Reg return fuel pressure - Diesel Truck Forum - TheDieselGarage.com
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post #1 of 8 (permalink) Old 02-21-2008, 05:49 PM Thread Starter
 
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Reg return fuel pressure

Getting ready to install a regulated return. I am looking to find a good base line start point for the fuel pressure. I have a 2003 7.3L with 3.5" discharge pipe, 3.5" walker big truck muffler, and stock tail pipe for exhaust, AIS, DP-Tuner 60 tow 80 econ and 120, hpx crossover line, and 6.0L I/C and trans cooler. I would go right to Jody but they are closed this week. It would be good info for others too. I haven't found anything on this on any of the big diesel forums. Thank you for any help.
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post #2 of 8 (permalink) Old 02-21-2008, 05:50 PM
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i think its 45 psi stock but im sure some one will correct me

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post #3 of 8 (permalink) Old 02-21-2008, 06:00 PM
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Start with 60 and work up to around 72 - every truck seems to be different.

Stock can be anywhere from 45-55

prt

'99 F250 X-cab 2wd

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post #4 of 8 (permalink) Old 02-22-2008, 12:34 PM
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I run mine at 55 to 60 psi. I have ran it higher but didn't see any difference.

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96 F-350 CC Dually My TDG Gallery
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post #5 of 8 (permalink) Old 02-22-2008, 02:07 PM
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Every truck is different. I played around with mine at the drag strip one day to figure out what works best. My truck runs best at around 70 psi of fuel pressure, meaning at that pressure my idle is at its smoothest, and I also get the best ET's and MPH at the end of a run. Bumping the pressure up over 75 psi gave me a loss of power and also changed the idle. Also going below 63 psi does the same thing. My fuel pressure gauge shows that on a WOT run, my fuel pressure will drop about 3 psi. I'm still running the stock fuel pump, and a 3 psi drop is nothing.
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post #6 of 8 (permalink) Old 02-23-2008, 04:58 AM
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68psi here...

01 F-250 SC PSD,210k,16 Isspro Gauges, AFE-2,CCV Mod,IAH delete,map reg,Modded H2e, 6.0 IC, GTS Hybrid injectors, Studs, 910 Valve springs, Forged rods Water injection,Swamps tuned, MBRP 4" dual's, Aero, 6" tip's, 100 axl tank, 4" Revtek lift, 37-14.50-17 TOYO MT's 469hp and 1068tq...

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post #7 of 8 (permalink) Old 02-23-2008, 02:02 PM
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Dunno what mine is, whatever bone stock is, I guess...
Quote:
Originally Posted by CSIPSD
68psi here...
That seems kind of high to me, but I'm defiantly not the expert...

Also, how did the new motor like the addition of drugs to it's intake?

Jarrett
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post #8 of 8 (permalink) Old 02-25-2008, 05:32 PM
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68 is about middle of the road for most, some have it higher, some have it lower... Every motor likes a differant pressure.

OBS stock is in the 45-55psi range.

No new drugs other then Water...

01 F-250 SC PSD,210k,16 Isspro Gauges, AFE-2,CCV Mod,IAH delete,map reg,Modded H2e, 6.0 IC, GTS Hybrid injectors, Studs, 910 Valve springs, Forged rods Water injection,Swamps tuned, MBRP 4" dual's, Aero, 6" tip's, 100 axl tank, 4" Revtek lift, 37-14.50-17 TOYO MT's 469hp and 1068tq...

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