Got around to installing a Boost Gauge this weekend, see picture; tapped directly into the intake manifold for the pressure sensing line. Seeing 25 psig on steady acceleration up a moderate incline. What pressure are others seeing that have a Boost Gauge and possibly a higher performance tune?

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Supporting Vendor and Moderator of LOST
05 Jeep Liberty CRD Limited
Ironman Springs/Bilstein/Shocks
Yeti StgIV Hot Tune
Week's BatteryTray
No FCV/EGR
Samcos/ProVent
SunCoast/Transgo
Carter Intank-pmp
2mic.Sec.Fuel Filter
Flowmaster/NO CAT
V6Airbox/noVH
GM11 Bld.fan/HDClutch
IronrockArms/wwdieselMount
98 Dodge Cummins 24 Valve

I haven't seen 25 psi more than couple seconds, then it drops to about 22. That's pedal to the metal.

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2005 kj CRD, samco, suncoast tc, provent, Kennedy lift pump, GDE ECO full torque, 2nd gen filter head, 245/70/16 a/t tires, mopar light bar, fumoto oil valve, OEM Skid Plates, ARB Front bumper and HD OME, tru cool LPD47391 40k GVW tranny cooler (stock cooler delete), FF Dynamics e-fan and shroud, rocker arms replaced, HDS2 190F thermostat.

I usually see 23 max, then goes down to 20 with a full torque ECO tune.

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Phil
2005 131k 3.7 Gasser (Lifted-CRD Springs, 4.10 Gears, F+R DTT, Teraflex 2wd Low, Skidrow/Mopar Skids, Rock Lizard Super Skinks, Goodyear Wrangler Authority 31x10.5-15)
2012 Triumph Tiger (TKC 80 Front Tire Heidnau K60 Rear, Crash Bars, Skid Plate, Bark Busters, Pelican Case Top Box)

I doubt that every automotive boost gauge is calibrated exactly the same.
Boost gauge doesn't matter. Its what the ECM senses from the MAP sensor that matters.
How does your boost gauge compare to the reading from the MAP sensor?

I installed a VDO mechanical boost gauge on mine. Tapped into the Weeks elbow.
My gauge reads about 1 psi below the MAP sensor reading.

With a stock tune, the gauge will peak at about 21psi, then settle down to about 17.
With the Yeti Stage 2 tune, the gauge will peak at about 22psi, then settle down to 18-19.

I installed a circuit that allows me to fool the MAP sensor into thinking boost is too low. With this I can turn up the boost to where it peaks at 28psi, then settles down to 25-26.
If I turn it up too much I will get a under-boost code.

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U.S. Army Retired

I think flash is absolutely correct, every boost gauge will have an error, more or less.

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2005 kj CRD, samco, suncoast tc, provent, Kennedy lift pump, GDE ECO full torque, 2nd gen filter head, 245/70/16 a/t tires, mopar light bar, fumoto oil valve, OEM Skid Plates, ARB Front bumper and HD OME, tru cool LPD47391 40k GVW tranny cooler (stock cooler delete), FF Dynamics e-fan and shroud, rocker arms replaced, HDS2 190F thermostat.

I wonder with your boost turned up all of the way, if you gain any MPG's?

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05 CRD: H.D.S2 stat,WW Ironrock trilink&LCA's, OX rear,ARB front, 4.10's, ARB bumper, Suncoast,OME 3.5, JBA UCA,rock rails, Moabs&265/75 Duratracs, GDE tunes ,FFD fan,ARP's, 2 micron fuel, new valves,sasquatch battery tray & grid heater, tensioner relocated
Mech fan, VH & AC delete

No.
Didnt notice any MPG gains but it felt like there was a little bit more power.

Turning up the boost is one thing. Gotta turn up the fuel too to find the right balance. I just havent figured out how to do that. All I can do right now is try different ECM tunes.

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U.S. Army Retired