How much is too much fuel pressure? - Diesel Truck Forum -
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post #1 of 6 (permalink) Old 03-21-2010, 05:22 PM Thread Starter
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How much is too much fuel pressure?

I have my Raptor set for 20 at idle and it stays around 15 when I punch it. Is that okay, or do I need to lower it some?

1999 Dodge 3500 Dually, Cummins, Edge Juice with Attitude, BHAF, open exhaust, Auto tranny, 21 MPG and it pulls a giant camper pretty well at 11 MPG. Just added the Raptor 150 Pump and big line kit.
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post #2 of 6 (permalink) Old 03-22-2010, 04:52 AM
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that should be fine.

01 quad cab 4x4, edge drag comp, 4" exhaust, fass 150, 250 ddps, Jefferson State compounds 683hp so vp 11.91. AMSOIL front to rear. now back to stock 95 fummins in the works
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post #3 of 6 (permalink) Old 03-22-2010, 12:21 PM
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Originally Posted by 01quadcab View Post
that should be fine.
I've been idleing at 25 for a long time, WOT around 20/21


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post #4 of 6 (permalink) Old 03-23-2010, 01:03 AM
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idle on mine is 24 and WOT is 14

2001 CC LB 2500 48RE with TQlockup CAI, 5"TBE,Quadzilla Adrenaline with V2,and BD pulse XXX 100hp stix, phatshaft 66mm .leveled on 305/70/16's
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post #5 of 6 (permalink) Old 03-23-2010, 12:03 PM
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post #6 of 6 (permalink) Old 03-23-2010, 04:26 PM
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I know of a couple of guys that installed a mechanical pump from a 12V and getting about 35-40 PSI on the high side. I think this is a bit extreme...

Never heard of a failure yet... But something to consider you flooding the return rail with pressurized fuel from the overflow valve. So being a little over 20 PSI isn't going to hurt nothing but consider the designed pressure and what in might do to the pump later in life.

I'm set for 17.5 at idle but at WOT never get below 15 PSI... Never

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