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IFR table help please.

Old Apr 11, 2008 | 06:09 PM
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Default IFR table help please.

need values for the following injectors. Its on a stock pump 04 silverado. I downloaded the injector spreadsheet but i dont have excel on the new computer. Thanks for the help, it is vacuum referenced.


Delphi Multec II Shorty Direct-fit LS1 G.M. SUV injector 44 lb / hr.

Part Number 17113739 (OE Part # 25176061)
Direct fit for short G.M. LS1 SUV injectors
Static flow @ 37.95lb/hr @ 43.5PSI / 300KPa (4.31 g/s = 398cc/min)
Static flow @ 43.82lb/hr @ 58PSI / 400KPa (4.97 g/s = 460cc/min) *
Dynamic flow (2.0ms/10.0 ms(pulse width / rep rate)) 6.0 lb/hr @ 43.5PSI (0.748 g/s @ 300KPa)
Coil Resistance: High Impedance / High-Z (No ECM driver modifications required
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Old Apr 11, 2008 | 06:11 PM
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hum.... i cant remember what a 04 has... but i think the whole table should be 43.8
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Old Apr 11, 2008 | 06:44 PM
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well my current ifr table has a slope.....
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Old Apr 11, 2008 | 08:07 PM
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I believe 03 was the last year for the return style fuel system so 04 should be sloped.
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Old Apr 11, 2008 | 08:13 PM
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Here try this, I used this with my 43lb injectors with no issues...

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Old Apr 11, 2008 | 08:19 PM
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Code:
MAP (kPa)                0	5	10	15	20	25	30	35	40	45	50	55	60	65	70	75	80
Injector Flow (lb/hr)	43.82	44.09	44.37	44.64	44.9	45.17	45.44	45.7	45.96	46.22	46.48	46.74	46.99	47.25	47.5	47.75	48.01
Here are the numbers from the spreadsheet.

On a side note check out OpenOffice.org for a nice set of FREE tools that are compatible with microsoft word and excel. That is what I use on my laptop and in someways I like it better than the microsoft stuff.
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Old Apr 11, 2008 | 08:30 PM
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If your regulator is vac referenced, and you have a return fuel system then you SHOULD have a flat value in the ifr table. If it is currently sloped, then your tune has not been correctly setup for your fuel system.

Last edited by kbracing96; Apr 11, 2008 at 09:29 PM.
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Old Apr 11, 2008 | 09:25 PM
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I just seen it was a 04 and missed the part about it being vaccum ref.

Do you have a return fuel line?
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Old Apr 11, 2008 | 10:31 PM
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Whoops i lied. Maybe it doesnt have a reference It has a slope and has ran fine for 2 year..... Its not a return system. So a what is a point of vaccuum reference. I thought that yielded an increase in F.P.
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Old Apr 11, 2008 | 10:38 PM
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And thanks all for the values, just need to switch my table out of metric
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