Miatapower List Archive

This read-only message was archived from a public mail list.
Mail From: "Ackley, Ray (R.A.)" <(email redacted)>

It would be interesting if we knew for a turbo application if an RPM switch point or a transition based upon boost would produce a better power curve...

Ray

-----Original Message-----
From: Kurt Summers [mailto:(email redacted)]
Sent: Monday, March 01, 2004 11:33 PM
To: Bill Wilner
Cc: (email redacted)
Subject: Re: 1995 Link ECU control of VICS solenoid on 1999 intake manifold?

Are you boosted? If so you can rig this really easily with a pressure switch. I had mine set this way before ordering a Mallory adjustable RPM switch.

You will need a 5-pin relay and a pressure switch for the cheapo setup. An old 1994-7 dummy oil pressure switch works fine, or you can find in the archives a note about an inexpensive adjustable switch (~$10?). Any time positive pressure is present, the switch grounds, triggering the relay.
You must have it set to break the circuit when the switch grounds to make the butterflies open. Thus the need for a 5-pin relay vs. a 4-pin relay.

Kurt


At 05:54 PM 2/27/2004 -0700, you wrote:
>I'm considering swapping a 1999 head and intake manifold on my 1995
>block as shown in Keith's "Performance Projects" book on p.45-46. (I
>have a 1995 Link ECU.)
>
>At the top of the right column on p. 46, he makes a passing reference
>to controlling the solenoid that operates the VICS butterflies with an
>RPM-triggered relay, but he doesn't specifically explain what relay to
>use, how to wire it into the ECU, or how to use the ECU to set the RPM
>that the solenoid is actuated to open/close.
>
>Has anyone got this setup and used the Link ECU to control that solenoid?
>
>Thanks,
>
>Bill
>

This read-only message was archived from a public mail list.
Mail From: "Ray" <(email redacted)>

We already do.


----- Original Message -----
From: "Ackley, Ray (R.A.)" <(email redacted)>
To: "'Kurt Summers'" <(email redacted)>; "'Bill Wilner'"
<(email redacted)>
Cc: <(email redacted)>
Sent: Tuesday, March 02, 2004 7:09 AM
Subject: RE: 1995 Link ECU control of VICS solenoid on 1999 intake manifol
d?


> It would be interesting if we knew for a turbo application if an RPM
switch point or a transition based upon boost would produce a better power
curve...
>
> Ray
>
> -----Original Message-----
> From: Kurt Summers [mailto:(email redacted)]
> Sent: Monday, March 01, 2004 11:33 PM
> To: Bill Wilner
> Cc: (email redacted)
> Subject: Re: 1995 Link ECU control of VICS solenoid on 1999 intake
manifold?
>
> Are you boosted? If so you can rig this really easily with a pressure
switch. I had mine set this way before ordering a Mallory adjustable RPM
switch.
>
> You will need a 5-pin relay and a pressure switch for the cheapo setup.
An old 1994-7 dummy oil pressure switch works fine, or you can find in the
archives a note about an inexpensive adjustable switch (~$10?). Any time
positive pressure is present, the switch grounds, triggering the relay.
> You must have it set to break the circuit when the switch grounds to make
the butterflies open. Thus the need for a 5-pin relay vs. a 4-pin relay.
>
> Kurt
>
>
> At 05:54 PM 2/27/2004 -0700, you wrote:
> >I'm considering swapping a 1999 head and intake manifold on my 1995
> >block as shown in Keith's "Performance Projects" book on p.45-46. (I
> >have a 1995 Link ECU.)
> >
> >At the top of the right column on p. 46, he makes a passing reference
> >to controlling the solenoid that operates the VICS butterflies with an
> >RPM-triggered relay, but he doesn't specifically explain what relay to
> >use, how to wire it into the ECU, or how to use the ECU to set the RPM
> >that the solenoid is actuated to open/close.
> >
> >Has anyone got this setup and used the Link ECU to control that solenoid?
> >
> >Thanks,
> >
> >Bill
> >

This read-only message was archived from a public mail list.
Mail From: "Ackley, Ray (R.A.)" <(email redacted)>

I remember a discussion regarding this a while back, but I don't think we saw any back to back dyno or DLL plot runs. Please correct me if I'm wrong, as I'm planning on a 99/00 headswap this summer. :-)

Ray Ackley

-----Original Message-----
From: Ray [mailto:(email redacted)]
Sent: Tuesday, March 02, 2004 8:31 PM
To: Ackley, Ray (R.A.); 'Kurt Summers'; 'Bill Wilner'
Cc: (email redacted)
Subject: Re: 1995 Link ECU control of VICS solenoid on 1999 intake manifol d?

We already do.


----- Original Message -----
From: "Ackley, Ray (R.A.)" <(email redacted)>
To: "'Kurt Summers'" <(email redacted)>; "'Bill Wilner'"
<(email redacted)>
Cc: <(email redacted)>
Sent: Tuesday, March 02, 2004 7:09 AM
Subject: RE: 1995 Link ECU control of VICS solenoid on 1999 intake manifol d?


