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post #1 of 5 Old 05-05-2013, 05:04 AM Thread Starter
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Smile 6.4L Boost

Hi guys. New member! Just bought an '08 King Ranch F350 Crew Cab DR Super Duty with 38,000 miles, 6.4L, factory turbo, 4.10 rear end. Took it out last night on the interstate with cruise set at 65 MPH. Engine turned around 2000 rpm, but even on the flat terrain I was reading around 1 on the boost gage. Fuel mileage was between 13 & 14. Is this normal to have that level of boost without towing or hauling anything?

thanks in advance.
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post #2 of 5 Old 05-05-2013, 05:30 AM
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That seems extremely low. I'm between 5 and 10 on flat ground. If there's a head wind I'm a bit higher.

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post #3 of 5 Old 05-05-2013, 05:36 AM
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Your boost is definitely low that truck is capable of 50. And I'm sure you can raise that mpg too.


07 F250 Lariat ECSB bed FX4 6.0
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post #4 of 5 Old 05-05-2013, 05:47 AM
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Maybe he meant the first mark on factory boost gauge. In that case it would be 10psi and close to what mine runs on the highway.
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post #5 of 5 Old 05-05-2013, 05:58 AM
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ahh i forget about factory ones.. you may be correct good call.


07 F250 Lariat ECSB bed FX4 6.0
leveling kit
XD Strike 17x9 -24 offset 295/70/17 Hankook ATm
HID's
fox shocks & fox dual steering stabilizer kit
K&N CAI
4in. turbo back straight pipe
ARP head studs
EGR delete
SCT Livewire custom tuned
sinister diesel coolant filter kit
blue spring
6.4 Banjo Bolts
BPD 48v FICM
Alpine double din
4 Hertz door speakers
2 rockford fosgate 10's
kenwood amps.

More pics in profile.
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