Fuel Rail Pressure on 275 vs. 310 - Ford Powerstroke Diesel Forum
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Old 09-14-2009, 05:47 PM
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Fuel Rail Pressure on 275 vs. 310

what are you guys seeing. I'm seeing 25,000psi on the 275 once the converter is locked at wot and on the 310 I'm seeing 24,000-24,500psi once the converter is locked. I do see up to 26,000psi with the 310 from a dead stop. I'm guessing the 310 is pulling the pressure down a bit because it's higer hp tune demanding more of the pump? What are you guys seeing? Thanks, Cole.
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Old 09-14-2009, 06:20 PM
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I quit paying attention to fuel rail pressure once I got the production file. I will monitor it next time I go out and do some WOT runs and I'll post back up
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Old 09-14-2009, 06:27 PM
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K, cool, thanks.
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Old 09-14-2009, 07:06 PM
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The FRP is higher with this tune, but I honestly had to quit looking at the DD and pay attention to what was flying towards me from ahead.

After driving with the 310 for 10-12k miles I really have not had any real issues with his or the EGTS, and I have towed 8-12k a few times as well. If you monitor the temps and manage everything with your peddle, you shouldn't have any problems. At first however, if you keep you foot in it (and you will), you will drain the rail quickly.

Enjoy the new HP, and smoke!
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Old 09-14-2009, 07:11 PM
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With the early beta files (v2 and v5) I would see rail pressure hit 29,000-30,000. But Matt tamed that a good bit for me.
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Old 09-14-2009, 07:23 PM
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I see 26,000+ psi at times, but what i'm wondering is once the converter is locked and you're hauling the mail at like 70-100mph do you see the frp pull down to like 24,000-24,500psi on the 310 and 25,000psi on the 275. I assume because the 310 demands more fuel it pulls the rail pressure down more.
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Old 09-14-2009, 07:26 PM
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I would guess so. I would go test this right now and confirm it, but the only 2 tunes I can run right now are the 210/TCM tune and the 310/TCM tune, no 275 yet
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