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Top 2GNT Technical Turbo/Nitrous Tech topic #26101
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Subject: "Is 12:1 ratio of FMU is too rich for our engine?" Previous topic | Next topic
JUNJUN712Jul-09-02 10:46 AM
Old School 2GNTer
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#26101, "Is 12:1 ratio of FMU is too rich for our engine?"


          

How much of fuel do we need each 1 lb psi of boost does our engine need anyways? They say 8:1 ratio is the right ratio, is that right?

  
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TeamXtremeRSJul-09-02 11:40 AM
Member since May 20th 2003
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#26102, "RE: Is 12:1 ratio of FMU is too rich for our engine?"
In response to Reply # 0

          

Well it all depends on your current set up...What turbo system do you have? Stock fuel injectors? I know on my HRC S16G setup, its a 5:1 ratio. This means for every pound of boost, you need to raise the fuel pressure by 5 psi. This is only for the HRC setup though..and for up to 6 or 7 psi.


13.5 @108 MPH-2.2 60ft(stupid FWD!)
S16G @ 18 PSI/FMIC/Running on MegaSquirt II (Now with sequential
fuel injection)
My webpage: http://eclipsed4evr.home.comcast.net
-1998 Mitsubishi Eclipse RS-T- "Toy"
-1992 Plymouth Laser Turbo AWD(SOLD)
-2000 Honda CR-V(daily)

  
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magicmanJul-22-02 05:40 PM
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#26103, "RE: Is 12:1 ratio of FMU is too rich for our engine?"
In response to Reply # 1



          

bump

  
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TeamMuRiXJul-22-02 09:36 PM
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#26104, "RE: Is 12:1 ratio of FMU is too rich for our engine?"
In response to Reply # 2

          

Who are they?

Question is absolutely dependant on what turbo and setup, etc. Easy answer - you want enough fuel so that you are running around 12.0:1 a/f at full boost.

05 Mazda RX-8
06 Lotus Elise

  
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