed to make a large pressure drop in the line.
Where does the restrictor go? In between the source of pressure (like
the intake manifold) and the bleed hole (or bleed valve).

Restrictor Diagram http://groups.yahoo.com/group/BC-
BFLegacyWorks/files/restrictor.jpg

In the above illustration air molecules represented by dots are
leaving the intake manifold and heading for the actuator. Just as you
can make the actuator "see" less pressure than you're really running,
you can also make the MAP sensor see less pressure than you're
running. Same deal with the MAP line; orifice goes between the
pressure source and the bleed hole/valve.

You can use exactly the same style of setup for your MAP Sensor to
trick your computer into thinking you are running less boost.

Note: you also want to include a pressure switch in the circuit to
prevent overboost.

Over boost prevention diagram http://groups.yahoo.com/group/BC-
BFLegacyWorks/files/bleed2.jpg

Dan

--- In BC-BFLegacyWorks@y..., quin@t... wrote:
> Hi,
>
> Sorry I know this subject has been thrashed out overtime here but I
> just want to clear a few things up for myself. (must be a little
> slow!?)
>
> Anyway Installed my boost guage over the weekend, working well
happy
> with that.
>
> Now I want to increase the boost a little as well. I've hunted out
> and found a couple of good articles, the best appearing to be on
> autospeed.com as to the Audi DIY boost control.
>
> So just to be sure I have the application correct for the RS, I
> wanted to clarify things. OK I would want to T the bleed valve into
> the same line as the boost guage is T'ed off from. This is the line
> that runs from the Manifold and I belive it goes to the boost
control
> solinoid?. I've seen mixed application some people have run this
line
> straight from the minifold to the turbo and the bleed valve used
and
> totally bypassing the solinoid, just capping its end. Which would
> suit best?
>
> Next I'd want to T a pressure relief valve into the line that runs
> from the boost control solinoid to the wastegate.
>
> Hope this is correct.
>
> Last question is the conversion of 1 bar to PSI? I've heard the MAX
> boost I'd want to run is 13psi, my guage is in Bar, and I've heard
> mixed things as to the conversion from 1B=14.5psi to 16psi. any
> comments would be great.
>
> Thanks again.
> Quin


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BC-BFLegacyWorks-unsubscribe@egroups.com

Dan,

Thanks for the reply, I was hopping for something like this.

The restrictor diagrame makes good sense, and shows this well. OK if
I understand you right I want a strictor between the Manifold and the
Bleed valve. I haven't got any of the bits I'll be needing so what
sort of a restrictor should I be looking for? Also as a side question
do you know of anywere I can get the bits I'll need in NZ?

My new enlitenment spurs on a few more questions. I am assuming that
in my cars current standard form I have a pipe running from the
Manifold to the MAP sensor, which inturn has feeding pipes from the
Turbo and wastegate. SO > I know I now need a restrictor to run in
line before the bleed vavle.

OK new revised plan, from line that runs from the minfold to the MAP
I want to have at the manifold end a restrictor and then at the MAP
end a bleed vavle? correct? I hope so. This I can manage and feel
confident to do.

Next what about a regulator before the wastegate?, so that I can
control how much pressure the wastegate see's before opening. So I
could set the regualtor to open once say 10psi has built up in that
line. So then I would avoid wastegate creep, so when boost comes on
it will come on hard.

Now next the bleed2 diagrame, this looses me a little, I can't tell
what I should be adding/re-plumping and what stays. So I am guessing
in this diagrame I would be totally bypassing the current MAP? and
effectivly making my own? IF my above plan would work and do the job
of increasing how fast boost comes on and how high it will bosst,
what will the sugestion in bleed2 do extra, I'm guessing be safer?
but not sure, I've just got the RS and am looking to keep it so of
course want the best option here as well, so all you ideas are really
very appreciated, so if you have chance to answer any of these
questions I would be very appreciative.

