i got got the pipe and it looks really good quality... but i just had one question before the install... looking at the pipe there is a small tube right at the start of the pipe thats about that size of a small straw go starts and goes down about 6 inches and into the pipe... i dont think that is it part of the split air pipe because it is to small.... anybody know what this thing is so i can get on with the install.... thankyou... the sonner u reply the sooner i can install and let you know how much it kicks ***......

 

It could only be the split air pipe. I really dobut it would be anything else. Install it, and make a .wav file of it for us! I am installing my header and presilencer tomorrow (fingers crossed). Be prepared for a much louder car now!!

 

the thing that i doubt though is that the split air pipe is about 1cm thick... or maybe 1/3 of an inch and this thing is 4mm...??? soo i dunno

 

oh and plus i wan going to remove the air pump so i wouldnt need the split air pump... so what should i do?

 

Get some exhaust sealant, comes in a tube, and a bolt. The bolt should be as close to the size of the tube as possible, but still able to slide in. Coat the bolt in enhaust sealant, and slide it in. Cover the seam between the bolt and the tube w/ sealant, and let it sit for AT LEAST 24 hours, in order to cure. Or, better yet, find a buddy w/ a welder, and weld it closed.

 

it is for the port actuator

 

so what do i do with it?

 

Right, the split air pipe on S4 cars is the port actuator. Like I said, it HAS to be for the split air pipe. What year car you got bcty? If it is a 88 or before, keep it working. If after 89, just plug it and remove the split air pipe. A guy i know has this unit on his 90 automatic, and it is the split air pipe.

 

...i wanted to take the airpump out.... so if i dont connect this thing i will have to wire open my 6ports... shitty that was one reason why i got this... is there anything else u can think of that i could do to remove my aip pump?.. oh i have an 87.. i thought with a pipe like this we could remove our air pump?

 

You can still remove the air pump. the air pump on a series IV merely keeps the cats claen, and helps you pass emissions. Pull it. However, I have heard that it can cause your ports to open at 6k RPM, instead of the 3850 RPM where thay are supposed to. Time for you to make a decesion....

 

hmm i think i might try it... so do i still connect the little tiny pipe on the bonez unit to the big split air pipe? or should i seal it then?

 

Sealing it will make your ports not open. If you are planning on wiring open the ports, then go fo it!! If you want torque, connect the tube.

 

ok so im going to remove the air pump and still connect the tubes.. hopefully this will work.... and i would love to make a .wav.... what it the easyest way to do this?...
since all this talking is kinda confusing me plz write out what i could like.... connect pipe = ports work = keeping airpump dont connect pipe = ports may not work =ditch the air pump..... the main thing is the sizes of these pipes... the split air pump is a lot bigger then this little pinner pipe

 

Some of the advantages of this system:

High Flow for optimal power
Not as loud as a full header system
Easier to install than many header systems
Sporty exhaust note without excessive noise under normal driving conditions
Improved Gas Mileage from less backpressure

*Actuators still operate normally for optimal powerband (if using stock & some performance mufflers)*

Aluminized mild steel pipe resists rusting
Uses existing mounting points for a complete bolt up system
12 Month/Unlimited Mile Warranty against defects and rust (abuse not covered).

Does this mean with the airpump? (directly from there site)




NOTE: This system is illegal for street use. = GOOD


sorry for all these posts... but i was wondering what evreyone else did with the Racing Beat headers and prescilencer... since they can take their airpump out so... what did they do with there split air tube etc....

 

Yu can remove the air pump on 88 and down but you need to buy a dual groove pulley for you alternator, to keep the water pump turning properly. Back pressure operates the ports that is why the hose attaches to the pipe. My 88gtu picked up tons of power and the ports work just fine. I have heard that some people have problems with straight through muffers. I kept the stock mufflers and I am very happy with the new sound. I am in my 30's and this is my daily driver so I do not want a weedeater exhaust. I dont believe I am giving up much with stock cans on the back.

 

ok so what u did was just leave the pipe open the way it came because u took out the air pump?.... why do i need a pully is the air pump connected or on the same belt as the waterpump?

 

No, connect the hose from your old cat that goes to the actuator to the new pipe. the air pump belt does the majority of the work on the water pump. With that belt gone the alt belt is the only one on the water pump. So by adding a dual pulley you have a belt that has better contact on the water pump

 

question, when the ports are open, the actuators are pushed "in" correct? So if you wanted to wire them open if they're stuck you'd push the plungers in with a hammer or something and jb weld them, correct? Mine push in and out fine but if I ever wanted to stick them open i'd have to stick them with the actuator IN on both, correct?

 

To do so remove the 3 screws for each actuator, and then push the sleve down (on 86-88), up for 89-91. and then jsut use a tie strap and thats it. Also once you have done this, ther eis no use for the acv so get the $10 cover plate.


I tried shutting them to see how much low end tourque was lost and ther eis a slight difference. but also a VERY BIG diff in mid to top end (past 4K). WOW now I know how people with stuck ports felt.

I removed mine because I thought IU wasnt h=gona have enough back pressure to open the early so I jsut took them out.

I then later found a site that shows you how to open them with the airpupm (which I removed as well) like the 89-91 cars do for jsut $15 in suplies. Ah well I'll live.

 

ok ok.... why would i want to connect the pipe if i take my airpump out??? the airpump supplys air though there... OR is it that just the pipe senses back pressure. so when i take my aipump off i would still keep them connected right? and where can i pick up one one these pullys?

 

so pushing the sleeve down on the 86-88 is for more top end?? or the reverse?

 

pushing the sleeve down is more top end on 86-88... i think i might do this and forget all this trouble!!

 

Racing Beat, Mazdatrixs, or Rotary Preformance has the Dual pully.

 

i wired open my 6ports and drove it around... it is a really easy mod to do.. takes a bit of bending of the arm to get the right one tired down... but easy enough... my question is... i wired them open becuase i get my new exhaust on tomorrow and i need it like that... my only prob is that my car doesnt want to idel... it does but it sputters and its down low... has anybody had any troubles and can help me out any? this would be helpful i need an awnser by tonight!! thanks... anyone?

 

nevermind i think i got it.. it was a small hose connected to the pressure sensor i must have hit out!!... anyways do i really need a block off plate when i remove my air pump?