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Jan 2, 2008 | 04:33 PM

hunt2r

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From: Indiana

Boost pressure

What kind of boost pressure are you seeing. On the interstate running 65-70 I am seeing about 20-25 and if I encounter a grade it goes up to around 30. I am curious as this seems high compared to the 6.0. I know this engine is totally different. I have a F-350 DRW 4X4 6.4 PSD auto 3.73

Jan 2, 2008 | 05:12 PM

jam105

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From: In My Mind

I'm about the same..Some folks talk about keeping the boost under 10 for mpg...I can hardly get my F-450 up to speed without going 20....

Jan 2, 2008 | 05:19 PM

hunt2r

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From: Indiana

Thanks. I have no idea how they are keeping the boost that low.

Jan 2, 2008 | 05:29 PM

kawtiper

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Quote:

Originally Posted by hunt2r

I have a 250 with the same rear end as you w/20" rims. When the beast is cold it wont get out of its own way under 10lbs of boost. warm it does ok but is usually a little over 10lbs. 65 or 70 no problem under 10 lbs until a good incline then it goes up. cant say I have seen over 28 but have not towed the toy hauler yet.

Jan 2, 2008 | 05:50 PM

10000LBS

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When I run my truck in the mountains of British Columbia I would see the boost gauge go up as far as 35 psi and on the down slopes to about 1 psi. I figure if I am going to blow the turbos then so be it.

Jan 2, 2008 | 05:55 PM

fordfish

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From: at Work

Me too, I have tried to take off under 10 lbs, but it takes 5miles down hill to stay under 10. 20-25 at 65-70 seems normal.

Jan 2, 2008 | 05:59 PM

hunt2r

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From: Indiana

Thanks guys. This is my 8th ford diesel truck and this is the nicest one yet. I have my fingers crossed that this one is as dependable as the others. I have not had a bad one yet.

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Jan 2, 2008 | 06:40 PM

PSD6litre40

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From: Tennessee

I have pegged mine pulling the mountains between NC/TN (The Smokys) pulling about 15K

Jan 2, 2008 | 06:48 PM

#10

kawtiper

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From: in front of this PC

I guess we just have more air to start with here at 0 feet in elevation.
we can get the job done with less boost.

Jan 2, 2008 | 07:04 PM

#11

SUPERDUTY_untouchabl

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Quote:

Originally Posted by PSD6litre40

I have pegged mine pulling the mountains between NC/TN (The Smokys) pulling about 15K

You were one of the ones I was reffering to.

Jan 2, 2008 | 07:46 PM

#12

lucky7

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Quote:

Originally Posted by hunt2r

When I bought my truck in the summer, I could cruise at 70 mph and see 10 psi of boost pretty consistently. Now that the temps have tanked, I see more like 15 to 20 psi of boost. My gas mileage has also decreased in the cold weather along with the increase in boost pressure. Just one more reason I can't wait for it to get warm again. The older I get, the colder I get.

Jan 2, 2008 | 07:57 PM

#13

Sayonara

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From: SE Michigan

avg 10-15 at ~70 unloaded. terrain and load changes the numbers...

Jan 3, 2008 | 07:35 AM

#14

PSD6litre40

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From: Tennessee

Quote:

Originally Posted by SUPERDUTY_untouchabl

You were one of the ones I was reffering to.

Also, I am pulling that same grade with my 6.0 w/ a tow tune wide open to maintain 65 MPH. The 6.4L doesn't even struggle I can slow down and gain the speed right back with the 6.4! Oh yea, at 40+ PSI those twins are screamin!

Jan 3, 2008 | 12:57 PM

#15

luke1213

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my boost pressure is wierd. sometimes it stays around 20psi when cruising. i have seen it as high as 40 not pulling anything and doing about 80 mph on the freeway. one day it hovered arounf 35 psi for about 2 1/2 hours. i asked ford about this and they didn't have an answer. turbo bearing will probably be the next thing to go out on this truck.