Thanks
Quin





--- In BC-BFLegacyWorks@y..., daniel.wilson@d... wrote:
> Restrictor's
> Why use one? Well, if you don't use one, when you try to drop
> pressure in a line you'll have to bleed out SO MUCH air that you'll
> be hard pressed to make a large pressure drop in the line.
> Where does the restrictor go? In between the source of pressure
(like
> the intake manifold) and the bleed hole (or bleed valve).
>
> Restrictor Diagram http://groups.yahoo.com/group/BC-
> BFLegacyWorks/files/restrictor.jpg
>
> In the above illustration air molecules represented by dots are
> leaving the intake manifold and heading for the actuator. Just as
you
> can make the actuator "see" less pressure than you're really
running,
> you can also make the MAP sensor see less pressure than you're
> running. Same deal with the MAP line; orifice goes between the
> pressure source and the bleed hole/valve.
>
> You can use exactly the same style of setup for your MAP Sensor to
> trick your computer into thinking you are running less boost.
>
> Note: you also want to include a pressure switch in the circuit to
> prevent overboost.
>
> Over boost prevention diagram http://groups.yahoo.com/group/BC-
> BFLegacyWorks/files/bleed2.jpg
>
> Dan
>



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Where abouts in NZ are you?

--- In BC-BFLegacyWorks@y..., quin@t... wrote:
> Dan,
>
> Thanks for the reply, I was hopping for something like this.
>
> The restrictor diagrame makes good sense, and shows this well. OK
if
> I understand you right I want a strictor between the Manifold and
the
> Bleed valve. I haven't got any of the bits I'll be needing so what
> sort of a restrictor should I be looking for? Also as a side
question
> do you know of anywere I can get the bits I'll need in NZ?
>
> My new enlitenment spurs on a few more questions. I am assuming
that
> in my cars current standard form I have a pipe running from the
> Manifold to the MAP sensor, which inturn has feeding pipes from the
> Turbo and wastegate. SO > I know I now need a restrictor to run in
> line before the bleed vavle.
>
> OK new revised plan, from line that runs from the minfold to the
MAP
> I want to have at the manifold end a restrictor and then at the MAP
> end a bleed vavle? correct? I hope so. This I can manage and feel
> confident to do.
>
> Next what about a regulator before the wastegate?, so that I can
> control how much pressure the wastegate see's before opening. So I
> could set the regualtor to open once say 10psi has built up in that
> line. So then I would avoid wastegate creep, so when boost comes on
> it will come on hard.
>
> Now next the bleed2 diagrame, this looses me a little, I can't tell
> what I should be adding/re-plumping and what stays. So I am
guessing
> in this diagrame I would be totally bypassing the current MAP? and
> effectivly making my own? IF my above plan would work and do the
job
> of increasing how fast boost comes on and how high it will bosst,
> what will the sugestion in bleed2 do extra, I'm guessing be safer?
> but not sure, I've just got the RS and am looking to keep it so of
> course want the best option here as well, so all you ideas are
really
> very appreciated, so if you have chance to answer any of these
> questions I would be very appreciative.
>
> Thanks
> Quin
>
>
>
>
>
> --- In BC-BFLegacyWorks@y..., daniel.wilson@d... wrote:
> > Restrictor's
> > Why use one? Well, if you don't use one, when you try to drop
> > pressure in a line you'll have to bleed out SO MUCH air that
you'll
> > be hard pressed to make a large pressure drop in the line.
> > Where does the restrictor go? In between the source of pressure
> (like
> > the intake manifold) and the bleed hole (or bleed valve).
> >
> > Restrictor Diagram http://groups.yahoo.com/group/BC-
> > BFLegacyWorks/files/restrictor.jpg
> >
> > In the above illustration air molecules represented by dots are
> > leaving the intake manifold and heading for the actuator. Just as
> you
> > can make the actuator "see" less pressure than you're really
> running,
> > you can also make the MAP sensor see less pressure than you're
> > running. Same deal with the MAP line; orifice goes between the
> > pressure source and the bleed hole/valve.
> >
> > You can use exactly the same style of setup for your MAP Sensor
to
> > trick your computer into thinking you are running less boost.
> >
> > Note: you also want to include a pressure switch in the circuit
to
> > prevent overboost.
> >
> > Over boost prevention diagram http://groups.yahoo.com/group/BC-
> > BFLegacyWorks/files/bleed2.jpg
> >
> > Dan
> >


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Wellington.

