i couldn't get an exact answer to this, so i hope someone can help. with the boost pill, it can increase your max boost. but i've also seen in threads people that run without the boost pill and they get the same or similar result. so is there a point in the boost pill if it's going to get tuned? since i already have it sitting on my desk, should i use it regardless when i get my tune done?

 

It's really up to your tuner. After the tune if he feels you need a pill he will put one in.

 

As per COBB's instruction, I have mine out for "Stage 2" upgrades. No issues with it to date.

 

Bumping the dead, but I;ve one question;; I'm going to run Cobb's ots stage 1 map for a while until i get the required parts. Will I have to remove the boost pill on the stage 1 mapping? I'm still unsure about this. If anyone can chime in, I'd appreciate it. Thanks!

 

from http://www.accessecu.com/accessport/.../EVOXMaps.html

the "map notes" links tell you what mods are required for each map

 

no you dont have to, u remove it for stage 2

 

you might want to do some logging and check your boost level

I ran stage 2 with the pill out and I was overboosting... ended up putting the pill back

 

get your car tuned by a tuner using AP, theyll tune it on what mods u have on the car...just my 1cent..

whats ur mod list?

 

Mod list is just a Works dropin and a Perrin catback. Workin on getting a downpipe soon.

 

Boost!!! its one hell of a drug

 

word.

 

Stage 1, pill in. Stage 2, pill out. Why are you unsure? It's very clear.

 

wtf is a boost pill?

 

Basically, it's a metal piece that looks like a pill that sits in one of your vacuum lines. Removing it increases boost.

 

On the Evo X the pill in question (there are 3) limits the amount of air that can be bled from the wastegate actuator through the two solenoids. Recall that bleeding air raises boost.



Here's how Cobb shows pill removal on a X:



The 3000GT VR-4 had a similar setup, and removal of the factory pill raises boost on both cars.



Pills are found on most factory boost control systems for internal wastegates, across different manufacturers.

On the Subarus, there is only one pill and it comes off the compressor housing (Evo X has an equivalent pill). This factory pill limits the amount of air supplied to the wastegate. When you remove this pill, your boost goes down. Recall that supplying air to a wastegate actuator lowers boost, but no lower than the spring pressure allows.