Ok, i know that the S4's are operated by back pressure. But since i dont have a S4, that doesnt help me.
How EXACTLY do the actuators work on a S5? Iv heard its operated by the air pump, which is directed by the ACV. So if you run a free flowing exaust on a S5, will the 5th and 6th ports still open? or is backpressure still an issue?

 

back pressure is not an issue on the s5 cars, so yes you can run a free flowing exhaust.

You have the basics of how the VDI and 5th/6th ports work correct.

 

My 5th and 6th ports don't work. How do I fix them so they do work ?


Mike
---------
'86 NA
no mods

 

You say your car Is stock? Your existing problem Is probably due to the Auxilliary Ports being carbon locked, due to a lack of using them. Shame on you for not using them.

Only remedy Is to take out the complete Manifold and the sleeves. Soak them overnight with Castrol Super Clean first than give them a good scrubbing. This will ensure that your ports are restriction free.

 

mine where stuck, but after dousing the area in penetrating oil and taping lightly on it with a wrench, it freed up.

 

i just pulled the plungers up and WD40's them. worked great.

 

Of course, the ports are designed to operate try, so whatever lube you use to free them up should be cleaned off with degreaser.

 

i also WD40'd them and they open great

 

i have a s4 and when i try to push/pull them they dont move...so wd40 would do the trick? so i dont have to pull the whole manifol out to do this right?

 

Only temporarily. The real problem exists with the sleeves and the carbon that encomposes them. Although a pain, It would be prefered to remove the Whole Intake and sleeves. Than you'll see what I am talking about. I believe s4's (who have your problem)goes deeper than the Acuators. The sleeves are usually the culprit IMO.

 

i actually just took my sleeves right out. they are hanging from my rearview.

 

Whats the condition of them? All Black/Brown cruddy and oily?

 

Of course by doing so you killed your low end....

 

Sleeves rarely carbon up; it's the actuator rod(s) that gets gummed up in that copper bushing.

 

the sleeves were pretty nasty but not too bad and yeah i realize i have no low end anymore but its worth it on the high end
:-)

 

There is very little gain high end by removing the sleeves. Actually, you may LOOSE high end power. Better solution is to install the Pineapple units.

 

Just took mine out and it was the actuators rods too. The sleeves were fine.

 

which way do i face the sleeve on reinstall mine have been removed now fro about 3 months while i got a new intake manifold, now i am gonna reinstall them, also on reinstal should i put them in dry??? or with grease on them or what??

 

Install them with the openingd AWAY from the center line of the engine. So that way when you depress the Actuator Rod, the openings WILL line up to the Imaginary center line.

IMO, Install them back In dry. No WD-40 nothing. In the long run, that will attract the carbon and prevent full range of motion of thr rods.

 

Ahhhhhhhhhhhh...okay what is the truth on the sleeves??? I know you will lose low end (very important since tq has a DRAMATIC effect on acceleration), but it's said that you will gain power on the high end. How drastic of a loss is it down low and how good of a gain up high? Now I'm hearing that you could lose power up high...what's the truth (no bullshit please)?

 

To many misconceptions with "6 ports"

https://www.rx7club.com/forum/showth...light=argument