--- In BC-BFLegacyWorks@y..., daniel.wilson@d... wrote:
> Where abouts in NZ are you?
>
> --- In BC-BFLegacyWorks@y..., quin@t... wrote:
> > Dan,
> >
> > Thanks for the reply, I was hopping for something like this.
> >
> > The restrictor diagrame makes good sense, and shows this well. OK
> if
> > I understand you right I want a strictor between the Manifold and
> the
> > Bleed valve. I haven't got any of the bits I'll be needing so
what
> > sort of a restrictor should I be looking for? Also as a side
> question
> > do you know of anywere I can get the bits I'll need in NZ?
> >
> > My new enlitenment spurs on a few more questions. I am assuming
> that
> > in my cars current standard form I have a pipe running from the
> > Manifold to the MAP sensor, which inturn has feeding pipes from
the
> > Turbo and wastegate. SO > I know I now need a restrictor to run
in
> > line before the bleed vavle.
> >
> > OK new revised plan, from line that runs from the minfold to the
> MAP
> > I want to have at the manifold end a restrictor and then at the
MAP
> > end a bleed vavle? correct? I hope so. This I can manage and feel
> > confident to do.
> >
> > Next what about a regulator before the wastegate?, so that I can
> > control how much pressure the wastegate see's before opening. So
I
> > could set the regualtor to open once say 10psi has built up in
that
> > line. So then I would avoid wastegate creep, so when boost comes
on
> > it will come on hard.
> >
> > Now next the bleed2 diagrame, this looses me a little, I can't
tell
> > what I should be adding/re-plumping and what stays. So I am
> guessing
> > in this diagrame I would be totally bypassing the current MAP?
and
> > effectivly making my own? IF my above plan would work and do the
> job
> > of increasing how fast boost comes on and how high it will bosst,
> > what will the sugestion in bleed2 do extra, I'm guessing be
safer?
> > but not sure, I've just got the RS and am looking to keep it so
of
> > course want the best option here as well, so all you ideas are
> really
> > very appreciated, so if you have chance to answer any of these
> > questions I would be very appreciative.
> >
> > Thanks
> > Quin
> >
> >
> >
> >
> >
> > --- In BC-BFLegacyWorks@y..., daniel.wilson@d... wrote:
> > > Restrictor's
> > > Why use one? Well, if you don't use one, when you try to drop
> > > pressure in a line you'll have to bleed out SO MUCH air that
> you'll
> > > be hard pressed to make a large pressure drop in the line.
> > > Where does the restrictor go? In between the source of pressure
> > (like
> > > the intake manifold) and the bleed hole (or bleed valve).
> > >
> > > Restrictor Diagram http://groups.yahoo.com/group/BC-
> > > BFLegacyWorks/files/restrictor.jpg
> > >
> > > In the above illustration air molecules represented by dots are
> > > leaving the intake manifold and heading for the actuator. Just
as
> > you
> > > can make the actuator "see" less pressure than you're really
> > running,
> > > you can also make the MAP sensor see less pressure than you're
> > > running. Same deal with the MAP line; orifice goes between the
> > > pressure source and the bleed hole/valve.
> > >
> > > You can use exactly the same style of setup for your MAP Sensor
> to
> > > trick your computer into thinking you are running less boost.
> > >
> > > Note: you also want to include a pressure switch in the circuit
> to
> > > prevent overboost.
> > >
> > > Over boost prevention diagram http://groups.yahoo.com/group/BC-
> > > BFLegacyWorks/files/bleed2.jpg
> > >
> > > Dan
> > >


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BC-BFLegacyWorks-unsubscribe@egroups.com

Restrictor size should be about 10 to 12mm or .040" to .050", if they
are too small the check engine light may come on so just increase the
size.

Yes the second digram only refers to, from the manifold to the
wastegate actuator.

Mitre 10 should have that sort of thing or mechanical/engineering
workshop.

Please note your factory computer will not allow you to run above
14.7 psi unless of course you bleed the line to the map sensor.
You should be able to run 15 psi on the stock setup, more than that
and you will have to add more fuel.

Do not attempt any of this unless you have a boost gauge or air/fuel
mixture gauge.

