Whats a good place to start for fuel pressure? - Dodge SRT Forum
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post #1 of 11 (permalink) Old 04-01-2019, 04:48 AM Thread Starter
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Whats a good place to start for fuel pressure?

I finished up installing my new fuel system setup. Walbro 255, 3/8 feed and return lines, fuelab regulator. Where should I start for my fuel pressure? I'm regulating after the rail.
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post #2 of 11 (permalink) Old 04-01-2019, 07:26 AM
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stock is 58psi... thats a good place to start and leave it at if you have the raising rate hooked up.
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post #3 of 11 (permalink) Old 04-01-2019, 08:54 AM Thread Starter
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I am using the vacuum. Do I set it with the hose attached or not? Right now I have the hose attached, and it idles at 60psi
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post #4 of 11 (permalink) Old 04-01-2019, 09:41 AM
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Set with it unattached to a vacuum/boost source. Then attached to an unshared port between the TB and the head.
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post #5 of 11 (permalink) Old 04-01-2019, 11:33 AM
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i'm not sure about the fuelab regulators, but i know the aeromotive ones (like i have) do not like to see vacuum. They want a boost only source.


435 HP & 438 TQ -E85
Tuned by Turbo666 on his mustang dyno

Best ET to date: 12.1 @ 124 on DR's
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post #6 of 11 (permalink) Old 04-01-2019, 11:51 AM
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The stock tune is built around a static fuel pressure. If you don't have a custom tune set it at 58 and don't connect a boost/vacuum source.
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post #7 of 11 (permalink) Old 04-01-2019, 11:55 AM Thread Starter
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I bought a Diablosport Intune to tune it with. I plan on running the 93 tune.
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post #8 of 11 (permalink) Old 04-01-2019, 12:09 PM
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That is a modified stock tune, but still uses a static fuel pressure. As an end user you don't have the ability to account for changing fuel pressure.
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post #9 of 11 (permalink) Old 04-01-2019, 12:57 PM Thread Starter
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So it's my best interest to just run static pressure?
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post #10 of 11 (permalink) Old 04-01-2019, 02:23 PM
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Yes, set your fuel pressure to 58 psi and don't connect a boost/vacuum source. That's how the stock setup works.
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DiabloSport tuned by Brian (Mindmelt101) at Drag-On Resources.
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post #11 of 11 (permalink) Old 04-01-2019, 03:02 PM Thread Starter
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Ok I'll start there. Thank you for your help
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