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Old 01-19-2006, 09:39 PM   #1
subieracer18
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Default Utec and brass restrictor

I had a mbc installed and i lost the brass restrictor in the stock line. Is there a part at the parts store that i can use to replace this? what size is the restrictor?
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Old 01-19-2006, 09:41 PM   #2
Gethin
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stock pill is 1.03mm
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Old 01-19-2006, 09:58 PM   #3
subieracer18
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did you have to replace this too? Can i use plastic insted of brass? Does anybody have a picture of this piece? I haven't seen what it looks like in a long time.
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Old 01-19-2006, 10:23 PM   #4
Uncle Scotty
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Quote:
Originally Posted by Gethin
stock pill is 1.03mm

...that's 1.2mm, I think
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Old 01-20-2006, 12:38 PM   #5
GDR
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Quote:
Originally Posted by Uncle Scotty
...that's 1.2mm, I think
I think so too

For those that plan on making one.
Boost control is very sensitive to hole size. I made a few different sizes in .003"(human hair) incements awhile back. I noticed a difference in each size on my WRX with just AP stg1.

pill thread
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Old 01-20-2006, 12:46 PM   #6
Gethin
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I know it's 1.03mm
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Old 01-20-2006, 01:14 PM   #7
GDR
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Quote:
Originally Posted by Gethin
I know it's 1.03mm
OK now. You made the old machinist get off his ass and get the pill box.
The hole accepts a .046" (1.168mm) wire . So I took a very experienced guess at the 1.2mm (.0472") size.

.0405(1.03mm) caused alot of boost spike and knock but boost response was very quick. It was very fun but that pill came out as soon as I got home.

This is for a stock 03 WRX TD04. Do you have something different?
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Old 01-20-2006, 01:42 PM   #8
Gethin
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I got my information from hanging around a local rally shop and looking at their pill collection and talking with people that have had their cars tuned there. The pill in my car is 1.03mm and it's an early 02 WRX, i've not changed the pill at all. I know that you need to use the correct pill size depending on mods, for example a TBE and tune accordingly or you will get boost oscillations and/or spiking.

If you guys have different sized pills and your cars are stock, then it's a mystery to me and obviously there is more to it that I know about.
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Old 01-20-2006, 02:19 PM   #9
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Quote:
Originally Posted by subieracer18
I had a mbc installed and i lost the brass restrictor in the stock line. Is there a part at the parts store that i can use to replace this? what size is the restrictor?
Just order the ORIFICE here http://www.subaruparts.com/diag/?mod...category=073-1
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Old 01-20-2006, 09:58 PM   #10
kenlee
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Quote:
Originally Posted by GDR
Awesome find GDR. I needed one of these as well.
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Old 01-20-2006, 09:59 PM   #11
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Quote:
Originally Posted by Gethin
I know it's 1.03mm




that "id = 1.2' VERY likely means 1.2mm....NO?????
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Old 01-20-2006, 11:00 PM   #12
Gethin
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Dont worry I can read, no need to be a smartass.

Last edited by Gethin; 01-20-2006 at 11:09 PM.
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Old 01-21-2006, 12:06 AM   #13
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....love ya too, sweetheart
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