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Top 2GNT Technical Turbo/Nitrous Tech topic #35497
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Subject: "redesigning fuel system, confused. (attn. corbin)" Previous topic | Next topic
Teamner947Dec-04-02 04:52 AM
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#35497, "redesigning fuel system, confused. (attn. corbin)"




          

i decided that i'm just gonna do the same thing that works out for everone else with my engine, the 8.6:1 howell kit. i know i'm getting the hahn 415 cc/min injectors for christmas (kind of overkill for stage 2, but i want a lot of headroom), so i poked around corbin's site to try to figure out what kind of fuel setup i need. i'm excited about finally getting rid of the craptech FPR, and replacing it with a nice S-FMU. so far i've been able to figure out this:


<fuel pressure>=((<446 calculated flow rate>/<415cc/min injectors>)^2*<43.5 rated psi>)+<boost>
running 9 psi of boost with 415 cc/min injectors:
need 63 psi at 12 psi of boost
need 60 psi at 9 psi of boost
need 56 psi at 6 psi of boost
need 54 psi at 3 psi of boost
need 50 psi at 0 psi of boost

and i'll just keep my HRC "raped pig" in-line fuel pump for the time being. what i'm having issues figuring out is what my full vacuum pressure is suppose to be, and what components to buy for the S-FMU like if i need a special spring and what size disc to get. any help would be great. anyways, i'm done now.


2016 WRX STi Limited (current)
2001 A4 1.8tqms (donated)
1991 GVR4 #1933 (sold)
old.dsmregistry.com/detail.php?carid=218 (dismantled)

  

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Teamner947Dec-04-02 10:45 AM
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3168 posts,
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#35498, "RE: redesigning fuel system, confused. (attn. corbin)"
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bump


2016 WRX STi Limited (current)
2001 A4 1.8tqms (donated)
1991 GVR4 #1933 (sold)
old.dsmregistry.com/detail.php?carid=218 (dismantled)

  

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