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Location:
Kita-Ku, Sapporo, Japan
Registered:
January 2003
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Re: Leaning out problem....
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Sun, 17 July 2005 16:42
 
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as far as fuel pump goes, is it a 255 or a 255 high pressure?
http://www.supras.nl/index.php?option=com_content& amp; amp;task=view&id=49&Itemid=65
http://www.autoperformanceengineering.com/html/fps pecs.html
some links regarding flow rates.. they do drop a fair bit at higher pressures, however 60psi should be ok for 189L/hr and 197 for the HP version..
damper should not hinder flow, it just removes the "fuel hammer" as such... sicne the reg flows most at idle, it can't be a restriction, but maybe it is not increasing pressure enough at WOT (as Norbs is suggesting)
what are the injectors capable of??
from a quick calc, with 16-17psi boost and 400cc injectors (and 12:1AFR), you will have 100% duty at approx 5500rpm...
for 7000rpm, you need about 480cc/min injectors..(edit, MAXED.. 80% duty = 600cc/min... maybe injectors are becoming erratic in operation? Norbie, what injectors are you running?)
this is rough calcs tho, but but... ideas...
now, 400ccx6 = 2.4L/min = 144L/hr
480x6 = 2.88L/min = 172L/Hr
the walbro pump should support 17psi at 7000rpm wth maxed out 480cc injectors...just.. infact it should barely support 100% duty of 525cc injectors with no fuel return, and 660cc/min at 80% duty..
[Updated on: Sun, 17 July 2005 16:44]
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| | Subject | Poster | Date |
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Leaning out problem....
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Southo | Sun, 17 July 2005 02:16 |
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Re: Leaning out problem....
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Norbie | Sun, 17 July 2005 07:45 |
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Re: Leaning out problem....
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Southo | Sun, 17 July 2005 14:38 |
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Re: Leaning out problem....
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oldcorollas | Sun, 17 July 2005 16:42 |
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Re: Leaning out problem....
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Norbie | Mon, 18 July 2005 04:04 |
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Re: Leaning out problem....
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Chris Davey | Sun, 17 July 2005 23:25 |
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Re: Leaning out problem....
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Southo | Mon, 18 July 2005 01:45 |
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woo hoo - 245kW - Leaning out problem....fixed....:)
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Southo | Mon, 25 July 2005 09:58 |
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Re: Leaning out problem....
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sideshow | Mon, 25 July 2005 10:04 |
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Re: Leaning out problem....
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Southo | Mon, 25 July 2005 13:21 |
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Re: Leaning out problem....
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Norbie | Tue, 26 July 2005 00:23 |
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Re: Leaning out problem....
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Southo | Tue, 26 July 2005 01:47 |
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Re: Leaning out problem....
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Norbie | Tue, 26 July 2005 01:56 |
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Re: Leaning out problem....
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Southo | Tue, 26 July 2005 02:27 |
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Re: Leaning out problem....
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MS-75 | Tue, 26 July 2005 10:06 |
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Re: Leaning out problem....
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sideshow | Tue, 26 July 2005 11:34 |