> It would be interesting if we knew for a turbo application if an RPM
switch point or a transition based upon boost would produce a better power
curve...
>
> Ray
>
> -----Original Message-----
> From: Kurt Summers [mailto:(email redacted)]
> Sent: Monday, March 01, 2004 11:33 PM
> To: Bill Wilner
> Cc: (email redacted)
> Subject: Re: 1995 Link ECU control of VICS solenoid on 1999 intake
manifold?
>
> Are you boosted? If so you can rig this really easily with a pressure
switch. I had mine set this way before ordering a Mallory adjustable RPM
switch.
>
> You will need a 5-pin relay and a pressure switch for the cheapo setup.
An old 1994-7 dummy oil pressure switch works fine, or you can find in the
archives a note about an inexpensive adjustable switch (~$10?). Any time
positive pressure is present, the switch grounds, triggering the relay.
> You must have it set to break the circuit when the switch grounds to make
the butterflies open. Thus the need for a 5-pin relay vs. a 4-pin relay.
>
> Kurt
>
>
> At 05:54 PM 2/27/2004 -0700, you wrote:
> >I'm considering swapping a 1999 head and intake manifold on my 1995
> >block as shown in Keith's "Performance Projects" book on p.45-46. (I
> >have a 1995 Link ECU.)
> >
> >At the top of the right column on p. 46, he makes a passing reference
> >to controlling the solenoid that operates the VICS butterflies with an
> >RPM-triggered relay, but he doesn't specifically explain what relay to
> >use, how to wire it into the ECU, or how to use the ECU to set the RPM
> >that the solenoid is actuated to open/close.
> >
> >Has anyone got this setup and used the Link ECU to control that solenoid?
> >
> >Thanks,
> >
> >Bill
> >

This read-only message was archived from a public mail list.
Mail From: Martin Eby <(email redacted)>

Any chance you'd be willing to elaborate on that just a bit?

Martin.

At 07:31 PM 3/2/2004, Ray wrote:
>We already do.
>
>
>----- Original Message -----
>From: "Ackley, Ray (R.A.)" <(email redacted)>
>To: "'Kurt Summers'" <(email redacted)>; "'Bill Wilner'"
><(email redacted)>
>Cc: <(email redacted)>
>Sent: Tuesday, March 02, 2004 7:09 AM
>Subject: RE: 1995 Link ECU control of VICS solenoid on 1999 intake manifol
>d?
>
>
> > It would be interesting if we knew for a turbo application if an RPM
>switch point or a transition based upon boost would produce a better power
>curve...
> >
> > Ray
> >
> > -----Original Message-----
> > From: Kurt Summers [mailto:(email redacted)]
> > Sent: Monday, March 01, 2004 11:33 PM
> > To: Bill Wilner
> > Cc: (email redacted)
> > Subject: Re: 1995 Link ECU control of VICS solenoid on 1999 intake
>manifold?
> >
> > Are you boosted? If so you can rig this really easily with a pressure
>switch. I had mine set this way before ordering a Mallory adjustable RPM
>switch.
> >
> > You will need a 5-pin relay and a pressure switch for the cheapo setup.
>An old 1994-7 dummy oil pressure switch works fine, or you can find in the
>archives a note about an inexpensive adjustable switch (~$10?). Any time
>positive pressure is present, the switch grounds, triggering the relay.
> > You must have it set to break the circuit when the switch grounds to make
>the butterflies open. Thus the need for a 5-pin relay vs. a 4-pin relay.
> >
> > Kurt
> >
> >
> > At 05:54 PM 2/27/2004 -0700, you wrote:
> > >I'm considering swapping a 1999 head and intake manifold on my 1995
> > >block as shown in Keith's "Performance Projects" book on p.45-46. (I
> > >have a 1995 Link ECU.)
> > >
> > >At the top of the right column on p. 46, he makes a passing reference
> > >to controlling the solenoid that operates the VICS butterflies with an
> > >RPM-triggered relay, but he doesn't specifically explain what relay to
> > >use, how to wire it into the ECU, or how to use the ECU to set the RPM
> > >that the solenoid is actuated to open/close.
> > >
> > >Has anyone got this setup and used the Link ECU to control that solenoid?
> > >
> > >Thanks,
> > >
> > >Bill
> > >

This read-only message was archived from a public mail list.
Mail From: "Ray" <(email redacted)>

The data's not mine but Shiv demonstrated the validity of my theory, i.e.
that moderate-to-high boost alleviates the need for long tuned runners at
low rpm ... that longer runners simply add more flow resistance to boosted
intake air at any useable rpm.


----- Original Message -----
From: "Martin Eby" <(email redacted)>
To: "Ray" <(email redacted)>
Cc: <(email redacted)>
Sent: Wednesday, March 03, 2004 7:32 AM
Subject: Re: 1995 Link ECU control of VICS solenoid on 1999 intake manifol
d?


