ok, so i want to ditch the AP but im not finding a kit to do so like the pineapple racing one just the pulleys... is the pulley thing ok or is the whole kit bettter for the belt contact? also any links or info is a big help in where to find this. i did search but all i found was an 3-4 month old group buy and pinaples site soesnt list it?

 

I just removed my air pump and still retain the stock pulleys. You could get a pulley kit that elimates the air pump as well, but it's not necessary (sp?). Those kits typically come with belts anyways. However, the size belp that I found useful was a 31 1/4" 6 ribbed belt. The sixth rib kind of shredded itself off. I think the perfect size is like 30", 5 ribbed belt. Too bad they don't make those, well, the 7 shops in my town don't carry that size.

 

With the stock ECU, it is a bad decision as the engine will idle badly. Why you ask,
because you can not disable the O2 FB system.

 

isnt it required if you remove the main cat as the air pump pumps air into the caT?

 

It's not necessary because it will just pump air into the midpipe area. I kept it on my car for awhile just because I was just to lazy to get another belt. It acted as a place holder. It looks a lot better without the airpump in my opinion. In fact, the airpump only works from like 0 - 3000 rpm or something close to that.

If you remove the whole system i.e. air pump piping and get block off plates then you can save around 20-30 lbs.

 

And clear room for a nice single turbo upgrade... maybe .

On the whole belt idea I heard Bosch had a 720mm 5 groove belt that worked well does anyone have the P/N on that. But the correct way to do things is to go out and buy bigger pulliesand give the waterpump more surface area to work with, you will end up underdriving them but quelle dommage eh.

 

Pineapple Racing has the air pump elmination kit. UR also had a kit but doesn't offer it anymore. Like Chuck said though, with a stock ECU, your going to have some idle issues.

Tim

 

Not completely true, I run a remapped stock ECU and even with the stock ECU I had no problems with my idle when the air pump was removed. All you have to do to find out if it will affect it is to unplug it and see. The idler that Pineapple offers helps you to retain much of the contact area on the water pump pulley when the air pump is removed, the aftermarket under drive kits help minimally over eliminating the air pump over the stock pullies. I went with a home made version of pineapple racings version.

 

thanks for the info i will unplug it and see. I need to get block off plates too? i am going nonsequential, HKS intakes, new FPD/injectors, and doing a few other things soon so i was going to eliminate that useless part as well.

so if i unplug it and it idles bad the i need to get a PFC even quicker than i thought to correct for this problem?

 

A PFC and some tuning never hurts but I don't know the mods ur looking to do. As long as you don't do anything crazy, the stock ECU should be fine.

 

Do I need to remove this in order to clear room for my single turbo or will the shop probably remove this while taking all the stock parts out anyways?

 

When you remove the air pump aren't you forced to run the pulley over the water pump going in the opposite direction (Clockwise as opposed to Counterclockwise)? Running the belt over the grooved side as opposed to the back side of the belt?

Wouldn't this be a less effecient means of operating the water pump? Or is there a way to reverse the pump so that it needs spun clockwise instead of counter clockwise (as it shows in the manual)?

 

The dealship disconnected my airpump when is was stock and I never had an idle issue. It was that way for about half a year.

 

Just get the Greddy pulley kit. It's not expensive and comes with the correct belt. You can get replacement belts from Rotary Performance. It seems to have good contact on the water pump pulley - at least it works just fine on my car. Bonus, it's pretty.

Removing the injected air from the intake/exhaust usually makes it idle poorly, though it will still idle, it just "hunts" a bit. The PFC solves this, of course, and if you are going single turbo you need the PFC -before- you install the single turbo. Unless you enjoy blowing engines!

 

I researched removing the AP. Like the responses in this thread suggest, there was a wide range of reported results, from no problems at all, to a terrible idle and hesitation on acceleration. There were also problems associated with the belt contact and possible premature plugging of the cat. Every car seems to be a little different.

 

OK MY MODS ARE GOING TO BE AS FOLLOWS:

ordered/recieved parts are=
-AST/caps
-HKS intakes
-non-seq mod/ported wastegate
-greddy boost controller
-greddy elbow and rs BOV

to come soon=
-PFC and commander
-midpipe
-AP elimintation
- v-mount setup
-batt relocation

so, i was just wondering if the "mod map" that people run on the pfc and those mods would be supported well enough and the AP kit wouldnt make the water pump less efficient, and if i modify the relay for the fuel pump and get a walbro i should be set till im ready for BNRs and a streetport right? tyhe PFC will take car of all those issues and the midpipe will take care of clogging cats. right?

 

Need a DP since I didn't see it stated in the post. That, plus the mid pipe will get rid of the cats. The pre-cat was the one that tended to slag and cause problem and that will be replaced by the DP.

Tim

 

THE DP AND Cat back are already installed.

 

which injector setup are you going with? if you have any questions about that when you do it feel free to PM me on here or TI, i just recently did my whole fuel system.

 

The water pump is designed to run in one direction and one direction only. If you move the belt from running on the smooth side to being driven by the grooved side it will run backwards and will "not" move water through the cooling system, I'd say it would be far more than than less effiecent.

 

I totally agree. Ask me how I know...

 

I have a greddy pulley kit for sale, Brand new, if you are interested. I was going to install it, but I figured out a way to run the airpump with my single setup so I dont need it. It is a great solution to getting good contact on the water pump pulley...comes with belt, wp pulley and alternator pulley.

PM me for details.

 

LOL pm'ed, sorry i didnt see the brand new part. interested!