Adam,

You are going to get as many answers as you get responses. At some point, you'll have to make up your own mind and get something.

Yeah I know. At this point I think I'm going to go with the AEM Truboost. I think it will fit in my center dual guage pod, looks to be a 52mm and will replace my VDO boost/vac gauge that I am not completely confident in anyways. Sort of kill two birds with one stone. I'd like to not buy anything but if I drive the car when it's 40 outside I might have a problem and I certainly don't want that. Cheaper to be proactive.

Cheaper to drill the pill ;)

You're a cheap bastard. :rofl:

like I was saying, buy 3 factory pills and drill each of them to different sizes. Then try each one. it would still be faster, easier, and cheaper than installing a boost controller and tuning it plus it would cost you basically nothing. worst case scenario you buy the AEM

as for the EVC-S not working well on stock turbos, I'm skeptical of that. It works just like every other EBC out there with a solenoid. They clearly copied their competitors' design. It's the exact same Denso solenoid that Greddy and Apex'i use.

Alright I'm going to buy three pills and give that a shot. Does the larger pill size actually lower the boost, or just allow the car to lower the boost more effectively if necessary? I just don't want to be running around on 8psi when it's hot outside.

Arghx and AdamC, I am only working with the wastegate pill correct? So I'll call Ray and get three of them and then go to a machine tools supply house and get the 3 consecutively larger drill bits starting at the 1st bit up from .062"

Hypothetically if the first larger hole size works, would it hurt to go with the next larger size.

It allows more air to flow to the wastegate. The ECU has some limited feedback capability to make up for that.

https://www.rx7club.com/attachment.p...1&d=1287410919

That's not a direct answer to your question but I have never seen the internal boost control mapping in the factory computer. I have dealt with it on Subarus which also use restricter pills. Sometimes you have to go with a bigger or smaller pill on those cars, but it's a little easier because you can reprogram the factory boost controller built into the ECU.

Don't drill it too big.

You don't need to buy 3 pills. Remove the wastegate pill, and drill it ever so slightly larger. That's all you need to do. This will lower your boost. If it is not enough (which it most likely will be) take it out and drill it again. Do not do anything to the precontrol pill.

When you drill the pill, remember that it is made of a soft material. Take care not to crush it if you put it in a vice to hold it for drilling.

I called Ray to order three pills and he said they come in a set of two, already pressed into the hoses, they were around $40 per package for the two hoses. Maybe I said something wrong but I told him what I was doing and he said "you know thats going to lower your boost" so I think we were talking about the same pill that effects the wastegate.

I will try drilling out the one I have before I order any new ones.

Anybody know if there is a part number for just the restrictor pill and not the hoses too?

Mazda will not sell you the pills alone. Most parts guys don't even know they are in the hoses.

Some Subaru owners use welding tips as a cheap and more easily available replacement for restricter pills.

I saw the chart on the welding tips. I'm going to drill the old one and see what happens.

Holley carb jets can be used in lieu of stock pills and are easily available. Sizes in the 60 -->70+ range should be about right. They are numbered by flow but roughly track orifice size as seen in the following chart. Keep in mind that flow varies as the square of the change in orifice size, so a small increase in diameter can result in a large change. As an example: increasing the orifice size from .060 to .070 results in approximately a 36% increase in area.

Hope this helps.

That is very helpful. If I can't find the right drill bit to get me to .07 or so I'll pick up the right size jet. It will be much cheaper than buying new pills from Mazda.

Didnt get a chance to re-respond. But HKS EVC-S works amazing with non-seq twins (what i am running) and single turbo. More so.. it has functions to control boost response/turbo spool (night and day difference) as well as over boost settings that will drop boost pressure to wastegate spring pressure (7psi). Hands down the best controller I've ever seen, used, etc. I ironically left an indepth review on the West forum the day before I originally posted here. Not to mention the controller is essentially plug n play, no crazy wiring. Well organized, easy install as well as has the thin sleek control unit separate from the main unit allowing for easy and discrete mounting.

Blitz Dual SBC Spec R works flawlessly for my single turbo. I'm confident it would do the same for the twins.

Has anybody tried the EVC-S on a stock sequential setup?

Does the EVC-s display vacuum readings as well?

Anybody?

Why wouldn't it? If it reads boost, it reads vacuum, lol.

thewird

I asked if it displays vacuum. word.

Has anybody tried the Turbosmart e-boost street? Looks very simple, uses a solenoid.

http://www.boostcontroller.com/index...category%3D264

Setup videos
http://www.turbosmartonline.com/index.php?id=

Just get whichever you'd like in your interior. Your over thinking one of the simplest devices you could put in our cars. So unless your buying some chinese knockoff, don't stress over it so much. They all do the same job.

thewird

There is just a lot of information out there. I have read/seen plenty of posts regarding boost controller setup that sounded troublesome, or just problems with boost levels after installing one. I thought maybe somebody might have used this one specifically. I know some are more recommended than others for a stock sequential setup.

knight sports ebc 111 :)

Been sort of looking for one of those. Only heard good things about them. Not really wanting to buy a used piece of electronic equipment with or without japanese instructions though with no tech support or warranty. Maybe I'll come across a nice one though. Probably leaning toward the turbosmart eboost street. It seems like a new version of Greddys original profec for about $75 less than a profec type s and it has a digital display that can function as a boost gauge along with some safety features.