komanji_klub

AHHHHH WANHHHHH!!!! I just want to get rid of that stupid air pump and all that silly stuff under my hood that is making it A. ugly and B. taking away from that Zen place of "balance" that is so awesomely amazing! ANYONE know how I go about removing this emissions junk as there is no air-care in my neck of the woods and I'm running an N/A motor for now and would like the most out of it until I get my new turbo motor together YAY TURBO TURBO!!! PLEASEEE give me anything you got on how to do it

THANKS!

NZConvertible

Since you have an S5 NA you shouldn't remove the air pump. It provides pressure to operate the 6PI and VDI systems, and without those you'll lose 30-40hp. Other than the cat, none of the emission controls affect performance, so if you want to get the most out of it you might as well leave them alone.

komanji_klub

Oh well, I guess I'll just have to suffer for now until I get my turbo motor up and goin.

Thanks for the info though, removing that air pump would have been a silly loss in power don't need that, already shy enough on POWA.

Hey anyone got any ideas for intake mods though :S? right now I've got an open filter box with the filter on top of it just kinda clipped in with some tabs I made to hold it from blowing off *SKETCH*

Thanks!

komanji_klub

btw, what do the "6pi" and "VDI" systems do exactly?

ithajokai

iTrader: (1)

Best intake is the factory intake with a replacement filter.

NZConvertible

The 6-Port Induction system is basically the rotary equivalent of Honda's V-TEC. An additional intake port in each chamber opens up in the top half of the rev range to increase the intake timing and duration.

The Variable Dynamic-effect Intake system is similar in principal to the variable length manifolds that are common today. A valve opens up at high revs to alter the acoustic tuning on the intake system.

Search the 2nd Gen section for those two terms and you'll find dozens of threads with more info. The FSM also has some good info. If you don't have the FSM (and you should), click here and download it in PDF format for free.

pfsantos

iTrader: (1)

Well, you can get block off plates for the EGR (if it's an S4), Metering Oil Pump, Cold Start (if equipped), Air Control Valve, Air Pump, Main Cat (put in a pipe there), etc. There are drawbacks, like having to pre-mix if blocking off the MOP, etc. If you have an S5, you need to use an electrical method for the 6PI and an auxiliary air compressor.

You can buy block-off plates online, or wait till I make some nice ones with exact contours in Stainless (shameless plug).

komanji_klub

k... so.... removed the air pump belt today just to see what was going on and... ya see, I gained horses and, I got better throttle response so... obviously the air pump wasn't affecting this "vdi" system nor the "6pi" system therefore I ono if you are possibly thinking of the emmissions on a turbo motor or maybe an s4 as mine is N/A s5 motor

AUGieDogie

iTrader: (4)

Its possible they wern't working anyway. My only N/A car never had either working. That being said..... I doubt you gained any horses. If you found this out on a dyno, then somthing is really really backwards. IF the systems are working right, wich i kinda doubt by the sound of things, you would lose power.

Do you run a Cat converter on the car? IF you do, having no airpump will kill it. Thats not a problem for emmisions, BUT if it gets plugged up then you will lose even more power.

Advice.

1. Hook the belt back up!
2. Do a search and/or check the service manual to test the 6port and vdi. IF they are not working fix them.

Now if they are working and you want more power, you can get rid of the cat all together, and maybe get some headers from racingbeat. If you still REALLY want to get rid of the air pump (i understand this one beleive me) you can rig up the ports and such to work off of a electric air pump, its been done and apperantly works.

komanji_klub

hmmm sweet, well I removed my cat and have headers and a 1 (3") into 2 (2.5") system going on right now as I was prepping for my turbo. but I will trouble shoot my vdi and 6pi because that does sound fishy.

Thanks guys always lookin out for me

davemo

no problems with nixing the pump and thermoreactor and replacing it with a standard header set up on an S4, right?

NZConvertible

No, your S5 engine has both 6PI and VDI systems, and both are operated by air pump pressure. If you'd read the FSM like I suggested you'd know that.

Two things are clearly wrong with your car. That fact that this didn't cause a power loss means that neither of these systems were working, so you were already well down on power compared to what the engine should be making. And the air pump puts minimal drag on the engine, so if you gained performance from disconnecting it, there must be something very wrong with it.

If that turbo engine isn't going in soon, I'd spend some time fixing the NA engine and restoring all that lost performance...