If you have no air/fuel gauge, run a wire from your O2 sensor wire
(the one that reads .1V-.9V at warm idle, bouncing up and down)
through the firewall, into the car. Hook the O2 wire to the red probe
of a digital voltmeter; hook the black probe of the digital voltmeter
to a clean ground. When you floor it, you want to see .87V to .97V.
Less than .87V means you're not safely rich. Back off, and add fuel.
You can add fuel by raising the fuel pressure, adding an extra
injector, or switching to slightly larger injectors. If you don't add
any fuel, don't run high boost!

Dan

--- In BC-BFLegacyWorks@y..., quin@t... wrote:
> Wellington.
>
> --- In BC-BFLegacyWorks@y..., daniel.wilson@d... wrote:
> > Where abouts in NZ are you?
> >
> > --- In BC-BFLegacyWorks@y..., quin@t... wrote:
> > > Dan,
> > >
> > > Thanks for the reply, I was hopping for something like this.
> > >
> > > The restrictor diagrame makes good sense, and shows this well.
OK
> > if
> > > I understand you right I want a strictor between the Manifold
and
> > the
> > > Bleed valve. I haven't got any of the bits I'll be needing so
> what
> > > sort of a restrictor should I be looking for? Also as a side
> > question
> > > do you know of anywere I can get the bits I'll need in NZ?
> > >
> > > My new enlitenment spurs on a few more questions. I am assuming
> > that
> > > in my cars current standard form I have a pipe running from the
> > > Manifold to the MAP sensor, which inturn has feeding pipes from
> the
> > > Turbo and wastegate. SO > I know I now need a restrictor to run
> in
> > > line before the bleed vavle.
> > >
> > > OK new revised plan, from line that runs from the minfold to
the
> > MAP
> > > I want to have at the manifold end a restrictor and then at the
> MAP
> > > end a bleed vavle? correct? I hope so. This I can manage and
feel
> > > confident to do.
> > >
> > > Next what about a regulator before the wastegate?, so that I
can
> > > control how much pressure the wastegate see's before opening.
So
> I
> > > could set the regualtor to open once say 10psi has built up in
> that
> > > line. So then I would avoid wastegate creep, so when boost
comes
> on
> > > it will come on hard.
> > >
> > > Now next the bleed2 diagrame, this looses me a little, I can't
> tell
> > > what I should be adding/re-plumping and what stays. So I am
> > guessing
> > > in this diagrame I would be totally bypassing the current MAP?
> and
> > > effectivly making my own? IF my above plan would work and do
the
> > job
> > > of increasing how fast boost comes on and how high it will
bosst,
> > > what will the sugestion in bleed2 do extra, I'm guessing be
> safer?
> > > but not sure, I've just got the RS and am looking to keep it so
> of
> > > course want the best option here as well, so all you ideas are
> > really
> > > very appreciated, so if you have chance to answer any of these
> > > questions I would be very appreciative.
> > >
> > > Thanks
> > > Quin
> > >
> > >
> > >
> > >
> > >
> > > --- In BC-BFLegacyWorks@y..., daniel.wilson@d... wrote:
> > > > Restrictor's
> > > > Why use one? Well, if you don't use one, when you try to drop
> > > > pressure in a line you'll have to bleed out SO MUCH air that
> > you'll
> > > > be hard pressed to make a large pressure drop in the line.
> > > > Where does the restrictor go? In between the source of
pressure
> > > (like
> > > > the intake manifold) and the bleed hole (or bleed valve).
> > > >
> > > > Restrictor Diagram http://groups.yahoo.com/group/BC-
> > > > BFLegacyWorks/files/restrictor.jpg
> > > >
> > > > In the above illustration air molecules represented by dots
are
> > > > leaving the intake manifold and heading for the actuator.
Just
> as
> > > you
> > > > can make the actuator "see" less pressure than you're really
> > > running,
> > > > you can also make the MAP sensor see less pressure than
you're
> > > > running. Same deal with the MAP line; orifice goes between
the
> > > > pressure source and the bleed hole/valve.
> > > >
> > > > You can use exactly the same style of setup for your MAP
Sensor
> > to
> > > > trick your computer into thinking you are running less boost.
> > > >
> > > > Note: you also want to include a pressure switch in the
circuit
> > to
> > > > prevent overboost.
> > > >
> > > > Over boost prevention diagram
http://groups.yahoo.com/group/BC-
> > > > BFLegacyWorks/files/bleed2.jpg
> > > >
> > > > Dan
> > > >


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BC-BFLegacyWorks-unsubscribe@egroups.com

Dan,

Cool thanks again.

