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what size are the injectors in a 6.2L

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Old 11-27-2012, 11:26 AM   #21
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Originally Posted by JCunningham View Post
Pink injectors at 408kPa (4.08bar ~ 59psi): 5.599121 g/sec ~ 44.438213 lb/hr
Stock injectors at 408kPa (4.08bar ~ 59psi): 6.355956 g/sec ~ 50.444941 lb/hr
Seems odd to my way of thinking that a supercharger vendor would furnish injectors supplying less fuel than the OE hardware.

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Old 11-27-2012, 11:55 PM   #22
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12.5 under boost isn't a bright idea.
im not sure but i mite have let up on the gas when i looked at the gauge
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Old 11-27-2012, 11:58 PM   #23
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Seems odd to my way of thinking that a supercharger vendor would furnish injectors supplying less fuel than the OE hardware.

me too. and the tune they send with it is absolute garbage. they expect you to run around with it to keep the warranty. its way to rich and the timing is all messed up in it.
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Old 12-28-2012, 01:38 PM   #24
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Would yall like to sell the 42lb injectors since there to small for your setup?
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Old 12-28-2012, 02:04 PM   #25
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already did
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Old 12-28-2012, 02:29 PM   #26
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12.5 under boost isn't a bright idea.
Exactly, maybe at 2-3 psi in throttle transitions but anymore and it needs to be in high 11's. once you start getting around 10psi I would shoot for 11.5 or so especially considering the ethanol content in fuel having a stoich even richer. I have found next to no power differance between 11.4-11.8 so IMO its not worth pushing it but rather leave yourself a little safety margin.
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Old 12-28-2012, 04:06 PM   #27
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Exactly, maybe at 2-3 psi in throttle transitions but anymore and it needs to be in high 11's. once you start getting around 10psi I would shoot for 11.5 or so especially considering the ethanol content in fuel having a stoich even richer. I have found next to no power differance between 11.4-11.8 so IMO its not worth pushing it but rather leave yourself a little safety margin.
i should have added something to that in the lines of "pump gas" on 110, or c16 i would run it that lean for power.
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Old 12-29-2012, 06:52 PM   #28
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Originally Posted by Boober View Post
The 6.2 flex fuel injectors are around 50 pounds per hour at 58psi. I dont know how to get a jpeg of the flow rate vs rail pressure Table in my stock tune but i can tell you 100% that 50#@58psi is what it shows. I'm not sure what the 5.3 flex fuel injectors are but I've heard they are lower. 58psi=4 bar, 43.5psi= 3 bar

Btw....your stock (50#) injectors are also too small for 8psi. When I just had my Whipple with 8psi on stock injectors, I was we'll over 90% (80% is generally considered safe) injector duty cycle at WOT. At 8psi, your actual rail pressure will be closer to 50psi. I have 60# injectors now and I'm still over 90% at WOT. The problem is with the returnless fuel system and the fuel pump control module and you don't even want to start looking in THAT mess, trust me. I gave up and am currently installing a meth injection system to make up for the high duty cycles at full throttle. Do yourself a favor and get some big (80#+) injectors, get your tune corrected for them and be done with it.
yes yes yes and HELL YES!!!!!
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Old 05-09-2013, 07:04 PM   #29
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Dyno tuned today the stock injectors were at 98%idc need ID850
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Old 04-22-2016, 07:32 PM   #30
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Dyno tuned today the stock injectors were at 98%idc need ID850
Did you ever change injectors and retune?
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