I just replaced all of my vac lines with silicone ones, I'll let you know how it goes w/o the restrictor..

 

It's not hard to get a "visual demonstration"- connect a meter to the boost sensor input at the ECU and go for a drive, with and without the restrictor. We'll patiently wait for your test results

 

ORIFICE

PART NUMBER: 139868

GOES INTO HOSE PART NUMBER: 935104

PAGE 2-J15 AT THIS PLACE http://www.mazdaformance.com/rx7parts.htm

 

I'll do that Wayne, I doubt it does much at all, hence why I'm trying it..

 

damn you're the man

 

You might not notice a difference without the pill, but believe me when I say it is absolutely necessary. I had my car on the dyno at K&D Rotary about 3 weeks ago. During my first couple of runs the A/F numbers were jumping all over the place. The A/F graph looked like a seismic readout from California during the “Big One”.

We were stumped until Dave saw that I had silicone hose going to the pressure sensor. He asked if I replaced the “pill”. I said no, the car never had one…so he found one and installed it. BINGO! My A/F numbers smoothed out. I could not believe that a .01 cent piece of plastic could make that much of a difference. With my A/F numbers smoothed out and steady, I picked up 2 peak RWHP.

 

Thanks Hailers! Yes it took me this long to finaly get my but in gear and order the damn part. FYI for everyone who stumbles on this thread:


The orifiace/pin needle thing is teh same for both s4 and s5 models.
Lable: "Orifice"
Group number is 139868
Mazda P/N: 8931-13-986
Price as of 28 Feb 05: $2.00

The hose is also same for both s4 and s5.
Lable: "hose"
Group number 935104
Mazda P/N 9935-10-4999.
Price as of 28 Feb 05: $12.00

\

 

Coincidentaly, the "pill is about 1cm by 1mm. Its insanely small. I didn't notice any big change after i installed it, but its supposed to be there, so its there.

 

I'll do better on the part numbers next time. Right page though.

 

No worries, still woulda been a pain if you hadn't had the page number Thanks

 

dang, i need to get one of those, usually sputters between shifts when i first hit the gas in the next gear. doesn't do it all the time, but when it does it's annoying as F***. or if i'm in gear and moving steady at a low rpm and suddenly hit the gas, it feels like you do a quick tap of the brakes before it takes off.

 

Thanks for the link.