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Old 05-24-2000, 12:45 PM   #1
HRE | giulio
Former Vendor
Member#: 481
Join Date: Nov 1999
Location: NY USA
Question The vacuum hose+bead trick... thingy

I did a search, but i cant find the original thread.
Someone once said they used a bead in some hose to enrichen the fuel mixture. Anyone remember that?
If you can find it, or know the steps to do it, let us know.
HRE | giulio is offline  
Old 05-25-2000, 01:32 AM   #2

Member#: 922
Join Date: Feb 2000
Chapter/Region: MWSOC
Location: Schaumburg, IL
16 WRX (white)
04 FXT (red)


Haven't heard anything about it but I'm guessing that they were talking about the hose the comes off the intake plenum towards the throttle body. I think that one takes a reading as to exactly what kinda prssure there is in there, but I'm not sure. It obviously has something to do with the way the car runs since it won't run with it off.

Personally I don't know about putting a bead in there (which'd make the passage for air smaler since it forced the air through the hole in the center of the bead instead of just the hose)... I'd be worried about it being sucked in or out or something.
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Old 05-25-2000, 01:38 AM   #3
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Join Date: Jun 1999
Location: Naperville, IL
2005 Legacy GT
98 BMW 540i LS2/T56


Actually it was modifying the vacuum signal to the fuel pressure regulator so that it would see more vacuum and raise the fuel pressure in the rails. I personally wouldn't do this, but to each his own.
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Old 05-24-2000, 02:25 PM   #4
HRE | giulio
Former Vendor
Member#: 481
Join Date: Nov 1999
Location: NY USA

I rem the bead was tight, and the the hole in the bead (made for string) still let some air pass through.
This mod was created before the SAFC was mainstream.
HRE | giulio is offline  
Old 05-24-2000, 04:11 PM   #5
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Member#: 191
Join Date: Aug 1999
Chapter/Region: NESIC
Location: Brooklyn
2012 J train


haha I acutally know alittle about this Dave (service manager of metric subaru) does this for his/mine/other dealers, car everytime we go to an auto-x. I dont think it does damage, but he says only to do it when racing, not all the time. he puts a screw in the vaccume line, I can show u how to do it if u like It helps alot though..I think
Keith is offline  

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