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Old 02-27-2009, 09:04 PM   #1
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Default Flow rate of LS7 injectors

Looking for this info. at 58PSI. Thanks.
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Old 02-27-2009, 09:16 PM   #2
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Looking for this info. at 58PSI. Thanks.
if they are part number 0280158049 they are 34lbs.
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Old 02-27-2009, 09:34 PM   #3
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I was under the impression that the LS7 injectors flowed 42 PPH @ 43.5 PSI. That would put them at 55.9 PPH @ 58 PSI.
(new fuel pressure / old fuel pressure) x old flow rate of injector = new flow rate at new fuel pressure.
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Old 02-27-2009, 10:05 PM   #4
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I was under the impression that the LS7 injectors flowed 42 PPH @ 43.5 PSI. That would put them at 55.9 PPH @ 58 PSI.
(new fuel pressure / old fuel pressure) x old flow rate of injector = new flow rate at new fuel pressure.
thats why i wanted you to check the part number. unless they came from your car. If you bought them there are tons from ls2 being sold as ls7's they look identical. secondly oe injectors are rated at the oe rail pressure. only aftermarket is rated at 3 bar. take a ls1 28.lb its rated at 28 at 58 at 43.5 it flows a bit under 24 . check the part number this is the gm # for the ls7 12576341 it is 42 at 58. and the ls2 is 34 at 58
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Old 02-28-2009, 12:30 AM   #5
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thats why i wanted you to check the part number. unless they came from your car. If you bought them there are tons from ls2 being sold as ls7's they look identical. secondly oe injectors are rated at the oe rail pressure. only aftermarket is rated at 3 bar. take a ls1 28.lb its rated at 28 at 58 at 43.5 it flows a bit under 24 . check the part number this is the gm # for the ls7 12576341 it is 42 at 58. and the ls2 is 34 at 58
i wouldnt say identical, the ls7 are about a 1/4" shorter
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Old 02-28-2009, 01:50 PM   #6
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I was under the impression that the LS7 injectors flowed 42 PPH @ 43.5 PSI. That would put them at 55.9 PPH @ 58 PSI.
(new fuel pressure / old fuel pressure) x old flow rate of injector = new flow rate at new fuel pressure.
That equation is not correct for the change in flow rate based on the change in fuel pressure. You need the ( square root of (new pressure / old pressure) ) * old flow rate = new flow rate.
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Old 02-28-2009, 02:30 PM   #7
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That equation is not correct for the change in flow rate based on the change in fuel pressure. You need the ( square root of (new pressure / old pressure) ) * old flow rate = new flow rate.
You're right. My mistake. I looked at the equation again, and you are correct.
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Old 02-28-2009, 09:43 PM   #8
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Thanks for the help, I checked the part # and they are LS7 injectors.
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Old 03-07-2009, 10:08 AM   #9
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Are you looking to use these with the LS1 PCM?
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Old 03-12-2009, 08:28 PM   #10
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That equation is not correct for the change in flow rate based on the change in fuel pressure. You need the ( square root of (new pressure / old pressure) ) * old flow rate = new flow rate.
regardless they're 42lb's at 58PSI. I can copy over the LS7 injector settings into your LS1 PCM tune file if you need. I'm running them right now and went through the number crunching to get the tune right. Just PM me your EFILive file.
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Old 03-12-2009, 08:32 PM   #11
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regardless they're 42lb's at 58PSI. I can copy over the LS7 injector settings into your LS1 PCM tune file if you need. I'm running them right now and went through the number crunching to get the tune right. Just PM me your EFILive file.
Stock LS7 runs 58 psi?
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Old 03-12-2009, 08:32 PM
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