How much Turbo Boost do you run

Jimbrown · Jul 29, 2011

Made a quick trip to Tucson and back today with my 30ft horse trailer. The trip down is easy as it is all down hill. Coming back on I-10 you have to climb about 3000ft. I was running about 75-80 and pulling 20 to 22 steady PSI on the turbo. The red line is 35. I try to keep under 25 on steady runs. I go higher for short periods on hills or accelerating.

So What do you guys see on steady runs? F250 6.0

redprospector · Jul 29, 2011

My truck is bone stock except for the injectors, and straight pipe exhaust. 22 - 23 lbs is all mine will pull period.

Andy

RedNeckRacin · Jul 29, 2011

The cummins touched 41psi yesterday pulling my Deere up the backroads of pa. Usually 35psi pulls very strongly.:thumbsup:

Powerhorse · Jul 29, 2011

Jimbrown said:
Made a quick trip to Tucson and back today with my 30ft horse trailer. The trip down is easy as it is all down hill. Coming back on I-10 you have to climb about 3000ft. I was running about 75-80 and pulling 20 to 22 steady PSI on the turbo. The red line is 35. I try to keep under 25 on steady runs. I go higher for short periods on hills or accelerating.

So What do you guys see on steady runs? F250 6.0

My F350 6.0 will run high 20's to mid 30's steady pulling and gets into the 40's when I really get on it. I do however have larger injectors, a modified turbo and a few other mods going.

Diamondpilot · Jul 31, 2011

Powerhorse said:
My F350 6.0 will run high 20's to mid 30's steady pulling and gets into the 40's when I really get on it. I do however have larger injectors, a modified turbo and a few other mods going.

Both my Ford 6.0's do mid to upper 30's.

Guy across the street has a Cummins pulling truck. 85 psi of boost.

Rule of thumb is each psi equals about 10 hp to the ground at the rear wheels.

Chris

jocww · Aug 1, 2011

my 02 dmax mostly stock just intake, exhaust and boost stick and I max at 22. Wouldnt want to go much more than that as EGT creeps up.

Powerhorse · Aug 1, 2011

Diamondpilot said:
Both my Ford 6.0's do mid to upper 30's.

Guy across the street has a Cummins pulling truck. 85 psi of boost.

Rule of thumb is each psi equals about 10 hp to the ground at the rear wheels.

Chris

85 psi would split my stock intercooler for sure....49 psi was the highest I have seen.

jonyyuma · Aug 1, 2011

Do these trucks not have a wastegate attached? How do they stop over-pressure, or boost?

deerefan · Aug 1, 2011

I do not believe my 06 F250 had a wastegate, but I would only see between 22-30 psi pulling a load. I do have a light foot as diesel was $4 a gallon at the time and as we all know, farming doesn't pay!

jonyyuma · Aug 1, 2011

I don't blame you there, I have developed a light foot too. Partially due to the local populace Running Red light signals..First one thru getts T-boned?Now we have three photo-controlled ticket writing lights in our small Burg of a town. They needed money, and drivers really needed relief from" blasting lights""?The other part was my ole 83 was not turboed- and it did not do any good to pump the soot at the lights..Ha.

Diamondpilot · Aug 1, 2011

deerefan said:
I do not believe my 06 F250 had a wastegate, but I would only see between 22-30 psi pulling a load. I do have a light foot as diesel was $4 a gallon at the time and as we all know, farming doesn't pay!

6.0 has a variable vane turbo. Its motor is actually a International VT-365.

Chris

deerefan · Aug 1, 2011

Diamondpilot said:
6.0 has a variable vane turbo. Its motor is actually a International VT-365.

Chris

That is correct. Thanks Chris, could not remember the name for anything. The one bad thing about that turbo that I recall was more frequent oil changes and the recommended use of synthetic. Dirty oil killed it quick, same with carbon.

Diamondpilot · Aug 1, 2011

deerefan said:
That is correct. Thanks Chris, could not remember the name for anything. The one bad thing about that turbo that I recall was more frequent oil changes and the recommended use of synthetic. Dirty oil killed it quick, same with carbon.

Never had a drop of syn in both mine. Change the oil ever 5K with Dello 400 or Mobil Delvac. Not a single wrench on either my 04 or 06.

Chris

deerefan · Aug 1, 2011

Diamondpilot said:
Never had a drop of syn in both mine. Change the oil ever 5K with Dello 400 or Mobil Delvac. Not a single wrench on either my 04 or 06.

Chris

You change your oil every 5k hence avoiding the extended change (7500+) interval. Oil changes at 5k in any diesel is early, but you are only doing the motor good by doing this. Not knocking you at all. I found when I switched over to synthetic in my 06 it cranked easier, warmed up faster and fuel economy increased slightly. I changed it every 7500.

RobertN · Aug 1, 2011

I'm more curious about towing horses at 80mph...? I've hauled horses before; I do not like to go that fast with a live load.

When we took the 5th wheel to Texas two years ago, I could easily run those speeds. However, with this Cummins and 4:10 gears, I found my fuel mileage dropped off considerably above 63mph.

Nice thing about Az, NM, and Tx, was the major highways were in soooooooo much nicer shape than Calif highways...

Jimbrown said:
I was running about 75-80 and pulling 20 to 22 steady PSI on the turbo.

xtn · Aug 1, 2011

How much boost do I run?

Well my 03 6.0 doesn't have a guage so I'm going to answer... All of it.

Diamondpilot · Aug 1, 2011

deerefan said:
You change your oil every 5k hence avoiding the extended change (7500+) interval. Oil changes at 5k in any diesel is early, but you are only doing the motor good by doing this. Not knocking you at all. I found when I switched over to synthetic in my 06 it cranked easier, warmed up faster and fuel economy increased slightly. I changed it every 7500.

I have thought about it but the simple fact is these trucks never leave with less then 12,000# behind them. That is towing light. Most of the time they have 16,000# or more on them. I would say I am not the norm with well over 90% of my miles towing. I would rather change it more often. Funny thing is I run Full Synthetic in my other stuff like my Nissan Titan. It tows 7,000# to 9,600# 50% of its miles so I split the difference between the normal change interval and the extended change interval.

Chris

RickB · Aug 1, 2011

deerefan said:
Oil changes at 5k in any diesel is early,

Manual for a 2001 7.3 PSD specifies a 4000 mile drain interval.

deerefan · Aug 2, 2011

RickB said:
Manual for a 2001 7.3 PSD specifies a 4000 mile drain interval.

Wow did not know that. I stand corrected. Do you change it every 4k or longer? I thought diesel oil intervals were 7500.

RickB · Aug 2, 2011

deerefan said:
Wow did not know that. I stand corrected. Do you change it every 4k or longer? I thought diesel oil intervals were 7500.

The three 7.3L PSD's in the fleet at work all get New Holland 15W40 no less often than every 4500 miles with a 4000 mile target. Total mileage on the 3 is over 400,000 without engine problems.