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Nnbs silverado returnless fuel system questions

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Old 04-18-2016, 08:45 AM
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Originally Posted by rednekferlife101
Let me know how that goes! I'm very curious how it works. Kinda weird how you still have good fuel at 38psi? What idc are your injectors at at 38 psi?
Unfortunately he said he doesn't do it for trucks. These 450s flow more at lower psi anyhow, my injectors are only 44% my commanded afr is 11.46 and its showing 10.6 on my Guage so i have plenty of room
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Old 04-18-2016, 06:37 PM
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Originally Posted by setxathlete14
Unfortunately he said he doesn't do it for trucks. These 450s flow more at lower psi anyhow, my injectors are only 44% my commanded afr is 11.46 and its showing 10.6 on my Guage so i have plenty of room
What kind of power are you making? And how can it flow the same fuel at 38spi as the stock pump on 58psi on the same lines?
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Old 04-18-2016, 07:14 PM
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Originally Posted by rednekferlife101
What kind of power are you making? And how can it flow the same fuel at 38spi as the stock pump on 58psi on the same lines?
Just made 632 on 8lbs. Look at the flow chart of walbro 450s. It flows higher at lower psi. Im about to turn it up and put e85 to it
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Old 04-18-2016, 07:23 PM
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So you'll never see over 38psi? Do you think you can make close to 800 at 38psi with that 450 pump?
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Old 04-18-2016, 08:10 PM
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Originally Posted by rednekferlife101
So you'll never see over 38psi? Do you think you can make close to 800 at 38psi with that 450 pump?
Byrdman did it. Turned it up just to see how far the pump could go. He said 800 is where it started going lean
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Old 04-18-2016, 09:37 PM
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Ya Just seems odd on 38psi but hey if it works I'll take it! I'm hoping to be getting it in one day this week. Just got the call today my motors done and will be shipping out tomorrow!
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