Is there a restrictor pill in the wastegate line? If so, if it is removed, will this lower peak boost levels?
My thought is that if the pill is removed, pressure to the wastegate actuator is increased thus opening the wastegate quicker and lowering boost.

 

Theres a restrictor pill in that line similar to the one in the boost sensor line I believe.

 

Dude, it is so simple to go do if you can get to it. Why not just go outside and do it and see what happens. I ran mine without one. I just do not know the results.

The boost the wastegate accuator sees will be the same with or without a pill. However, the pill will restrict the speed at which it sees the boost.


James

 

Not quite right. Bleeder-type boost controllers (ones that bleed air from a tee in the wastegate actuator hose) must have a restriction between the turbo and the tee. Without it the amount of air bled from the hose makes little difference to the pressure seen at the wastegate actuator, because the turbo can replace as fast than it can bleed. The restriction means only a small amount of air needs to be bled to make a significant difference to the pressure the actuator sees. Removing it will lower boost, not raise it. If you've taken it out, put it back in.

 

but if you were having problems with boost creep nz, it'd make sense to get rid of it... right??
and don't most t2's with the stock wastegate and mild mods basically have 'not enough' wastegate?

 

i don't have any of these pills anywhere.. what are the syptoms of not having them....?? do you really have to have them??? where exactlly do they go???

 

No, boost creep has absolutely nothing to do with wastegate control, only wastegate port size. Even if the wastegate's held fully open, it'll still creep if the port's too small (which it is).
Removing the pill will slow the rate that boost rises initially (which will make the car slower), but it won't fix creep. Leave it in.

 

We're talking about the Series 5 electronic boost control. That's why you don't have one.

 

You da man. I forgot how it goes too the boost controller also.

James

 

sorta unrelated but not really

i replaced a bunch of vaccume lines with siicone ones and now that car isnt running quite right and none of the replaced lines are leaking could i have accidently replaced on of these lines with a pill in it? and that cause my car to be running not right

hte car wont idle most of the time and will not build boost till above 4K rpm

 

The pressure sensor and wastegate actuator line both have one. Not sure what else.

 

Is the pill only in the wastegate line of the S5 cars? Do the S4 cars not have them?

 

If the pill in the pressure sensor line is missing, you'll hit fuel cut early. It won't cause these symptoms. As I said above, S4's don't have a pill in the wastegate line.

 

CBLAKE3,

If you remove the pill, pressure will start to act on the wastegate sooner but overall boost will be the same. Unless you have a bleed or some other boost controller.

 

I have an s4, but I put in a mbc, would I need to put a pill in or does it still not require one? Sorry for my ignorance on this subject.

 

Not correct. The S5's system is simply a bleed system with a solenoid on the bleed line to regulate pressure. If you don't believe my posts above, read the explanation of bleeder-type boost controllers on this page.

2a+RoN, that link will asnwer your question too.

 

I put the pill in.... wow, what a huge friggin difference! b4, I had the mbc turned almost all the way open just to get about 8psi!. I put the pill in and turned it almost all the way down just to be safe and it was already hitting 10psi. It spools up a lot quicker too. Thanks for the help.

 

Which line is this pill located in? I never noticed it in mine, and I've been doing alot of work with vacuum lines lately.

 

In the wastegate acutator line between the turbo and the tee. It's not really a vac line, it's much bigger.

 

Ok, I didn't screw with that line there, so I'm sure I still got it.

One thing though, I capped off the line that came out of the T and went to the stock boost controller. Does the pill serve and purpose anymore?

 

Check out my picture. I believe the pill is in the line coming from the turbo to the wastegate actuator.

Disregard my set up because I have a manual boost controler.

James

 

Just wondering....

Should I have the pill in the line even though I am using a manual boost controller?

James

 

NZConvertible
quote:Originally posted by swoop
If you remove the pill, pressure will start to act on the wastegate sooner but overall boost will be the same. Not correct. The S5's system is simply a bleed system with a solenoid on the bleed line to regulate pressure. If you don't believe my posts above, read the explanation of bleeder-type boost controllers on this page.

2a+RoN, that link will asnwer your question too.

Yes, I am familiar with that link. If you look at the diagram you will see that the pill slows down the build up of pressure behind the pill.

So what I said is true.

 

One day throw the front of the car up on jack stands, get a rotary file. Throw that in your drill, take off the DP, disconnect WG actuator, and start grinding. You can go to 23mm and have the stock flapper completely close the hole. Thats a full cm bigger than stock.

 

Why did you do that? Have you installed another boost controller? You sig doesn't mention one. If not, you've disabled the factory boost control and won't be running as much boost as you should be, nor will it be boosting as quickly as it should be. Did you remove the boost control solenoid as well?