Intake Manifold Linkage Arms - Unbreakable Replacements
12-03-2012, 04:40 PM
#41
AudiWorld Super User
But true, if it has any built in spring (depending how strong) it would not be a direct operational replacement. When checking (outside the car) the correct design should be able to collapse and stay there or expand and stay there.
Even a new one should hold this position if pushed in >>>
12-04-2012, 04:14 PM
#42
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I think I can feel the buildup of corrosion that makes the flaps harder to open and close when I mess around with my system.
It might be that with metal rods and cups the system will fight back harder and keep the buildup from freezing up the works.
I tried spraying in there with some Deep Creep, both from the throttle body side and on the bearing/seal where the shaft goes through the manifold. the latter application seemed to help more but neither seemed to help much. I also siliconed the vacuum actuators to try to keep the bellows supple.
The metal rods and joints are probably a good upgrade and coupled with frequent workouts the system might stay working throughout the motor's life cycle. Environment will be a factor, sea air for example would probably make the corrosion worse.
At any rate I think a metal rod assembly is likely a better match to the sturdy-looking arms and springs.
It might be that with metal rods and cups the system will fight back harder and keep the buildup from freezing up the works.
I tried spraying in there with some Deep Creep, both from the throttle body side and on the bearing/seal where the shaft goes through the manifold. the latter application seemed to help more but neither seemed to help much. I also siliconed the vacuum actuators to try to keep the bellows supple.
The metal rods and joints are probably a good upgrade and coupled with frequent workouts the system might stay working throughout the motor's life cycle. Environment will be a factor, sea air for example would probably make the corrosion worse.
At any rate I think a metal rod assembly is likely a better match to the sturdy-looking arms and springs.
At what rpm and speed do you feel that the intake manifold is working correctly.
Compared to a friends 01 S8 mine is very slow on reacting on the gaspedal.
Since the actuators are working I cut of the vacuum lines to them and went for a drive. I sensed no difference in power or accelerating.
12-05-2012, 04:00 AM
#43
AudiWorld Super User
Hi,
At what rpm and speed do you feel that the intake manifold is working correctly.
Compared to a friends 01 S8 mine is very slow on reacting on the gaspedal.
Since the actuators are working I cut of the vacuum lines to them and went for a drive. I sensed no difference in power or accelerating.
At what rpm and speed do you feel that the intake manifold is working correctly.
Compared to a friends 01 S8 mine is very slow on reacting on the gaspedal.
Since the actuators are working I cut of the vacuum lines to them and went for a drive. I sensed no difference in power or accelerating.
In actual driving operation, the S8 manifold only switches over once (2 stage instead of 3 like A8) with both pods simultaneously at over well 5000 rpms. The A8 opens 1 pod 1st at 3360, then the 2nd at 5200.
Sorry, but if they are working and you feel no difference without them, then you just don't know your car very well or no feeling for torque at all. Look at the chart in the link below. If the pods are not collapsed (pulled back) at idle, then you are losing a whole lot of low rpm torque in your most used driving range (3300 and below). If you can't feel that, then leave it alone and enjoy your.
http://forums.quattroworld.com/a8/msgs/44689.phtml
Cheers
12-06-2012, 07:01 AM
#45
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Watch the pods while someone else starts (then shuts off) the car. If they're working right, they will withdraw within a second or so...and refill quickly when engine shuts off. If it works slowly or incompletely then either the pivots are seizing and need cleaning or you have a vacuum leak somewhere at the front of the engine...even a small leak in any small vacuum line will hinder quick operation.
In actual driving operation, the S8 manifold only switches over once (2 stage instead of 3 like A8) with both pods simultaneously at over well 5000 rpms. The A8 opens 1 pod 1st at 3360, then the 2nd at 5200.
Sorry, but if they are working and you feel no difference without them, then you just don't know your car very well or no feeling for torque at all. Look at the chart in the link below. If the pods are not collapsed (pulled back) at idle, then you are losing a whole lot of low rpm torque in your most used driving range (3300 and below). If you can't feel that, then leave it alone and enjoy your.
http://forums.quattroworld.com/a8/msgs/44689.phtml
Cheers
In actual driving operation, the S8 manifold only switches over once (2 stage instead of 3 like A8) with both pods simultaneously at over well 5000 rpms. The A8 opens 1 pod 1st at 3360, then the 2nd at 5200.
Sorry, but if they are working and you feel no difference without them, then you just don't know your car very well or no feeling for torque at all. Look at the chart in the link below. If the pods are not collapsed (pulled back) at idle, then you are losing a whole lot of low rpm torque in your most used driving range (3300 and below). If you can't feel that, then leave it alone and enjoy your.
http://forums.quattroworld.com/a8/msgs/44689.phtml
Cheers
My problem is just that the engine is reacting slow on pushing the gaspedal in terms of quick revving up. Although I just tried the max speed of the S8 in Germany and I can tell the limiter is taken of.
Besides we have three S8s to compare so you can leave the last comment behind it does not help to a solution where we are looking for.
Yhe car is just last week checked at ZF GErmany for the gearbox, new sparkplugs, bobines, put another LMM in it and other things but still not the sollution
12-06-2012, 03:23 PM
#46
AudiWorld Super User
"I read somewhere that the" world is going to end on December 21st. I'll let know how that goes...or not
09-22-2013, 07:01 PM
#49
AudiWorld Super User
If the system is mechanically not working correctly (stuck or sluggish pivots), there are no codes...just a difference in engine torque progression up through the rpm range.
If you have a problem due to a vacuum leak in the system, you'll more likely get an SAI code, since it runs off the same vacuum circuit.
If there is an electrical problem with one of the solenoid valves that control vacuum to each of the pods, that should trigger a code...something like P1512.
If you have a problem due to a vacuum leak in the system, you'll more likely get an SAI code, since it runs off the same vacuum circuit.
If there is an electrical problem with one of the solenoid valves that control vacuum to each of the pods, that should trigger a code...something like P1512.
09-22-2013, 07:06 PM
#50
AudiWorld Super User
P.S. The easiest way to check system operation is:
Engine off, both pods inflated and pivots pulled all the way to stops under spring pressure.
Engine idling, both pods fully evacuated and both pivots pulled all the way to open stops.
Engine off, both pods inflated and pivots pulled all the way to stops under spring pressure.
Engine idling, both pods fully evacuated and both pivots pulled all the way to open stops.