Typical Boost PSI, Pyrometer temp when towing?
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4wd Low
Joined: May 2023
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Typical Boost PSI, Pyrometer temp when towing?
Hello!
Just getting familiar with the 1999.5 F350. I was wondering what I should expect to see for Boost PSI when towing around 10,000 lbs between 60-65mph? Please include when cruising on flats or on hills. Any knowledge is more than welcome!
Also, same question for the Pyrometer.
I have only been seeing about 7 for the Boost PSI and the Pyrometer stays around 8-9, unless going up a hill and it might hit 10.
Thanks in advance!
Just getting familiar with the 1999.5 F350. I was wondering what I should expect to see for Boost PSI when towing around 10,000 lbs between 60-65mph? Please include when cruising on flats or on hills. Any knowledge is more than welcome!
Also, same question for the Pyrometer.
I have only been seeing about 7 for the Boost PSI and the Pyrometer stays around 8-9, unless going up a hill and it might hit 10.
Thanks in advance!
Logistics Pro
Joined: May 2017
Posts: 4,667
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From: Muskogee, Ok
Mostly depends on how stock your turbo is. Completely stock 3 psi towing 10k is about right on the flats
The 7 turn mod will help with that, so will wheel and turbine upgrades
A boost leak check is the real go to for making sure all is well
The 7 turn mod will help with that, so will wheel and turbine upgrades
A boost leak check is the real go to for making sure all is well
Thread Starter
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4wd Low
Joined: May 2023
Posts: 14
Likes: 5
The max I’ve seen is closer to 15. 7 is where it tends to sit while cruising at 60-75mph and towing.
FTE Leadership Emeritus
Joined: May 2014
Posts: 27,348
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From: Lake Hartwell, GA
Your numbers look "good" for an OEM setup including no chip that could use some maintenance or tightening up. You more than likely have some CAC (intercooler system) and exhaust drive pressure leaks that will bring up your boost and bring down the EGT.
Lead Driver
Joined: Aug 2022
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From: Oologah, OK
with my CTS-3 and towing a light M/C trailer down to Georgia,
I noted that the Boost was hanging around 3 psi 80% of the time.
gentle uphill climbs raised it to 5, and my foot in it pushed it to 17
sliding downhill, it drops down to 2 psi or less
I have not hooked up the 9k lb RV yet, but I know from previous towing with my old '98 Cummins, that 9 psi is typical on the level with 13,000 lbs behind me
I noted that the Boost was hanging around 3 psi 80% of the time.
gentle uphill climbs raised it to 5, and my foot in it pushed it to 17
sliding downhill, it drops down to 2 psi or less
I have not hooked up the 9k lb RV yet, but I know from previous towing with my old '98 Cummins, that 9 psi is typical on the level with 13,000 lbs behind me
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Logistics Pro
Joined: May 2017
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From: Muskogee, Ok
I can get in the high teens @ 2k rpm, just depends on the load, turbo, injector fueling. @2300rpm I can see 25-30psi. It's really all subjective based on terrain and turbo combinations.
Making sure your individual setups pass the boost leak tests and are soot free are key. Depending on how stock he is the wastegate won't let him see more than low to mid 20s and he'll hit stock PCM tuning defuel long before 30#
Lead Driver
Joined: Jul 2017
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From: WV
Originally Posted by Wes444
I can get in the high teens @ 2k rpm, just depends on the load, turbo, injector fueling. @2300rpm I can see 25-30psi. It's really all subjective based on terrain and turbo combinations.
Matthew, this is not with a stock turbo.
And the temperature was really cold which make these things rock stars. I was just messing with Wes.
Originally Posted by Wes444
Making sure your individual setups pass the boost leak tests and are soot free are key.
Fleet Mechanic
Joined: Nov 2005
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From: North Carolina, Raleigh
Jason.. where is your boost measured?? I replace the AIH with a boost sensor that is right by the spyder.. Stock truck with Tony Wildman tow Tunes on 6 selection ****.. (60 HP TT my go to) towing 8300 lb RV, uphill 4-5% or so in OD speed around 65 rpm around 1750 my boost showes like 12-17.. EGT will be around 9-11.. (if i am tryint to keep speed up or before downshifting trans) I did replace compressor wheel with WW2 4X4 blade and that helped.. when the trans was worked on recently there was no leaks noted on up pipes, everything is tight and clean,, i run the S&B oiled filter and it was recently cleaned..
just wondering if I am missing something on boost ?? or does that sound normal..thanks
just wondering if I am missing something on boost ?? or does that sound normal..thanks
Lead Driver
Joined: Jul 2017
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From: WV
Jason.. where is your boost measured?? I replace the AIH with a boost sensor that is right by the spyder.. Stock truck with Tony Wildman tow Tunes on 6 selection ****.. (60 HP TT my go to) towing 8300 lb RV, uphill 4-5% or so in OD speed around 65 rpm around 1750 my boost showes like 12-17.. EGT will be around 9-11.. (if i am tryint to keep speed up or before downshifting trans) I did replace compressor wheel with WW2 4X4 blade and that helped.. when the trans was worked on recently there was no leaks noted on up pipes, everything is tight and clean,, i run the S&B oiled filter and it was recently cleaned..
just wondering if I am missing something on boost ?? or does that sound normal..thanks
just wondering if I am missing something on boost ?? or does that sound normal..thanks
My setup includes a T4 Borg Warner SXE turbo.
I also ran the riffraff billet wheel before this and was very pleased with it. Unfortunately I struggled a little with EGTs so did the T4. I later found a boost leak at my plenum. Had I found and fixed that with the stock turbo and riffraff wheel then I most likely would have been satisfied and not went down the T4 path.
My boost for the mechanical gauge is in the Y, what used to be the spider and AIH port. Different for the T4 setup.
The digital display is from the PCM and is at the limit of what the MAP sensor can read.
I used to run Wildman tunes. I prefer the free PHP tunes from the Hydra library and run those now. TW’s shifted harsh and was smokier than I liked.
Don’t pay too much attention to my results compared to yours. If you’ve never done a pressurized boost leak test then that’s always recommended to make sure everything is sealed up well.
FTE Chapter Leader
Joined: May 2006
Posts: 11,273
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From: North Dakota
Idk on my 7.3 when I did the WW2, boost fooler waste gate shut off and a upgraded HPOP along with a tune, I could hit 45 PSI if the tuner was at max setting.(only did it a couple times, worried I’d blow the head gaskets) The tuner In the tow stetting I would see 30-35 when towing uphill. Stock I would see about 20-25 psi.
Cargo Master
Joined: Mar 2019
Posts: 2,907
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From: Kinnula,Finland
Big factor is the WG in 0.84 housing.
I saw 22 psi with bonestock van,1.15 housing.
And 45 psi with chip and stock injectors.
IMO with stock injectors WG can be yanked in closed position.
I saw 22 psi with bonestock van,1.15 housing.
And 45 psi with chip and stock injectors.
IMO with stock injectors WG can be yanked in closed position.