OK I'll hopefully be able to mass together all these bits and have a
crack at it this weekend.

So would you recommend bleeding the line to the MAP sensor?

I have a boost guage and have been running round with it for a week
or so and have a feel for current boost and want to run it upto 1
bar, so should be OK for stock.

Thanks for all your help.

Quin

--- In BC-BFLegacyWorks@y..., daniel.wilson@d... wrote:
> Restrictor size should be about 10 to 12mm or .040" to .050", if
they
> are too small the check engine light may come on so just increase
the
> size.
>
> Yes the second digram only refers to, from the manifold to the
> wastegate actuator.
>
> Mitre 10 should have that sort of thing or mechanical/engineering
> workshop.
>
> Please note your factory computer will not allow you to run above
> 14.7 psi unless of course you bleed the line to the map sensor.
> You should be able to run 15 psi on the stock setup, more than that
> and you will have to add more fuel.
>
> Do not attempt any of this unless you have a boost gauge or
air/fuel
> mixture gauge.
>
> If you have no air/fuel gauge, run a wire from your O2 sensor wire
> (the one that reads .1V-.9V at warm idle, bouncing up and down)
> through the firewall, into the car. Hook the O2 wire to the red
probe
> of a digital voltmeter; hook the black probe of the digital
voltmeter
> to a clean ground. When you floor it, you want to see .87V
to .97V.
> Less than .87V means you're not safely rich. Back off, and add
fuel.
> You can add fuel by raising the fuel pressure, adding an extra
> injector, or switching to slightly larger injectors. If you don't
add
> any fuel, don't run high boost!
>
> Dan
>
>


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BC-BFLegacyWorks-unsubscribe@egroups.com

I wouldn't change the MAP sensor line unless you are going to run
more gas.

Dan

--- In BC-BFLegacyWorks@y..., quin@t... wrote:
> Dan,
>
> Cool thanks again.
>
> OK I'll hopefully be able to mass together all these bits and have
a
> crack at it this weekend.
>
> So would you recommend bleeding the line to the MAP sensor?
>
> I have a boost guage and have been running round with it for a week
> or so and have a feel for current boost and want to run it upto 1
> bar, so should be OK for stock.
>
> Thanks for all your help.
>
> Quin
>
> --- In BC-BFLegacyWorks@y..., daniel.wilson@d... wrote:
> > Restrictor size should be about 10 to 12mm or .040" to .050", if
> they
> > are too small the check engine light may come on so just increase
> the
> > size.
> >
> > Yes the second digram only refers to, from the manifold to the
> > wastegate actuator.
> >
> > Mitre 10 should have that sort of thing or mechanical/engineering
> > workshop.
> >
> > Please note your factory computer will not allow you to run above
> > 14.7 psi unless of course you bleed the line to the map sensor.
> > You should be able to run 15 psi on the stock setup, more than
that
> > and you will have to add more fuel.
> >
> > Do not attempt any of this unless you have a boost gauge or
> air/fuel
> > mixture gauge.
> >
> > If you have no air/fuel gauge, run a wire from your O2 sensor
wire
> > (the one that reads .1V-.9V at warm idle, bouncing up and down)
> > through the firewall, into the car. Hook the O2 wire to the red
> probe
> > of a digital voltmeter; hook the black probe of the digital
> voltmeter
> > to a clean ground. When you floor it, you want to see .87V
> to .97V.
> > Less than .87V means you're not safely rich. Back off, and add
> fuel.
> > You can add fuel by raising the fuel pressure, adding an extra
> > injector, or switching to slightly larger injectors. If you don't
> add
> > any fuel, don't run high boost!
> >
> > Dan
> >
> >


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