wapelhj

Hi Guys,
As i can't find the Archives I'll risk the wrath of the Thread Police and ask the question here.

Where are all the "pills" located on an FD?

Thanks in advance for your help.

Jim

BoOsTin FD

there are only 2. Both go from turbo acuators to the turbo nipples. If you look at the acuators that are attached to primary turbo, you will see 2 hoses about 6mm thick. One is wastegate acuator and other is Pre-control acuator. The pills are in there. Wastegate hose is about 4 inches long and pre-control one is about 6-8 inches.

Amel

Mahjik

iTrader: (1)

seanfd3s

good pic and color, shows it off nice for people who dont know .

wapelhj

Gentlemen:

Thanks for your quick replies.

I have a 94MB Touring Auto 91000 miles stock - Engine was replaced at Mazda dealership (previous owner- have receipts) about 25000 miles ago under warranty.

No Pills - pulled the 4" and 6" hoses and nada. What happens without the restriction?? I can always put a plug in there with a hole drilled in it if its a big deal. restriction diameter??

Thanks again
Jim

dgeesaman

iTrader: (7)

94s and 95s don't have pills - the hose nipples have the restrictors built in.

Of course, it gets more confusing - I have a 94 with replaced turbos, since the turbos are from a 93 I have pills

moehler

iTrader: (12)

so if you want to put a boost controller into a 94 or 95, how do you remove the pills?

-Matt

adam c

iTrader: (2)

Many of the 94s have the pills in the lines. My car is one of them.

adam c

iTrader: (2)

If you have a car with the nipples, there are no pills. If you want to install a manual boost controller, you can drill out the holes in the nipples. I would not recommend drilling the prespool nipples.

moehler

iTrader: (12)

mine is a 95... is it a safe bet that I have no pills in the lines? I just bought some manual boost controllers and I'd like to know what I'm getting into before I take everything out to install these .

moehler

iTrader: (12)

why would you not recommend drilling the pre-spool nipple?

novadan67

Yes, this is true - my 94 also had the pills in the lines.

novadan67

Some people have had difficulty getting the boost pattern right when using two controllers. It seems to be much easier when only using a manual controller on the WG control line and keeping the pill (or restricted nipple) in the pre-spool line, but if you want to adjust the pre-spool (transistion dip) you'll have to drill that nipple out too.

dgeesaman

iTrader: (7)

The reason I've heard to not drill the PreControl Actuator pill/nipple is because it's extremely sensitive to change and hard to get correct.

Dave

PandazRx-7

iTrader: (18)

I have a question, for those who have the pills in the nipples and don't want to deal with drilling them out, why not just cap off the nipples and tee into the hose at the Y-pipe? All you need is boost pressure going to the actuators that can be restricted with pills right?

Somebody correct me if I'm all confused?

Edit: If I'm not mistaken, wouldn't this method also show better boost response from both turbo's rather than just one?

wapelhj

You guys are awesome. If I have to make a pill what diameter hole? .025??

Jim

Mahjik

iTrader: (1)

Stock Wastegate Pill is about .062"
Stock Turbo Pre-Control is about .058"

novadan67

You might want to just make the pre-spool pill and put a manual boost controller in the WG control line. That way if you notice any boost spikes with future mods you can just turn down the boost. Here is a link for the how-to (it is cheap and easy):

http://robrobinette.com/boost_controller.htm

moehler

iTrader: (12)

After searching around it seems that some 94's and 95's have pills and some do not...

Does anybody know what 94's and 95's had the pills?? I just bought two nice manual boost controllers, and I hope that I can use them without drilling anythng out .

adam c

iTrader: (2)

I suggest that you drill the wastegate line (if it has a nipple), and install the Manual Boost Controller (MBC) only on that line. Drive the car, and see how you like it. A MBC is generally used to keep the car from over-boosting by allowing more air thru the wastegate line. You will have to drill the nipple to allow more air.

Mahjik,

The prespool line has a pill that tries to set the prespool to 8psi at transition. You have said that it is .058". Do you know what effect the larger pill would have if placed in the prespool line?

Thanks, Adam

moehler

iTrader: (12)

Thanks Adam. My problem isn't that I'm over boosting... I want to use the controllers to help me from under boosting . My car car is tuned to 14 psi, but once it gets hot, it only hits 12 -13 depending on how hot it is outside. I figure with the controllers I can open up the "restrictive" pills slightly and get more accurate higher boost. In theory, this should work, correct?

adam c

iTrader: (2)

The MBC can also be used to increase boost. Just keep closing it until it reaches the desired level. If you are under-boosting, you shouldn't need to drill the nipples (but I would do it anyway).

wapelhj

Hi guys,

Here's my parting question-- if there are no pills or restrictors(there aren't on either set of 94 turbos) then how is the boost limited??

Thanks again for taking the time to reply.

Jim

PandazRx-7

iTrader: (18)

No pill means that there will be more pressure going to the actuator and when that happens it opens the wastegate prematuraly and dumps the extra exhaust out. And when that happens your boost gets limited.

Mahjik

iTrader: (1)

I have no idea. I would imagine that opening it too early will vent too much flow before the CRV is closed; causing a loss of some primary boost, however with maybe a slight gain during the transistion period.