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I don't understand why GTRS cars run 440cc injectors, that sounds dangerous

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Old 05-24-2007, 12:28 AM
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Default I don't understand why GTRS cars run 440cc injectors, that sounds dangerous
4 550cc injectors max out at 320whp 100% duty.

440s would max out at 290 crank hp and thats low 200s at the wheels. 28RS and 71R would easily max out the injectors and blow engines.

380cc is spot on for 250hp k04
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Old 05-24-2007, 05:19 AM
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No idea :-(
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Old 05-24-2007, 05:51 AM
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Fuel pressure dependant.
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Old 05-24-2007, 07:17 AM
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*ding* those flow rates are for 3 bar nominal pressure, and we have a variable FPR I believe
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Old 05-24-2007, 07:25 AM
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ygm roman
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Old 05-24-2007, 07:30 AM
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Default i thought the filter restricted to 5 bar rail pressure
5 bar rail pressure minus 1 bar boost = 4 bar

440cc@4bar = 508cc/min 100%
440cc@5bar = 569cc/min 100% duty cycle

i dont think the rail pressure is variable. I could be wrong. I know the v6 motors use some sort of variable fuel pump.
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Old 05-24-2007, 07:34 AM
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then I have no idea =P
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Old 05-24-2007, 08:39 AM
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I used 4 bar to calculate, plus under boost it takes more than a bar of fuel per bar of boost
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Old 05-24-2007, 09:14 AM
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returnless fuel system means no its not variable.
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Old 05-24-2007, 09:51 AM
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Default Plenty of people have made over 300fwhp on 1.8ts with those injectors
Are they being pushed sure.. but they are doing just fine with an RS or 71r
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