i need a final verdict. i have no cats and want to clear up space and clutter in the engine bay even if it has no hp gains overall. is it true that i can remove the air pump and acv as long as i, one: plug the acv opening and two: put a dual pulley on the alternator so the water pump doesn't slip at higher rpms? will this have any negative affects on drivability or "racability"?

 

you dont need the dual belt but it does help.. you can buy a smaller belt and slip it over the main pully and the water pump.. that helps a lot..

you can remove your Air pump and acv just get a black off plate to put where you acv is... RB sells one andits on there site or if your hand with metal make one yourself..

Tyler

 

If your cats are gone, that Air pump is dead weight DEPENDING on your year/model. If your car is an S5 N/A, that Air Pump is still serving a function.

Jarrett

 

Well, you have 2 final verdicts now. You can remove that stuff since you are not using your cats. Period It has no purpose what so ever now.

 

Yes, you can remove it as long as you block off the ACV opening (you can buy a block off plate from http://www.k2rd.com, or build your own), and run a dual pulley on the alterator (you can find these on ebay all the time). Alternatively you can use what is called a "yoohoo" belt. Its a belt from a lawnmower that fits perfectly across the waterpump and main pulley without using the alt pulley, which allows you to run 2 belts on the water pump. You can find info on his site http://www.pineappleracing.com

 

ok i have 88 gtu but its an 87 se engine

 

yeah remove it like i said above

 

your going to have to do something with your 6-ports. Either wire them open of figure out a way to get them to open with another pressure source.

 

"wire" them open?

 

checkin seven, checking haynes, checkin haynes again...
what the heck does the air silencer hose do?

 

I forgot about that, seeing as how I have a turbo. The back pressure controls the 6 ports so if you don't have enough they won't open correctly. Some people wire them open and some people use the airpump and a valve to open them. If you search for "6 ports" or something similar you should find the info.

Wiring them open is basically taking some wire and wrapping it around the actuator so it is stuck open, but then you will lose some low end.

The air silencer is to quite down the noisy air pump. I think it sounds like a cow or something without it.

 

Take off the aculaters and then set them to the "open" position and then tie a wire around them to hold them open. Hence "wire" them open

 

You don't need to wire them unless there is insufficent back pressure to open them on the 86-88.

 

there is a lead off the cat that sends exhaust gas back to the 5th and 6th ports to open them. there are two hoses one big and one little. they both need to stay plugged in and make sure the ports are loose. they need 3 psi to open when they are working properly. working 5th and 6th ports are better than wired ones.

 

his cats are gutted !

 

YES GET RID OF IT!!
No emmissions NO AIRPUMP!
Youd be amazed how wonderfull it is working under the hood with that damn thing gone...

 

and your point is???

I have seen plenty of FCs with their cats gutted or even RB silencers used that still had enough back pressure to activate the 5th/6th ports

 

And i've seen some that didn't. So it appears that we are at an impasse.

So lets come to a compromise.


DMSTKILLER, Do the 6-port test after your done with your mods. You know, put grease on the rods, go out and drive, check for the grease being moved.... IF they still actuate, I am wrong. If they dont, I am right...I wont say that Icemark is wrong, hes a mod now, and that could get me put in the doghouse...

Jarrett

 

Nah never, I hope everyone that thinks I am wrong would post and back it up. Mods are just people too, asked to help out.

 

Oh, I know... I just coudnt resist the cheap shot... Keep up the good work!....

Jarrett

 

oops...Forum hiccup..

 

has anyone made a S5 non air pump 5/6 actuating system yet?

 

If he has clean ports then this will prove wether he needs to wire them or not. But just saying to check if they actuate or not without knowing if they are clean is dumn and can make him think they don't work at all and wire them and make him loose the precious torque. Clean them and then test them. Oh and take off that pump and ACV