> Any chance you'd be willing to elaborate on that just a bit?
>
> Martin.
>
> At 07:31 PM 3/2/2004, Ray wrote:
> >We already do.
> >
> >
> >----- Original Message -----
> >From: "Ackley, Ray (R.A.)" <(email redacted)>
> >To: "'Kurt Summers'" <(email redacted)>; "'Bill Wilner'"
> ><(email redacted)>
> >Cc: <(email redacted)>
> >Sent: Tuesday, March 02, 2004 7:09 AM
> >Subject: RE: 1995 Link ECU control of VICS solenoid on 1999 intake
manifol
> >d?
> >
> >
> > > It would be interesting if we knew for a turbo application if an RPM
> >switch point or a transition based upon boost would produce a better
power
> >curve...
> > >
> > > Ray
> > >
> > > -----Original Message-----
> > > From: Kurt Summers [mailto:(email redacted)]
> > > Sent: Monday, March 01, 2004 11:33 PM
> > > To: Bill Wilner
> > > Cc: (email redacted)
> > > Subject: Re: 1995 Link ECU control of VICS solenoid on 1999 intake
> >manifold?
> > >
> > > Are you boosted? If so you can rig this really easily with a pressure
> >switch. I had mine set this way before ordering a Mallory adjustable RPM
> >switch.
> > >
> > > You will need a 5-pin relay and a pressure switch for the cheapo
setup.
> >An old 1994-7 dummy oil pressure switch works fine, or you can find in
the
> >archives a note about an inexpensive adjustable switch (~$10?). Any time
> >positive pressure is present, the switch grounds, triggering the relay.
> > > You must have it set to break the circuit when the switch grounds to
make
> >the butterflies open. Thus the need for a 5-pin relay vs. a 4-pin relay.
> > >
> > > Kurt
> > >
> > >
> > > At 05:54 PM 2/27/2004 -0700, you wrote:
> > > >I'm considering swapping a 1999 head and intake manifold on my 1995
> > > >block as shown in Keith's "Performance Projects" book on p.45-46. (I
> > > >have a 1995 Link ECU.)
> > > >
> > > >At the top of the right column on p. 46, he makes a passing reference
> > > >to controlling the solenoid that operates the VICS butterflies with
an
> > > >RPM-triggered relay, but he doesn't specifically explain what relay
to
> > > >use, how to wire it into the ECU, or how to use the ECU to set the
RPM
> > > >that the solenoid is actuated to open/close.
> > > >
> > > >Has anyone got this setup and used the Link ECU to control that
solenoid?
> > > >
> > > >Thanks,
> > > >
> > > >Bill
> > > >
>

This read-only message was archived from a public mail list.
Mail From: "Skip Cannon" <(email redacted)>

> The data's not mine but Shiv demonstrated the validity of my theory, i.e.
> that moderate-to-high boost alleviates the need for long tuned runners at
> low rpm ... that longer runners simply add more flow resistance to boosted
> intake air at any useable rpm.

Am I missing something here? Opening the VICS butterflys does not change
the length of the runners, that length is fixed. What the VICS does is open
a path into a Helmholtz chamber modifying the resonance of the intake tract.

When the butterflys are closed, the chamber is connected to the plenum via a
small passage, providing a different resonance.

I see no way of shortening the intake runners other than with the new FM
intake manifold or using the individual throttle bodies.

I just received an RPM switch from Summit Racing. It has dip switches to
set the actuation RPM. Maybe we can do a few dyno pulls at the FM open
house this summer to see what effect changing the actuation point has on the
dyno graphs.

Skip Cannon

This read-only message was archived from a public mail list.
Mail From: "Ray" <(email redacted)>

Yes it will be interesting to see if the fixed-length version of
variable-resonance gains anything with boost available.


----- Original Message -----
From: "Skip Cannon" <(email redacted)>
To: "Ray" <(email redacted)>; "Martin Eby" <(email redacted)>
Cc: <(email redacted)>
Sent: Wednesday, March 03, 2004 7:47 PM
Subject: Re: 1995 Link ECU control of VICS solenoid on 1999 intake manifol
d?


> > The data's not mine but Shiv demonstrated the validity of my theory,
i.e.
> > that moderate-to-high boost alleviates the need for long tuned runners
at
> > low rpm ... that longer runners simply add more flow resistance to
boosted
> > intake air at any useable rpm.
>
> Am I missing something here? Opening the VICS butterflys does not change
> the length of the runners, that length is fixed. What the VICS does is
open
> a path into a Helmholtz chamber modifying the resonance of the intake
tract.
>
> When the butterflys are closed, the chamber is connected to the plenum via
a
> small passage, providing a different resonance.
>
> I see no way of shortening the intake runners other than with the new FM
> intake manifold or using the individual throttle bodies.
>
> I just received an RPM switch from Summit Racing. It has dip switches to
> set the actuation RPM. Maybe we can do a few dyno pulls at the FM open
> house this summer to see what effect changing the actuation point has on
the
> dyno graphs.
>
> Skip Cannon
>
>