6.7L rail pressure sensor in a 5.9?

[skneeland]

I have been told that the rail pressure sensor from a 6.7L has the same thread pattern & electrical connection as the ones in the 5.9?
Anyone able to validate this? Also wondering if anyone has upgraded & respanned their 5.9 with this mod?

my truck goes through a sensor at least every 6 months (its gotta be the diprocol rail pressure gauge.....) at $450/sensor from the dealer im getting a little fed up of this. It looks like I have another one going now & I was thinking of trying this mod....

*yes, i have seen replacement sensors online for under $100, but of course they seem to go at the worst time when im in the middle of nowhere*

[AH64ID]

I understand that the connector is slightly different, but can be easily modified to work.. A 6.7 rail pressure gauge would be needed, but the ISSPRO one works on both connectors so no modification would be necessary.

IIRC you would run approx 13% higher rail pressure unless you re-map the sensor voltage.

[FUBAR]

Excuse my ignorance.. But is the 6.7 sensor more robust or ??

[2007 5.9]

Excuse my ignorance.. But is the 6.7 sensor more robust or ??

There is a thought that the 6.7 sensor is a 30K sensor from the factory...

~Les

[DoghouseDiesel]

Just be careful if you use it.

Just because the sensor can read higher, doesn't mean your fuel system can handle the higher pressures.....especially if you have the old style injectors in the early '06's.

Start pushing 28K psi and you're gonna do damage.

If you have the newer style stainless steel injectors and are using the larger 6.7 connector tubes, rail and lines, it's a little more forgiving, but just changing the sensor so you can see the higher pressures is like putting a depth finder on a boat and running in shallow water....by the time you see something, the damage is already done.

[AH64ID]

From some old notes I have the 5.9 sensor has a range of 0-26107 psi and the 6.7 has a range of 0-30000 psi, in the same 0-5v reading.

There are several people running a 6.7 sensor just for the 13% rail pressure increase across the board.

[2007 5.9]

Although I am not a fan of running pressures of over stock, it would be nice to see what my actual pressures are on a spike at the end of a WOT run....seeing 27.5K on the gauge...I know it's getting higher.

~Les


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I am here: http://maps.google.com/maps?ll=37.996567,-122.070181

[DoghouseDiesel]

Although I am not a fan of running pressures of over stock,

~Les

Nor am I.

Lot of risk for minimal gain.

Most of the damage I see come in is from a combination of 3 things.....
1 - Mod or Dual CP3's
2 - Relief valve removed or modified
3 - Pressure box; specifically MP8's.

Those 3 right there are the common denominators that I see with injector and piston damage.

Do I run a relief valve? No.
Do I run dual CP3's? Yes.
Do I run RP higher than 24K psi? No.

[AH64ID]

Has anyone noticed how much lower pressure the 6.7's run while cruising? They do go much higher under load, but are considerably lower at low load... maybe Dodge/Cummins realized the gain wasn't worth it and dropped the average pressure to get longer life?

[DoghouseDiesel]

That may also be due to the emissions requirements, which is more than likely the bigger issue.