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C5 z05 fuel injectors

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Old 02-20-2017, 12:49 AM
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mybadz06
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Default C5 z05 fuel injectors

I bought a beautiful torch red 2004 z06 and the previous owner had done some high quality work (headers, cam, head work, callaway injection. The car runs liek a scalded dog with 437 rwhp. I was recently looking at the injectors and they are the OEM Bosch 28 # injectors (12561462), MY QUESTION IS THIS - ARE THESE SUFFICIENT FOR THE ADDITIONAL Power (est 50 additional rwhp) ??
Old 02-20-2017, 07:46 AM
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marco383
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Originally Posted by mybadz06
I bought a beautiful torch red 2004 z06 and the previous owner had done some high quality work (headers, cam, head work, callaway injection. The car runs liek a scalded dog with 437 rwhp. I was recently looking at the injectors and they are the OEM Bosch 28 # injectors (12561462), MY QUESTION IS THIS - ARE THESE SUFFICIENT FOR THE ADDITIONAL Power (est 50 additional rwhp) ??
If the car runs strong and pulls to redline, you've answered your own question.
Old 02-20-2017, 11:43 AM
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onspeed
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Originally Posted by marco383
If the car runs strong and pulls to redline, you've answered your own question.
not necessarily - injector duty cycle is probably pretty high, close to 100% if I had to guess.
Old 02-21-2017, 12:38 AM
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mybadz06
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yes, the car runs strong but could larger injectors create additional HP?
Old 02-22-2017, 06:37 PM
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C5 Pete
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No... Generally speaking, the installation of larger injectors will not make any more horsepower.

The injectors you currently have are likely ok at your power level. Best way to find out is to datalog it with HPTuners or throw it on a dyno with a wideband.
Old 02-24-2017, 03:19 AM
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RonSSNova
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I have 32 lb/hr LS2 injectors and hit 98% duty cycle.
But no clue on hp.
Air fuel ratio that you are tuned for affects the duty cycle as does rpm.

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