what's this gadget?...S5 gurus please
#1
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what's this gadget?...S5 gurus please
Okay, I'm working on removing all the emmisions related equipment off of my S5 and I'm looking at the UIM and there's a barrel shaped gadget inside it that rotates and connects the two shorter runners pretty much...didn't have a lot of time to investigate it so I don't know for certain. It's vacuum operated and I sure it has to do with a variable intake runner mechanism but I don't know:
what it's called.
how important it is.
whether I can live without it or not.
what happens if I remove it and block the hole off.
what happens if I wire it to the open position.
Any help will be appreciated.
what it's called.
how important it is.
whether I can live without it or not.
what happens if I remove it and block the hole off.
what happens if I wire it to the open position.
Any help will be appreciated.
#2
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I believe that's the VDI sleeve. Removing that will reduce your torque or high-end HP (I can't remember which.) I'm sure someone more knowledgable in S5 N/A's will chime in, but for right now, I'd leave that thing in its place.
#3
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That's the Variable Dynamic Intake (VDI) system, and it's not emissions related. It a big part of the reason S5's have 14hp more than S4's. Do a search and you will find plenty of info.
I wish people would stop assuming they can just rip everything off their engines...
I wish people would stop assuming they can just rip everything off their engines...
#4
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this is the VDI system...It helps out power in upper RPM range...Kicks in around 5200RPM...If you remove it then it will most likely hurt you performance...it won't work though because you are removing you emissions stuff...the system works off the air pump...There are peolpe on here trying to devise a way to make it work without the emissions crap on the car...search for 5th and 6th port fixes or something along those lines!!
#5
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Believe me if I were just ripping things off my car I wouldn't have asked...
so if it kicks in at over 5K then if it were wired open then I would still have the top end it attains only I would lose low-end power? I would really like to ditch the air pump but if it's necessary for this particular device then I may reconsider. Thanks for the help guys...
so if it kicks in at over 5K then if it were wired open then I would still have the top end it attains only I would lose low-end power? I would really like to ditch the air pump but if it's necessary for this particular device then I may reconsider. Thanks for the help guys...
#7
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what would be the results if the VDI were wired open indefinitely? I don't want to do it this way but I may not have a choice with the route I'm taking.
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#9
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You'll find out in a few days prolly...that or I'm going to wire it open...I'm trying to mix too much **** up to make one working car and some of this stuff just isn't fitting together.
#10
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Wiring it open would have a completely different effect than taking it out, and making a block-off plate. People have wired it to the "high" setting before, but I don't know of ANYONE who has used a block-off plate.
#14
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Originally posted by NZConvertible
I wish people would stop assuming they can just rip everything off their engines...
I wish people would stop assuming they can just rip everything off their engines...
I ****** rock!
-Chris
p.s. mine is turbo though, sorry
#15
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This guy swapped an s5 intake to an s4 engine.
He explains how it works & why..
http://homepage.mac.com/carldavis/intake/intro.html
He explains how it works & why..
http://homepage.mac.com/carldavis/intake/intro.html
#16
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Thank yo for that link Sureshot...that's very helpful beings it's an S4 block I'm having to utilize.
But...let me clearify my situation a lil. This car is not my driver. I have a much more dependable car for that. This car will be my semi-race project car. Another big reason for me doing this is that I do not have a decent air pump to use...my good one will go on the rebuilt car, not the toy. I am not worried at all about low-end drivabillity. I want top end only. I want everything at the top. So, beings this gadget only opens after around 4800rpm then I'm considering wiring it open. The port sleeves I am also considering removing or wiring open, beings there will be no air-pump nothing will be operating them either. So, does anyone have any results of wiring the VDI open? Or removing it and blocking it off all together?
But...let me clearify my situation a lil. This car is not my driver. I have a much more dependable car for that. This car will be my semi-race project car. Another big reason for me doing this is that I do not have a decent air pump to use...my good one will go on the rebuilt car, not the toy. I am not worried at all about low-end drivabillity. I want top end only. I want everything at the top. So, beings this gadget only opens after around 4800rpm then I'm considering wiring it open. The port sleeves I am also considering removing or wiring open, beings there will be no air-pump nothing will be operating them either. So, does anyone have any results of wiring the VDI open? Or removing it and blocking it off all together?
#17
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Just wire it open.
Just like everything else you mentioned, the bottom end will suffer, and there will be no change in top-end; as compared to a working, stock system.
Just like everything else you mentioned, the bottom end will suffer, and there will be no change in top-end; as compared to a working, stock system.
#19
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Originally posted by Makenzie71
so if it kicks in at over 5K then if it were wired open then I would still have the top end it attains only I would lose low-end power?
so if it kicks in at over 5K then if it were wired open then I would still have the top end it attains only I would lose low-end power?
I would really like to ditch the air pump but if it's necessary for this particular device then I may reconsider.
Why do you need to loose the air pump so badly? Why don't you just leave it and have properly working VDI and 6PI systems. The air pump draws hardly any power and weighs little compared to the weight of the car. It'll require a lot of stuffing around to rig other ways to make these systems work properly without the air pump, and at the end of the day you won't be any faster.
#20
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Originally posted by Makenzie71
.75lbs is a lot for and autoXer with an NA.
I didn't think anyone would take the seriously...
Last edited by Makenzie71; 04-23-03 at 06:14 PM.
#21
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Thread Starter
Originally posted by NZConvertible
I thought you weren't just ripping stuff off...
Why do you need to loose the air pump so badly? Why don't you just leave it and have properly working VDI and 6PI systems. The air pump draws hardly any power and weighs little compared to the weight of the car. It'll require a lot of stuffing around to rig other ways to make these systems work properly without the air pump, and at the end of the day you won't be any faster.
I thought you weren't just ripping stuff off...
Why do you need to loose the air pump so badly? Why don't you just leave it and have properly working VDI and 6PI systems. The air pump draws hardly any power and weighs little compared to the weight of the car. It'll require a lot of stuffing around to rig other ways to make these systems work properly without the air pump, and at the end of the day you won't be any faster.
lol...not trying to just rip stuff off...I'm short of parts and I want my toy working. I've got a pump and all the stuff to do it propperly but I can only have one car put together propperly with the parts that I have...and as it stands the propper parts will be going into my extremely clean '91 as soon as I got my rebuild.
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