Normal Boost Pressure?
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Senior User
Joined: Jul 2018
Posts: 199
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From: Virginia
Normal Boost Pressure?
Hey guys,
I have been thinking that I have a "bad" exhaust manifold leak for a week or so because mileage went down after I replaced the manifold and I swear I hear a ticking on the driver's side. I just installed some Glowshift gauges though and I can make 18 lbs of boost unloaded going up hill with the peddle floored. My truck is stock tune (I have a Hydra but it was in 01 position which is stock) and the only real mod I have is an S&B air intake. Does this sound like low boost for my setup? Maybe I am imagining the manifold leak...... Fuel pressure is around 68 and EGT's seem to be 500 to 600ish or so once she warms up a bit.
I have been thinking that I have a "bad" exhaust manifold leak for a week or so because mileage went down after I replaced the manifold and I swear I hear a ticking on the driver's side. I just installed some Glowshift gauges though and I can make 18 lbs of boost unloaded going up hill with the peddle floored. My truck is stock tune (I have a Hydra but it was in 01 position which is stock) and the only real mod I have is an S&B air intake. Does this sound like low boost for my setup? Maybe I am imagining the manifold leak...... Fuel pressure is around 68 and EGT's seem to be 500 to 600ish or so once she warms up a bit.
Postmaster
Joined: Nov 2015
Posts: 4,807
Likes: 125
From: Colorado Springs
The PCM defuels at 22-23 # of boost. If you’re getting 18, and if you consider maybe a margin of error with the gauge of 2-3# ...you’re probably doing alright. You can test for leaks and you’ll KNOW if you have one. When are you seeing EGT’s of 500-600…?
Lead Driver
Joined: Mar 2004
Posts: 5,372
Likes: 108
From: Northern Indiana
I was going through the same thing not to long ago. Make a boost leak tester and pressure test the system. I found small leaks all over the place in my truck. Fittings, guages, etc. A bunch of small leaks aren’t noticed when just driving around. However can make a big difference when wanting performance.
Not the exact thread I was thinking of but this gives you the basics. https://www.ford-trucks.com/forums/1...ctor-pics.html
Just remember to start low on the psi. Like 15psi, I normally regulate down my compressor so I can leave the air line hooked up.
Not the exact thread I was thinking of but this gives you the basics. https://www.ford-trucks.com/forums/1...ctor-pics.html
Just remember to start low on the psi. Like 15psi, I normally regulate down my compressor so I can leave the air line hooked up.
Laughing Gas
Joined: Mar 2015
Posts: 885
Likes: 2
From: Pittsburgh
Was actually wondering the same thing. The top number I've seen is about 18 and that was hammer down. With my normal driving style the highest I see is 10psi. I have oil soaked boots so those are on the list to replace and could possibly be affecting my pressure.
Thread Starter
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Senior User
Joined: Jul 2018
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From: Virginia
Thanks all - great information in this thread! I actually have a boost pressure test kit but haven't used it yet, time is precious this year (I have a new 1 year old to chase around!). I am also close to taking the plunge into a T4 upgrade that will allow me to replace almost all of the common leak areas and will boost test after the upgrade.
Laughing Gas
Joined: Aug 2014
Posts: 1,020
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From: Washington State
Stock Truck, no mods, minimum leaks, 15-18 is all u get. start pulling hoses, doing mods, spending obscene amounts of money buying shiny stuff without bulletproofing the maintenance stuff, then u start breaking stuff....
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Freshman User
Joined: Sep 2008
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I was getting 13-14 psi on completely stock 2000 F450 zf-6. Then rebuilt turbo with Riffraff billet wheel, red line mod, 8 turns in on wastegate actuator rod, bellowed up-pipes, and boost leak check - now I might touch 15 psi.
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Laughing Gas
Joined: Mar 2015
Posts: 885
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From: Pittsburgh
Yeah I definitely am going to leak check as soon as I get around to doing all the boots. Any suggestions on boot kits? Sinister seems to be the better deal over RiffRaff but I like RiffRaff so I'm torn. Shockingly RockAuto was fairly expensive.
New User
Joined: Jan 2019
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Boots
I just bought this kit:
https://www.dieseltruckpartsdirect.c...kaAj3oEALw_wcB
Seemed like a good deal to me.BTW... this my first post. Hello everyone.
https://www.dieseltruckpartsdirect.c...kaAj3oEALw_wcB
Seemed like a good deal to me.BTW... this my first post. Hello everyone.
Laughing Gas
Joined: Mar 2015
Posts: 885
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From: Pittsburgh
Welcome to FTE! Make sure you hop over to the new member thread and introduce yourself. You need a couple of posts before you can put up pictures or send PMs. Thanks for the suggestion, that does look like a pretty good deal.
Cargo Master
Joined: Aug 2009
Posts: 2,137
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From: Glendive, MT
I just bought this kit:
https://www.dieseltruckpartsdirect.c...kaAj3oEALw_wcB
Seemed like a good deal to me.BTW... this my first post. Hello everyone.
https://www.dieseltruckpartsdirect.c...kaAj3oEALw_wcB
Seemed like a good deal to me.BTW... this my first post. Hello everyone.
Be careful around here. PMS (Powerstroke Mod Syndrome) is contagious.
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Senior User
Joined: Jul 2018
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From: Virginia
Update for the thread. I just used my 80 HP Daily Driver tune and I can make 22 lbs of boost flooring the truck. I think she's pretty good with minimal leaks. I am going to "re do" the turbo boots and pipes and install bellowed uppipes when/if I do the T4 upgrade and I can also remove the exhaust manifold gasket and go metal to metal at that point as well (I don't think its "bad" to leave the manifold gasket on until then).
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Banned
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Hey guys,
I have been thinking that I have a "bad" exhaust manifold leak for a week or so because mileage went down after I replaced the manifold and I swear I hear a ticking on the driver's side. I just installed some Glowshift gauges though and I can make 18 lbs of boost unloaded going up hill with the peddle floored. My truck is stock tune (I have a Hydra but it was in 01 position which is stock) and the only real mod I have is an S&B air intake. Does this sound like low boost for my setup? Maybe I am imagining the manifold leak...... Fuel pressure is around 68 and EGT's seem to be 500 to 600ish or so once she warms up a bit.
I have been thinking that I have a "bad" exhaust manifold leak for a week or so because mileage went down after I replaced the manifold and I swear I hear a ticking on the driver's side. I just installed some Glowshift gauges though and I can make 18 lbs of boost unloaded going up hill with the peddle floored. My truck is stock tune (I have a Hydra but it was in 01 position which is stock) and the only real mod I have is an S&B air intake. Does this sound like low boost for my setup? Maybe I am imagining the manifold leak...... Fuel pressure is around 68 and EGT's seem to be 500 to 600ish or so once she warms up a bit.
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