acv/bac removal diagram
#1
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acv/bac removal diagram
Emissions removal clearification. 1990 n/a
For the acv removal all the highlighted systems and lines are to be removed?
Then block off plates installed. and vaccums capped.
Are their any other things to be done. i.e sensor connectors need to be tricked to giving good signals to comp. or adjustment on another system
ACV REMOVAL
1 ACV
2 solenoid valve (6pi)
3 solenoid valve (Switch)
4 solenoid valve (relief)
5 solenoid valve (VDI)
6 air pipe to exhaust
7 air pump
8 VDI actuator
9 appropiate vaccum lines
10 instal block off plate
BAC REMOVAL
1 BAC
2 hose to intake
3 replace coolant hoses
4 install block off plate
cap all vac nipples
AM I FORGETTING ANYTHING????????
For the acv removal all the highlighted systems and lines are to be removed?
Then block off plates installed. and vaccums capped.
Are their any other things to be done. i.e sensor connectors need to be tricked to giving good signals to comp. or adjustment on another system
ACV REMOVAL
1 ACV
2 solenoid valve (6pi)
3 solenoid valve (Switch)
4 solenoid valve (relief)
5 solenoid valve (VDI)
6 air pipe to exhaust
7 air pump
8 VDI actuator
9 appropiate vaccum lines
10 instal block off plate
BAC REMOVAL
1 BAC
2 hose to intake
3 replace coolant hoses
4 install block off plate
cap all vac nipples
AM I FORGETTING ANYTHING????????
#2
I'm a boost creep...
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You realise you'll lose ~30hp when you remove the ACV? This will disable the 6PI and VDI systems.
The BAC valve is not for emissions control, it's for idle control. There's no advantage to removing it.
The BAC valve is not for emissions control, it's for idle control. There's no advantage to removing it.
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nz
can use the exhaust pressure to activate both these systems with no damge from heat.
i have headers and presilencer, so ill just drill and tap into the exhaust
can use the exhaust pressure to activate both these systems with no damge from heat.
i have headers and presilencer, so ill just drill and tap into the exhaust
#6
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Back pressure from the exhaust won't help the VDI imho. The airpump does not eat up any hp worth talking about. Absence of the VDI and aux port action effects driveability whereas having the airpump installed does......not.
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Keep the solenoids in place, and simply replace the source of air pressure. No difference. The VDI and 6PI don't give a damn where the pressure is coming from once the solenoids click open.
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I realize I resurrected an old thread, but I think it was a worthwhile contribution.
This is something I've been researching for a while, and I expected somebody to respond with this solution. Strange enough, nobody ever suggests using back pressure on an S5 system. No difference really, if you think about it.
Recently I've been working on a 'pressure reservoir' for my S5, to keep a healthy reserve on tap from m S4 RB pre-silencer (back pressure port). A 1 or 2 liter reservoir could hold enough air at 5psi to last through 10 or more instances of solenoid clickings! But keep in mind that it would be continually topped off by exhaust back pressure through a couple high-quality check valves. Sounds like a bomb waiting to happen, but it might be a better idea.
Anyone know if the S4 system uses a reservoir? Or is it just straight back pressure?
This is something I've been researching for a while, and I expected somebody to respond with this solution. Strange enough, nobody ever suggests using back pressure on an S5 system. No difference really, if you think about it.
Recently I've been working on a 'pressure reservoir' for my S5, to keep a healthy reserve on tap from m S4 RB pre-silencer (back pressure port). A 1 or 2 liter reservoir could hold enough air at 5psi to last through 10 or more instances of solenoid clickings! But keep in mind that it would be continually topped off by exhaust back pressure through a couple high-quality check valves. Sounds like a bomb waiting to happen, but it might be a better idea.
Anyone know if the S4 system uses a reservoir? Or is it just straight back pressure?
#13
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BTW
Have a link to the Landers site with this electric pump you mention?
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